5.028 fișiere audio royalty-free pentru "Mic"

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02:03
Capoeira mestre calango was nice enough to do a couple of short recordings on the berimbau for me. A berimbau is a one stringed instrument with the string made from the inside liner of a truck tire, it has a claxia(sp?) a shaker with it and is modulated by placing the gourd against the stomach and removing it. Done with hdp2 and two sennheiser mics 66 67, was in 24 bit 96khz, downconverted to 16b at 44. 1, a relatively clean recording at a very high level.
Autor: Brfindla
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01:03
Capoeira mestre calango was nice enough to do a couple of short recordings on the berimbau for me. A berimbau is a one stringed instrument with the string made from the inside liner of a truck tire, it has a claxia(sp?) a shaker with it and is modulated by placing the gourd against the stomach and removing it. Done with hdp2 and two sennheiser mics 66 67, was in 24 bit 96khz, downconverted to 16b at 44. 1, a relatively clean recording at a very high level.
Autor: Brfindla
00:00
00:42
4ch field recording of an underpass below a german motorway, the a38 by leipzig. The recorder is located directly beneath an expansion joint on the edge of the underpass, the clonks and clanks of cars and trucks driving over the joint can clearly be heard, with the motorway noise reverberating in the underpass in the background. Recorded with a zoom h2 with a rycote windscreen, mounted on a boom pole. These are the rear channels, mics set to 120° dispersion.
Autor: Blaukreuz
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00:13
Mid range field recording of the area in front of the new york times building in new york, taken from opposite the building on the corner of 8th ave and west 40th st. Cars can be heard driving by, horns are honked, brakes are trodden etc. A sweeper vehicle features sometimes. People can rarely be heard, as the recording was done at about 6 am on a saturday morning in march 2012. Recorded with a zoom h2, mics set to 90° dispersion.
Autor: Blaukreuz
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01:34
4ch-surround, close range field recording of the street outside a friend's house during new year's eve. It has just turned 12, people all around are shooting off fireworks, including my 12 year old daughter and her pals, whom you can hear on this recording. About a minute into the recording, a rocket is shot off in the near field. Recorded on jan 1st, 2014 at 12:00 am with a zoom h2. These are the rear channels, mics set to 120° dispersion.
Autor: Blaukreuz
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01:34
4ch-surround, close range field recording of the street outside a friend's house during new year's eve. It has just turned 12, people all around are shooting off fireworks, including my 12 year old daughter and her pals, whom you can hear on this recording. About a minute into the recording, a rocket is shot off in the near field. Recorded on jan 1st, 2014 at 12:00 am with a zoom h2. These are the front channels, mics set to 90° dispersion.
Autor: Blaukreuz
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02:08
Crowded diner/restaurant in tokyo. This is a stereo mixdown of a 4 channel surround recording i took in a crowded restaurant in tokyo. You can hear a a lot of conversations, some waiters and lots of utensil sounds. Most of the conversation in the background is in japanese. I think i heard some english when i edited this, but i'm not really sure. Anyways, good stuff. Mics were places at a 20 degree and 90 degree angle and then later mixed down to stereo. Enjoy!.
Autor: Markystar
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01:23
I live in a block. And at 7:30, some men begun removing a concrete floor of a balcony with a jackhammer. I held the recorded from another balcony around 15 meters away hoping i win't get too much wind in my mics. This guarantees you to be awake in seconds. So i'm sharing the love. Recorded with zoom h2 at 96khz/24-bit. Truncated and converted to flac using audacity, otherwise unprocessed (raw).
Autor: Unfa
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06:04
These recordings were made at the annual "tag der sachsen" (saxony fair) in freiberg. Recordings were done on the main market square (obermarkt), where a local radio station had set up a large stage for concerts and other events. Recording was done with a zoom h2, mics at 90° dispersion. This is the early morning after the event, at about 7. 30, stage hands are taking down the rigging, workers are clearing away trash and loading trucks. During the recording, someone starts working with a leaf blower.
Autor: Blaukreuz
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04:27
Erm, i rolled a hard boiled egg around in a large ceramic fruit bowl. . . For a project. I used a stereo pair of fel 'clippy' mics and recorded onto a sounddevices mixpre-6. Some light noise reduction and normalizing using izotope. I do not require any credit or attribution. If any of these sounds have been of help, and you are feeling charitable, please do consider donating to freesound to help keep the site running (a link is also on the home page). Any donations are greatly appreciated!.
Autor: Walthamstow Walker
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02:52
Slightly edited, very clean recording of city background noise. Recorded myself as i couldn't find anything 100% suitable on here, for use in a film sound mix. Recorded at the top of humboldthain bunker in berlin, germany on the 1st of december 2019. Recorded at night, no bird sounds, with the onboard mics on a zoom h4n. You do not need to credit me if you use this. Take it for whatever you want. If you like it, please give a good rating and consider uploading some of your own sounds on here to help out other users!.
Autor: Yakobb
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01:02
A plastic water pipe in the forest with a hole on top, sending a 2 meter high jet of water into the air. The water came pouring back down onto the plastic pipe. Recorded in stereo 24 bit 96 khz with the internal mics on a sony m10 with windjammer. Please use this sound for whatever you want, completely free, no restrictions. Although i really appreciate a comment if you use my sound for something interesting. Always fun to hear where my recordings end up :).
Autor: Augustsandberg
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00:38
An empty car of the metro of porto, portugal arrives at an aboveground empty station on a january morning in 2022. Recorded with a zoom h1n. This was a no-service subway stop so the doors did not open and there is no passenger noise. The audio travels from one side to the other as the metro passes because of the stereo mics. I've benefited a lot from cc by 0 recordings on freesound--i use them for my bandcamp projects. It would be fun to know what you did with this one.
Autor: Seconds Elsewhere
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01:32
Tiny waves lapping the quartzite pebbles (1-2cm diameter) on a beach at lake pedder. Recorded 21 march 2019, 3am, with the internal mics on a marantz pmd661. For noise reduction, capture a noise print around 0. 09. Exceptionally quiet night, no wind, no other sounds. The gordon river power station was 20 kms distant. Other mechanical equipment or vehicles greater then 50 kms. I could just perceive the electrical hum from the station (or from transmission lines), and so could my partner, but i can’t hear it on the recording. See also "tiny waves lapping #1".
Autor: Guyburns
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01:25
Ocean waves recorded from between two rocks. Recorded on a zoom h4 with the mics covered in zeppelin fur at 44100 hz 24-bit. There's some slight wind noise that can be filtered from 150hz downward. This is part of a series of recordings for an ambient music project i'm working on. There are some excellent ocean recordings on freesound if you're looking for a more traditional ocean sound, but my intent with these clips was to try to capture some natural phase-shifting by placing the h4 in cracks and crevices for a more hollow, "closed-in" sound.
Autor: Greysound
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07:40
Recorded in fryers forest in country victoria, australia. I placed a my mics on the end of a jetty facing across the small "lake" towards a house where we had our new year's eve celebrations. It was a small gathering of around a dozen people, there was no countdown, in fact midnight crept up on us! in the far distance you can hear fireworks in castlemaine a small town about 15 km away. Recorded with and ms setup using a sennheiser 416 and a sennheiser mkh 30 into my zoom h4n.
Autor: Kangaroovindaloo
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00:50
Night-time wide angle stereo recording of manhattan, as heard from across the east river, the recorder was kindly allowed access to the veranda of the riverview restaurant & lounge in long island city and is facing the manhattan skyline. Some noises of the restaurant can be heard in the background, very subdued, the quiet lapping of the east river can be heard in the foreground, and manhattan bustle and traffic on the fdr drive is in the wide range. Recorded in march 2012 with a zoom h2, mics set to 90° dispersion.
Autor: Blaukreuz
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04:49
A pedestrian crossing in the inner city of stockholm/sweden, on the intersection of the mäster samuelsgatan and the drottinggatan. It is a rainy afternoon and there is a fair amount of pedestrian and automobile traffic underway. The recorder is on street level, pedestrians can be heard speaking swedish, german, russian and a variety of other languages. Near the end of the recording, a can rolls across the pavement near the crossing. Recorded with a zoom h2n. These are the rear channels of a 4ch surround recording. Mics set to 120° dispersion.
Autor: Blaukreuz
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04:03
Wide-angle soundscape of trovill beach on the swedish island of sandhamn on the eastern outskirts of the stockholm archipelago. It is a partly cloudy, windy day and a fair amount of people are at the beach, few are bathing. Some boats and ships pass by in the mid distance. The recorder is situated in a small wood some 40m or so from the shore, facing the beach and capturing a wide angle. Recorded with a zoom h2n. These are the rear channels of a 4ch surround recording. Mics set to 120° dispersion.
Autor: Blaukreuz
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05:21
(recorder: zoomh4npro 2018)(microphones: binaural roland cs-10em in-ear monitors). As these are recorded using binaural in-ear mics, i purposefully don't turn my head to keep the sound clean and coming from the same direction. This is traffic on hwy 134 (next to walt disney studios / warner brothers studios) recorded while standing on the hollywood way overpass on 11/16/2018 in burbank, ca. Surprisingly, traffic flow was pretty good and i would assume cars were traveling around 40 to 50 mph. Enjoy,. Christopher c. Courter.
Autor: Courter
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13:27
Does freesound really need another recording of someone washing their dishes? maybe not, but this is a longer take i recorded for a film project - because when you're editing, it's frustrating to find a good recording that's not long enough!. Includes plenty of dish movement, running water, scrubbing, etc. Some limiting was applied to tame the biggest peaks. Mics: schoeps cmc6 mk4 stereo pair in xy configurationrecorder: sound devices mixpre 3 directly into reaper. Please note that this is a 48k 24bit flac file - flac files can be easily read and converted by audacity [https://www. Audacityteam. Org/] and reaper [http://reaper. Fm/], among others.
Autor: Thaighaudio
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05:56
One meter wide, dead-end alley in my down-town city. At the end of the street is the main shopping street. The bird you hear are sparrows arguing. I'm sitting in the half away the small street with the headphone on and suddenly this man with a trolley came from behind. Not good for my health. It's a warm day in june 2011. Sony pcm d50 recorder internal mics xy90location: rozemarijnstraatje 's-hertogenbosch, holland.
Autor: Klankbeeld
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00:06
A parisian fire truck passes about 150 feet away and briefly turns on its siren to make sure nobody overlooks it. Emergency vehicles in france have either two-tone or three-tone sirens. Vehicles to which one must yield the right of way, such as fire trucks, use the two-tone siren. The three-tone siren (not on this recording) is used for vehicles that do not require drivers to yield but should still be given some priority. Recorded with a zoom h4n hand-held, stereo 96 khz / 24 bits, built-in mics, about 150 feet away from the passing truck.
Autor: Mxsmanic
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06:58
Tokyo outdoor night ambience. This is a recording of the shinagawa area of tokyo after 1:00 am. Crickets can be heard chirping in the distance, as can cars on a usually busy road. The trainstation is closed, but there is still some activity that can be heard as well as wind and other night ambient sounds. Recording was made on the 6th floor of a highrise apartment behind shinagawa station. 2 mics placed at a 120 degree angle were used. No filtering was used. The only editing done was removal of the beginning and end of this clip.
Autor: Markystar
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03:02
It's recess time at san lorenzo de el escorial's real colegio alfonso xii's boarding school, madrid, spain. Children are playing games, mainly soccer, on escorial monastery's front esplanade, apparently used as a schoolyard. High pitched voices blend with bypasser's conversations. Putting aside the fact that we're on a world heritage site, this could also be your regular park where youngsters gather any afternoon. Recorded with a sony pcm-d50'stereo mics with wind muff.
Autor: Nomadas
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00:37
Stereo recording of the interior of an ice cream parlor in the historic center of dubrovnik / croatia. It is early afternoon in high summer. The sales crew are a merry lot, bantering loudly with the tourists of different nations that are absolutely cramming the place. Lots of multinational voices can be heard, men, women and children talking loudly and all at once. Under that is the intense hum of a cooling system working itself to death!the ice cream was good too. I can recommend the peanut flavor. Recorded with a zoom h2, mics set to 90° dispersion.
Autor: Blaukreuz
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01:26
Field-recording of the creek found in old ellicot city, md. The creek is located in a suburban town, and is surrounded by a man-made rock moat about a story below street level. Recorded using a sony pcm-m10 at 24bit, 96k. The sound has been gently processed!!- hpf (6db slope) to remove rumble- compressor (ni supercharger gtx) with a minimal 1db gain reduction in m/s mode and a bit of warmth added. - ozone 5 for a little m/s eq to alleviate some of the watery pops on the sides and a little stereo widening to compensate for the pcm-m10's built in omni mics.
Autor: Djtiii
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04:52
This is a recording of a slow freight train passing from about 50 feet away using the internal mics of a tascam dr-40. The recording was made in southern mississippi, usa. The train was going down a gentle slop, around a bend. The engines can be heard approaching and passing, followed by the various sounds made by the wheels as the individual cars pass. The file was edited using adobe audition 6. The processing used was a high pass filter around 30 hz and a multi-band compressor. A couple of times during the recording clipping of the pre-amps can be heard because i was manually riding the input gain.
Autor: Chegwood
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03:05
The exciting thing about recording and cataloging natural sounds is how you get nice, unexpected surprises. I was up early recently one spring day and did not have any real plans to record, until i stepped outside with my coffee to see what the weather was like and was nicely surprised with the light, steady spring rain that was falling in my yard; during the whole time this energetic carolina wren kept on singing through the rain. I rain, got my recorder and recorded a full hour of this peaceful pattering. You hear the drops hitting the concrete patio, the shingled overhang and a plastic chair. Zoom h4n recorder using the stereo built-in mics.
Autor: Kvgarlic
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00:06
I've put this sound as public domain (cc0) so i (and you) don't have to fiddle with figuring out the minutiae of various cc licenses. Go crazy! use it for anything you like, but do drop me a line and tell me how you're using it! i'd love to hear. Dropping a metal finger band ring 3 times onto my wooden dining room table. Could be interesting for musical applications e. G. Textures in a drum loop, or even foley work. Recorded at 24bit 48k into reaper on a macbook promicrophone: zoom h4n through the onboard stereo mics. Processing: only a gentle highpass at 50 hz.
Autor: Afamiliarletter
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03:01
Sound of balinese chimes recorded with tascam dr-60 d mkii linear recorder and pair of akg p120 electret condenser microphones on a stagg smc3 3m xlr cable. Knobs of sensitivity were turned in position of highest sensitivity. Microphones were configured as stereo pair and placed face to face in front of each other in distance of 75cm. Microphones placed on stands. Chimes was held in the hand between mics along the way of sight of them, with smallest bell on the side of right microphone. Recorded afternoon in a bedroom with closed door and windows in a house next to high street. Recorded in 96khz and 24bit. Trimmed and normalized in flstudio edison. Normalization made sample 32bit.
Autor: Laffik
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01:36
As i heared our doog eating the crunchy vegetables, i quick got my zoom h4n to record it. The maybe some noise of a fly or traffic in the background, but the internal mics were very close to the food-bowl. I had some issue when i came very close as the dog tried to eat as fast as possible, so i prefered to lay the recorder on the ground and kept away with my arm so the eating could be more relaxed. But the dog gobbled anyway in a fast way. Enjoy the soundscape. Maybe use it for asmr ;-).
Autor: Druki
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07:03
It's a recording of a man operating a chainsaw in a forest near an underground repair station. I've been biking through the forest whe i heard the chainsaw, so i stopped and recorded 7 minutes of him cutting off branches, tembers and walking around a bit. You can heat the chainsaw, natural forest reverb, sometimes a plane flying by or an undergroud train. The recording was made from around 20~30 meters from the sound source. Recorded with a zoom h2 (rear mics, hi gain, 96/24). Originally a 96khz / 24-bit wav file. Converted to flac using audacity.
Autor: Unfa
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13:51
Recorded on the san francisco side of alcatraz island, 08/25/2015. Recorder was placed on the railing on the back side of the yard above the staircase. A clear day, with plenty of water birds and gulls. Some tourists speaking various languages throughout. . . Some asking about the 'microphone'. This recording also catches the sf noon siren and a sea plane flying toward the end. My windjammer wasn't quite enough for the wind, so there's some rumble, but it can be cleaned up. Recorded with a tascam dr-70d, built in mics. Free to use, but let me know where it ends up!.
Autor: Jaeisele
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28:03
This is audio of just about the entire ride of the powell-hyde cable car line in san francisco, recorded on 08/26/2015. Late evening trip through the city. I recorded this while i was on the steps on the right side of the car, holding the recorder in one hand and my life in the other! tourists talking, the operator ringing the bells and using the brake levers, etc. Recorded with a tascam dr-70d, built in mics. Free to use, but let me know where it ends up!.
Autor: Jaeisele
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01:48
Two contact microphones recording an engine from a mini cooper s in sport mode. Surprisingly aggressive-sounding. Intended to use for a race car asset. Contact microphones are stethoscope-like mics that you place onto a surface to record vibrations. This way, i was able to record the raw engine without wind or perspective. The left channel is the chassis and the right is the engine block. . . Blending the two together produces a great sound. Free to use.
Autor: Thelittlecrow
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01:45
4ch surround recording of a bike riding through city traffic (leipzig/germany) on an evening in late spring. Recorded with a zoom h2 with a rycote windshield in a shock mount fastened to the center frame above the pedals. All recordings in the set are raw from the recorder and will usually need a hi-pass filter to deal with the rumble. Steady riding and freewheeling along a minor street, with some cars and a scooter passing, some gear switching and stopping at a red light with cars passing on the intersecting street at the end. These are the rear channels, mics set to 120° dispersion.
Autor: Blaukreuz
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05:45
An excerpt from some in-car driving recordings i made with the windows wound down. My starting point is geotagged. I first turn right out of trail ridge court in streamwood, il, then wait to turn left at the intersection of schaumburg road and south sutton road. I then head north on il route 59. The car is a 1996 chrysler lhs 3. 5l v6 (note the recognizable sound of the creaky chrysler transmission as i slow to a stop). My recording setup was two audio technica at851a boundary mics, mounted upside down on the interior roof and facing out of the driver and passenger windows (with appropriate wind protection), running through a mixer into a zoom h4.
Autor: Audible Edge
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00:08
Sparrows flying from branch to branch in a bare rose bush. Unintentional capture of sound as i was just out walking testing new equipment. This recording was made using a sound devices mixpre6ii and a stereo pair of fel em172 mics. Low cut on the sd which in basic mode is 80hz (i think). There is no processing to this recording other than to ‘normalize’ the levels. I do not require any credit or attribution. If any of these sounds have been of help, and you are feeling charitable, please do consider donating to freesound to help keep the site running (a link is also on the home page). Any donations are greatly appreciated!.
Autor: Walthamstow Walker
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02:17
A second attempt at recording the deep mud i keep finding myself walking through each morning on walthamstow marshes. This recording was made using a sound devices mixpre6ii and a stereo pair of fel em172 mics (connected to a bent wire clothes hanger and positioned about 30cm above my feet). Processing: normalize -1. 0db, low cut filter 100hz, minor noise reduction to reduce background traffic/train noise. I do not require any credit or attribution. If any of these sounds have been of help, and you are feeling charitable, please do consider donating to freesound to help keep the site running (a link is also on the home page). Any donations are greatly appreciated!.
Autor: Walthamstow Walker
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05:51
(recorder: zoomh4npro 2018)(microphones: binaural roland cs-10em in-ear monitors). As these are recorded using binaural in-ear mics, i purposefully don't turn my head to keep the sound clean and coming from the same direction. This was recorded in the burbank town center food-court area. I was careful to avoid specific conversation for legal purposes. There was a cranky baby nearby, so you get an occasional frantic cry. This would be perfect for any project taking place in a large, public center with a tile or stone floor and lots of movement. Enjoy,. Christopher c. Courter.
Autor: Courter
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00:47
I wanted to record the sound of a keyring - or rather the keys strapped to it - make while in mid-air. There are the keys audible, recorded hitting the stack of hay (soft landing) and air blowign into the mics while the recordied has high velocity. I was throwing my recorer with my left hand, while simultaneously throwing my keyring with my right hand. The throw was vertical and the landing zone was a pile of hay. I thing there are some interesting sound here, i'm uploading it unedited to make it possible to cut out whatever you like. Recorded with a flying zoom h2 at 48khz/24-bit, edited, nomalized and converted to flac using audacity.
Autor: Unfa
00:00
08:07
Rear channels of a 4ch-surround recording of the interior atmo of a small airbus passenger airliner (a lufthansa flight from london heathrow to berlin tegel). In the onset, you hear the steady drone of the jets, people talking, coughing, sneezing, newspapers rustling and notebook computers being typed on. Now and then, passengers and stewardesses pass by the aisle. Near the end, a signal bell sounds, and the drone of the jets takes on a perceivably higher tone, shortly after which the landing in berlin is announced, first in german, then in english. Recorded with a zoom h2, the mics (rear) set to 120° dispersion.
Autor: Blaukreuz
00:00
09:39
A short recording of construction work on a ten-storey apartment building in the blackhorse road area of walthamstow, london. General construction noises. This recording was made using a sound devices mixpre6ii and a stereo pair of fel em172 mics. Low cut on the sd which in basic mode is 80hz (i think). There is some processing to this recording to ‘normalize’ the levels and light eq-ing. I do not require any credit or attribution. If any of these sounds have been of help, and you are feeling charitable, please do consider donating to freesound to help keep the site running (a link is also on the home page). Any donations are greatly appreciated!.
Autor: Walthamstow Walker
00:00
09:13
Recorded using tascam dr-40 and pair of behringer c2 mics c. 10am, sunday march 19, 2017. Location: robin hood way (byway), manor hills - c. 2km south of urban edge worksop, nottinghamshire. Mixed scots pine & larch plantation with beech trees adjacent to trackway. Dry with light breeze. The murmur of the wind in the pines runs through out this recording - ebbing and flowing with the breeze. There is much woodland birdsong. Some other noises of human making can also be hear and interrupt the otherwise peaceful rural ambience. Distant jet aeroplane 0:13truck on nearby road (b6034) 2:43drone of propeller aircraft can also be hear in much of recording - prominent at 2:57, 3:23muffled gunshots 3:04, 3:34, 7:01,7:56clearer gunshot 4:50distant motorbike 8:26 to end.
Autor: Ajaxschuren
00:00
07:20
Recorded in my dad's bedroom with lifecam hd3000 webcam. This is a much better recording than my previous oxygen concentrator file, as i hauled my desktop into the bedroom at the other end of the apartment where the machine now is, when i was home alone. The webcam is on the bed about 3 or 4 feet from the machineat the beginning of the file you hear me flip the big switch and the machine comes on with a long on beep and thumps. I edited it to start then. At 00:1. 8 what i suspect is the water pump comes on, though i may be wrong. That's when the gurgling starts though. The machine has a small reservoir for distilled water to moisten the airflow. A cup or two lasts several daysyou'll hear various hisses and thumps in a 15. 6 second cycle as it runs. At 03:03 i flip the big switch to shut the machine off, and it bubbles and gurgles away for the rest of the file, as water i assume slowly perculates back into the reservoir, the bubbling getting quieter and quieter until it doesn't even sound like bubbling anymore, until it finally ticks to a stop. At 03:16 you hear me step as i get my foot loose from the mic cord lol. At 04:13 the furnace shuts down as a car finishes going by outside in the bass register, faint traffic noises and the furnace being the only background noises you'll hear aside from my moving around a couple times, and a faint bluejay at the end. At about 07:00 you can barely hear the machine anymore, but i could hear a faint ticking with my own ears. At 07:04 the furnace comes back on. At 07:08 you'll hear a bluejay faintly calling outside and a car going by outside after, which finishes the file at 07:20. I edited out my walking to the computer to shut the recording down. From wikipediaoxygen concentrators typically use pressure swing adsorption technology and are used very widely for oxygen provision in healthcare applications, especially where liquid or pressurised oxygen is too dangerous or inconvenient, such as in homes or in portable clinics. Oxygen concentrators are also used to provide an economical source of oxygen in industrial processes, where they are also known as oxygen gas generators or oxygen generation plants. Oxygen concentrators utilize a molecular sieve to adsorb gasses and operate on the principle of rapid pressure swing adsorption of atmospheric nitrogen onto zeolite minerals and then venting the nitrogen. This type of adsorption system is therefore functionally a nitrogen scrubber leaving the other atmospheric gasses to pass through. This leaves oxygen as the primary gas remaining. Psa technology is a reliable and economical technique for small to mid-scale oxygen generation, with cryogenic separation more suitable at higher volumes and external delivery generally more suitable for small volumes. [1]at high pressure, the porous zeolite adsorbs large quantities of nitrogen, due to its large surface area and chemical character. After the oxygen and other free components are collected the pressure drops which allows nitrogen to desorb. An oxygen concentrator has an air compressor, two cylinders filled with zeolite pellets, a pressure equalizing reservoir, and some valves and tubes. In the first half-cycle the first cylinder receives air from the compressor, which lasts about 3 seconds. During that time the pressure in the first cylinder rises from atmospheric to about 1. 5 times normal atmospheric pressure (typically 20 psi/138 kpa gauge, or 1. 36 atmospheres absolute) and the zeolite becomes saturated with nitrogen. As the first cylinder reaches near pure oxygen (there are small amounts of argon, co2, water vapour, radon and other minor atmospheric components) in the first half-cycle, a valve opens and the oxygen enriched gas flows to the pressure equalizing reservoir, which connects to the patient's oxygen hose. At the end of the first half of the cycle, there is another valve position change so that the air from the compressor is directed to the 2nd cylinder. Pressure in the first cylinder drops as the enriched oxygen moves into the reservoir, allowing the nitrogen to be desorbed back into gas. Part way through the second half of the cycle there is another valve position change to vent the gas in the first cylinder back into the ambient atmosphere, keeping the concentration of oxygen in the pressure equalizing reservoir from falling below about 90%. The pressure in the hose delivering oxygen from the equalizing reservoir is kept steady by a pressure reducing valve. Older units cycled with a period of about 20 seconds, and supplied up to 5 litres per minute of 90+% oxygen. Since about 1999, units capable of supplying up to 10 lpm have been available.
Autor: Kbclx
00:00
29:21
Calm ambient track. Winter woods / pinewood february 12. 41 pm (noon) in the netherlands near village giersbergen. Bram’s admin request-text and my answer in audio. Hello freesounders,it happens very infrequently that i post requests. However, i have an extraordinary sad reason to do so today. I don't want to go into detail in this public forum, but someone incredibly important and incredibly young in my life and my wife's just passed away. I am thus looking for an extra long recording of a peaceful "forrest ambience" to play during the good-bye ceremony. Something with some birds and perhaps some wind through the leaves,. . . . Currently the ceremony is planned for april 6th so i would need this before then. I know i can look through freesound, but i would like something specifically recorded with this in mind, something we will be able to listen to later as well, remembering this important and sad time in our life. . . Yours in grief,- bram & familywhat you hear;general-noise; soft wind in woods, sometime a bit increasing. A far kid at the edge of hamlet giersbergen. Far hum of the woods. Remark that the far high altitude planes are on a very lo noise level. Off and on craws and woodpeckers. 00. 00-02. 18 clean background-sound02. 18-06. 57 far high altitude plane- 04. 08-05. 42 people passing06. 05- 08. 13 clean background-sound- 07. 15-08. 12 woodpecker08. 16-10. 33 far high altitude plane10. 33-11. 44 clean background-sound- 10. 44-11. 32 (far) woodpeckers11. 33-12. 53 far police serine12. 55-14. 11 clean with some far yelling kids and woodpeckers14. 15-16. 14 far high altitude plane16. 14-26. 11 clean background-sound with some friendly increasing wind gusts- 23. 06-23. 56 woodpeckers- 25. 53-26. 08 woodpecker26. 08-end far high altitude plane and people. More recordings here search: giersbergen. About the area, national park loonse en drunense duinen. (text by irma de potter,ranger of this area) dutch website: https://www. Natuurmonumenten. Nl/natuurgebieden/nationaal-park-loonse-en-drunense-duinen. In the loonse en drunense duinen you will find forest, heathland and especially a lot of sand. It is one of the largest shifting sand areas in western europe. The wind can blow undisturbed in many places, resulting in an ever-changing landscape. By purchasing it in 1921, it has been protected for 100 years and we can still enjoy this brabant sahara today. You can roam freely on the sand plain. So there is plenty of room to explore extensively. Marvel at the submerged trees, enjoy the chirping field crickets and quench your thirst at one of the many cafes or restaurants on the edge of this nature reserve. Walking, cycling or on horseback: it's all possible here. With the wind in your hair and the sand in your shoes. You may even come across the sheep herd. The sheep keep the heath short and eat away saplings. This is how they keep the area open. The loonse en drunense duinen still has 270 hectares of shifting sand. That sand creates rather extreme conditions: the soil is dry and nutrient-poor. The difference in temperature between day and night can be as much as 50 degrees celsius. This ensures a unique flora and fauna. The animals and plants have adapted or feel at home in drought, aridity and temperature fluctuations. Sand sedge and various lichens, for example. And the viviparous lizard, sandpit beetles and sand bees. All species that love sand. In the last ice age, the polar winds blew sand from the north to brabant, where it remained in thick packages. For a long time this sandy plain was covered with primeval forests. Until the fourteenth century the trees were felled by people. They used the wood as fuel. The bare plain was filled with heather, where the farmers grazed their cattle. This intensive grazing and the sod cutting of the soil depleted the soil. This gave the sand free play. For a long time, the sand was a major problem for the residents. Villages and fields threatened to disappear under it. Trees were planted to stop the advancing sand. You can still see the traces of this today: find the submerged trees that only peak above the sand hills with their crowns. Date/time: february 15th tuesday 2017, start 12. 44 pm. Weather: 13c, clear sky, wind se 2-3bft , 1023 hpa. Mic pointed ne. Location; soft-wood-forest giersbergen (drunen), national park “loonse en drunense duinen”, drunen, noord-brabant, netherlands (holland), europe geo 51. 65566 5. 15774. Gear chain: sennheiser mkh30/50 ms, in rycote cyclone small, windjammer > sound devices 302 >tascam dr-100 mk2. Low cut 140hz 6db/octave. Level around -33db for background. Decoded mid-side to stereo.
Autor: Klankbeeld
00:00
02:55
This recording was made on a warm, clear day in early june right on the sandy bank of the mississippi river -- between illinois and missouri. You hear the low, strong surge of the diesel engines as a barge slowly passes through and, what i find most enjoyable, you hear the gentle lapping of the river as the waves reach the sandy shore. You also hear various birds, including the common red-winged blackbird. Even though this recording was made around 3pm in the afternoon, you also hear a low chorus of insects adding to the relaxing summer-like ambience. A very peaceful, yet strong soundscape of a majestic natural wonder that’s been here for millennia. Recording made with the zoom h4n, using the built-in internal mics.
Autor: Kvgarlic
00:00
02:09
This sound was created as follows:. -zynaddsubfx free (and insanely amazing) software synthesizer generated simple g tone using a sine-wave adsynth engine- creative sbs 250 speakers played it back distorting the sound naturally and adding some interesting stereo phasing effects (is that caused by analog signal cable being longer for one speaker?)- i was manually changing the volume using the speaker's potentiometer (whitch is dirty and added some interesting noises on the right speaker, and also at peak loudness during the 54th second the right speaker is quiet)- the output was captured by zoom h2's rear mics- and recorded via usb into audacity free audio editing program- i exported the recording as 16-bit flac.
Autor: Unfa
00:00
06:33
For a podcast project i needed some coffee related sounds so i recorded our techni-vorm moccamaster, filter coffee machine as it brewed a full pot. Our version has a metallic thermos jug rather than the standard glass jug. This recording was made using a sound devices mixpre6ii and a stereo pair of fel em172 mics. Low cut on the sd which in basic mode is 80hz (i think). There is no processing to this recording other than to ‘normalize’ the levels. I do not require any credit or attribution. If any of these sounds have been of help, and you are feeling charitable, please do consider donating to freesound to help keep the site running (a link is also on the home page). Any donations are greatly appreciated!.
Autor: Walthamstow Walker
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