750 Royalty-Free Audio Tracks for "System"

A complete trip on métro (subway) line 9 of the paris subway system, from the alma-marceau station to the havre-caumartin station. Starts with descent into the métro station and ends climbing up the steps back out at the destination. One train is allowed to pass, at about the 1-minute mark, as we wait on the platform, and an announcement giving the times for the next trains can be heard. The ride on the following train begins at around the 2-minute mark. There are two loud sounds between about 9:10 and 9:20 and some loud low-frequency wind noise at around 10:40 (as we leave the métro station and return outside), so beware. Recording with zoom h4n, originally 96 khz/24 bits, uploaded as mp3 320 kbps because the wav was so big (almost 500 mb).

Hi guys, i'm back. For years i haven't uploaded any sounds except my news themes, (thanks to you for your nice comments and thousands of downloads)now i give you an impulse response i made to check how my mixes would sound on a typical living room audio setup (but listening with headphones). The chain: technics hifi-system, multi-cone speakers, audix reference microphone, focusrite preamps. To use it like intended, just load this file into a convolution plugin in your master insert. You'll hear your mix like sitting. . . Well. . . In my living room. It'll sound muffled to you, that's because i captured the ir and all the reflections with an omni-directional mic and i have thick curtains ;-dof course it can be used as a really, really nice and natural-sounding ambience ir, too. Use it as an aux-reverb).

Three sounds. 1) analog systems rs-40 samples from 25hz bipolar lfo (doepfer a-147-2)2) analog systems rs-40 samples from 25hz looping envelope (intellijel quadra)3) analog systems rs-40 samples from noise generated by barton musical circuits bmc23 decaying analog noise).

Keycap clicks 1 cherry mx clear switchmechanical keyboard clicking. Different keyscherry mx clear mechanical switchesthe cherry mx clear switch is a medium stiff, tactile, non-clicky mechanical keyboard switch in the cherry mx family. The slider is not actually clear but colourless (in effect, translucent white). The word clear is cherry's own designation to distinguish it from the older cherry mx white which is a clicky switch. Older types of the "white" also have translucent white sliders and are therefore visually indistinguishable from clears. The cherry mx tactile grey switch is used for space bars in keyboards with cherry mx clear switches. It has a similarly-shaped stem but a stiffer spring. Mx clear is reported to have first appeared in 1989; however, it was included in a march 1988 numbering system datasheet for mx switches so it is assumed to have been in production in 1988 or earlier. (from https://deskthority. Net/wiki/cherry_mx_clear)cherry mx clear, key, keycaps, keyboard, clicks, clicking, mechanical keyboard, mechanical switches,.

Disclaimer: this may be loud. Check your volume. This sound is an experiment i did for a short film my crew and i are working on. I wanted to see if i could make a warning effect like the civil defense messages that play on the radio for storms and other emergencies, so i recorded my voice, and pitched it down, equalized it, put it through a high pass filter and lo and behold, i think it sounds pretty darn close. I then coupled it with a couple alert tones from my local noaa / nssl station and this sound was born. This effect could be used for an apocalyptic scenario or civil unrest, riots, looting, or anything else you desire. Not required, but it would be cool to hear if you use it for anything. Enjoy!.

Vigorous picked bass sound. Preset #4 from bassesland vsti software. Notes starting from c5 produce harmonics. Http://syntheway. Com/bassesland. Htm. Bassesland is a virtual bass software that covers a wide range of sounds, from an electric bass guitar or an acoustic double bass, to the vintage bass synthesizers. Features. - rotary switch selector to change between the following basses:. 01 electro acoustic bass02 fretless electric bass03 jazz electric bass04 fingered bass and harmonics05 picked bass and harmonics06 muted bass and harmonics07 slapped electric bass08 bass slides (glissandos)09 fuzz bass overdrive10 minimoog sub-bass11 moog prodigy bass12 moog system 55 modular synth13 moog taurus pedal preset14 moog taurus bass pedal preset15 roland jx-3p juicy funk16 roland jx-8p synth bass17 roland juno-106 fat bass18 clavia nord lead acid bass19 oberheim ob-xa buzz bass20 arp 2600 bass (arp instruments, inc)21 oscar bass (oxford synthesiser company)22 kawai k3 resonance bass23 upright bass (acoustic double bass)24 upright bass pizzicato.

A degraded alert signal transmission from a long lost civilization in the depths of space, or are they?.

This is my impression of a flatulent arachnid, or "spider fart" which if referenced by a woman in an old-timey southern mansion, might be pronounced as "spidah-faht". This seemingly odd spelling and like-wise pronunciation, perhaps worthy of explanation, would be on account of their ". . . Well known and often satirized dropping of "r's" in times when they precede another consonant or pause, which has the effect of elongating the pronounciation of the vowel before it. " as ray kooyenga explains it. Delving deeper, according to j. Fought who seems to agree, this was a originally a "southern english dialect associated with priveledge and prestigem" and in certain geographies of the southern and south eastern united states migrants "clung to such speech through its association with the influential proprietors of the southern plantation agricultural system. ". The use in "faht" has also another common southern linguistic trait of what the preceding gentleman might term a "confederate a". And so this, is the "spidah-faht" or "spider fart" if you prefer, as performed by ray anthony mimicking the fairly common species "arachnid flatulence gigantous".

This intro was produced for the german "grinkenschmidter winterfest 2018" show and is now available for you. Text:ladies and gentlemen - may i have your attention please!the show starts in ten - nine - eight - seven - six - five - four - three - two - one - go. -----------------------------------------------due to recent events i would like to share this statement with you:no, i did not sold this countdown sample. It was - and of course still is - cc0 licenced and you are allowed to use it anywhere. If you receive a copyright claim from youtube or someone else this is generally because people used it in their productions and distributed them commercialy, which is ok, because this sample is cc0 licenced. But the "content id scanning system" of youtube thinks by mistake that the distributor is the exclusive copyright holder of that sample/track. Such systems are prone to errors and will probably never work perfect. . . If you run into such issue, please dispute the copyright claim and refer to this sample on freesound. Org and the cc0 licence:http://creativecommons. Org/publicdomain/zero/1. 0/. Regarding to all my sounds you are really safe when you do this and if you require any further assistance please do not hesitate to contact me!. You can find more information here:https://freesound. Org/help/faq/#a-freesound-sound-i-used-in-a-youtube-video-got-copyright-claimed-what-should-i-do-----------------------------------------------.

I used audacity to synthesize the five-tone chime made by the montreal metro's jeumont train element 41. Backstory: the train itself was an mr-63 type train modified by canron circa 1971, adding a current chopper to the train's started system. The chopper produced an 'idle' tone at around 45 hz, and as the train departed, five tones at frequencies of 90, 120, 180, 240, and 360 hz. Originally there were 3 'elements' (a set of 2 motor cars and 1 trailer car) with the jeumont-schneider current chopper (element 40, made up of cars 81-579, 80-040, and 81-580; element 41, made up of cars 81-581, 80-041, and 81-582; and element 42, made up of cars 81-583, 80-042, and 81-584). During the early 2000s refurbishments, element 40 was retired from service to provide spare parts for the other elements, which were then connected with elements of 'normal' mr-63 trains. Only the 81-579 car remains from element 40. Element 41 and element 42 were then retired in 2018 when the other mr-63 trains were retired.

As with my other sounds, i prefer quality over quantity. Here is another sound file that i developed over a couple of days. Similar to ss's pulse cannons, this one features a military battle featuring tanks, helicopters, jets, and strafing runs using high caliber chainguns. A lot of explosions and rocket fire is heard as well, and the audio is a bit loud. Sounds edited in audacity, some sounds recorded irl using my dslr camera system, the mixing was done using filmora9. The freesound files used is listed in the sound sources, rest is what i used online and irl. I did this out of boredom while playing shooter games, since i'm working with 3d modeling i'm getting back into making my own sounds for my games. This one is free to use with credit, and with the right editing software you can change the volume if needed. Feel free to let me know if anything needs changing, or if you want a audio commission!. <3. [the quality in freesound's website player doesn't fully show the amount of audio details. It'll clear up and have much more depth when downloaded. ].

This sound is a 1-sample long impulse at 48 khz. It covers the whole frequency range with equal power. This is a perfect sample for exciting your guitar amp or reverb unit to capture it's impulse response (ir). You can also play it through a speaker in a reverbant room to capture it's reverb characteristics. Remember that the ir sample will be no flatter than your speaker's performance multiplied by your microphone's performance (frequency response characteristics). The sample has exaclty 1 second of silence, then the impulse, then another second of silence to ensure the impulse will be played clean and untruncated on any sound system or device. My test with ir lv2 convolution plugin have proven, that this sample has absolutely flat frequency response - convolved signal was identical to the source signal. After normalization and sample-alignment of the sound clips i have inverted the polarisatin of one of them and summed them - result was absolute silence, even no hiss was present as a result. This shows the accuracy of the convolution process and proves this sound to be perfect for sampling ir. The impusle was generated with c* dirac ladspa plugin. Created using audacity.

One By One performed by Systems Go of the United States Air Force Band of Flight. Track 4 from Holding the Flag (2007).

Family performed by Systems Go of the United States Air Force Band of Flight. Track 7 from Holding the Flag (2007).[1]

Tibetan bells and sounds from outer space,a pathway to inner peace. Sounds for relaxation and meditation. 289,4 hz is attributed to mars, 841,68 hz is frequency of synodic moon. Hello,this is the very real horst from duisburg germany with another soundpiece of tibetan singing bowl attributed to planets of our solar system. The sounds of mars/synodic moon, were taken by me on february 25th, 2014 also as a modul used in our soundproject "tibetan bells and sounds from outer space" at youtube-channel :https://www. Youtube. Com/user/taochisoundthe singing bowl has frequency of mars/synodic moon [grundton: mars 289,4 hz / synodic moon 841,68 hz; durchmesser ca. 170 mm; höhe ca. 80 mm; gewicht ca. 790 gramm] and was treated with different mallets [drumsticks]. For more information about frequencies of the planets, please visit:. Http://www. Planetware. De/tune_in/frequenz. Htmlhttp://wiki. Astro. Com/astrowiki/de/planetenton. I share three excerpts of these pieces of 03 min, 07,45 min and variation with stretched sound 3,07 min here for you for your free usefor more information about tibetan singing bowls please visit:http://en. Wikipedia. Org/wiki/singing_bowlthanks for listening andfind true peace on your waythe very real horst. .

Flyin' High performed by Systems Go of the United States Air Force Band of Flight. Track 2 from Holding the Flag (2007).[1]

Eurasian nuthatch and ring necked parakeetfog lane park, manchester, ukom systems ls-p5.

Holding the Flag performed by Systems Go of the United States Air Force Band of Flight. Track 1 from Holding the Flag (2007).[1]

Desert Storm Blues performed by Systems Go of the United States Air Force Band of Flight. Track 10 from Holding the Flag (2007).[1]

Here in My Heart performed by Systems Go of the United States Air Force Band of Flight. Track 3 from Holding the Flag (2007).

4th Street Exit performed by Systems Go of the United States Air Force Band of Flight. Track 9 from Holding the Flag (2007).[1]

Wait Till the Storm Is Over performed by Systems Go of the United States Air Force Band of Flight. Track 5 from Holding the Flag (2007).[1]

Two small connected feedback systems playing for you.

Let the Music Send Me performed by Systems Go of the United States Air Force Band of Flight. Track 6 from Holding the Flag (2007).[1]

1st attempt at birdsong recording. Fog lane park, manchester, uk. Om systems ls-p5great tit and ring-necked parakeet.

Urinal being flushed in an empty, midsized building bathroom. The lights are off so there is no hum from the ventilation or lighting systems.

I made this bass drum using one of the glass hit samples i found on this website. Sounds nice on big sound systems, may destroy smaller ones.

This is the sound of pliers from ubica lab (upf). Their research areas are enclosed within the general disciplines of ubiquitous computing, contextual intelligence and cognitive systems, using sensors and radiofrequency identificaiton (rfid).

Sound of the timer used for a board game, similar to an egg timer. Stereo miktek c5s at 3 inches, true systems p2, lynx aurora, in iso booth. . . 48ksps 24 bit.

Mixture of electronic and mechanical siren systems from three neighbouring cities during a tornado warning in eastern iowa. The wind hadn't really picked up yet but there is quite a bit of rain. Eerie yet relaxing.

This is the sound of a tape measure from ubica lab (upf). Their research areas are enclosed within the general disciplines of ubiquitous computing, contextual intelligence and cognitive systems, using sensors and radiofrequency identificaiton (rfid).

A small test i did to see if i can emulate many games' futuristic computerized voice ui systems. 1st is a (terrible) pseudo british accent, second my regular voice modified, and third a heavily modified robotic sounding voice.

This is the sound of a toolbox full of diverse tools at ubica lab (upf). Their research areas are enclosed within the general disciplines of ubiquitous computing, contextual intelligence and cognitive systems, using sensors and radiofrequency identificaiton (rfid).

Early morning backyard ambience in virginia usa. White noise including distant traffic and the din of air conditioning systems with bird song and a couple of crows calling to each other. Recorded on an olympus ls-7 pcm recorder.

I have started to read a certain book written by allen strange, "electronic music: systems, techniques, and controls". It's about time i dig into it. Probably it will result in some sounds. . .

This is the sound of a knob used to adjust robot features at ubica lab (upf). Their research areas are enclosed within the general disciplines of ubiquitous computing, contextual intelligence and cognitive systems, using sensors and radiofrequency identificaiton (rfid).

molly was the name of the female voice prompt personality on the blue violet vmx voice mail systems when this "good-bye" was recorded at hewlett-packard in 1993 using a macintosh se-30 and an farralon macrecorder.

It's hard to find a good doppler scream and harder to make the effect in sound editing systems. Here's a few falling scream varieties. Just toy with the pitch and you make a variety of plummeting people. Recorded at home on a phone recorder.

Yep this is a crazy sound. What have i done. . . I have build a nonlinearcircuits sloth lfo. Https://www. Modulargrid. Net/e/nonlinearcircuits-sloth-4hpedited info:i have built the regular version. The sloth has two outputs x and y. I connected x to control frequency on one oscillator and y to control amplitude on another oscillator. Frequency experiment on left channel. Amplitude experiment on the right. The file starts as the amplitude is 0. Next time the amplitude is 0 (almost) is at about 48 sec. Then 48 sec later, at 1:37 the amplitude is 0 again. The two cycles are not identical. The tones are harder to analyze. . . X and y outputs. I guess those corresponds to x and y in a coordinate system. You can find video clips watching the sloth “drawing” butterfly wings. For example:https://www. Youtube. Com/watch?v=0ku6npz1s4gand maybe check this:https://www. Youtube. Com/watch?v=occhcm5oxp8http://nonlinearcircuits. Blogspot. Se/2014/09/sloth-chaos. Htmlthis later link is the developers page. The constructor (andrew) of this module says that my version completes “1 cycle every 15 seconds”. What does that mean? is one cycle one lap in the butterfly pattern? will the pattern repeat itself? yep, i’m going to ask him…. Edit:andrew answers my questions: “it is a very approximate description of the frequency, cycle is not the proper term to use. . . . Nor is frequency really, but they are descriptions that people can relate to easily. Depending upon the pot settings and whatever other initial conditions that happen to be in place, the signal may traverse the typical double strange attractor path. It may stay in one attractor for several loops before crossing over to the other one. The pattern will never repeats itself, it might come close but won't do it. ”my question: so, one “loop” is one cycle?andrew answers: typically it takes approx 15 seconds to make a rough figure 8, but depending upon the pot and other factors, it may take longer, much longer, sometimes it even pauses whilst deciding which way to go next.

This is the audible annunciation found at all intersections with traffic lights in paris, france. It announces the condition of the traffic lights for pedestrians who are blind or with impaired vision. The annunciation is turned on by pressing a button on the traffic light pole. When the crosswalk sign is red (do not cross), the recorded annunciation is always "rouge piéton" ("red light, pedestrian"), followed by the name of the street that the crosswalk crosses (in this case "rue d'antin," the quiet side street where i recorded this). This repeats over and over until the crosswalk changes to green, at which point there is a two-second trill tone followed by a repeating bell tone. The bell tone is one bell, followed by two bells, repeated four times, followed by a very brief pause, and then the sequence is repeated again. This continues until the crosswalk changes back to red, at which point the "rouge piéton" message resumes. The annunciation continues for at least one cycle of the traffic lights and then stops, unless the button is pressed again. The audio quality of the annunciation is very poor even in real life (it sounds like a wax cylinder recording or something), and can be difficult to understand. This recording accurately captures the poor quality of the annunciation. The volume of the annunciation is also adjusted dynamically based on ambient noise, so there is a slight change in volume on this recording as the system apparently reacts to noise from traffic or something. There is a weak background noise that sounds like some sort of machine, but it wasn't coming from the traffic light and i don't know the source. The recording starts with the crosswalk red, then at about 18. 3 seconds it changes to green, then it changes back to red at about 53 seconds. A car passes at around 48 seconds. Recorded with a zoom h4n, stereo 96 khz / 24 bits, built-in mics, from about ten inches below the tiny speaker in the crosswalk sign housing.

This is the sound produced by a voltmeter when it detects that there is electrical continuity. This tool is used at ubica lab (upf). Their research areas are enclosed within the general disciplines of ubiquitous computing, contextual intelligence and cognitive systems, using sensors and radiofrequency identificaiton (rfid).

I get this call from my daughter's elementary school, first week of school and already a cyber attack, messing up the entire school's computer systems. It is indeed a sad world where not even grade school kids are safe from these cyber pirates. So i tweaked the recording a bit, added panned out echo and noise reductio. Enjoy!.

The apple plaintalk microphone jack used on some older macintosh systems is designed to accept an extended 3. 5 mm three-conductor phone connector; in this case, the tip carries power for a preamplifier inside the microphone. The sound a rather fast repeating beat i made using an apple plaintalk microphone in a rather modern windows laptop using audacity. I messed around with the jack, and took out all the silent parts.

Here's my second flute reel for the make noise morhpagene. This is how far i've came over the past few months in my playing and despite a few slip ups here and there i'm quite pleased with how i'm able to make it sound now. Would love to hear what people do with these samples as it is quite humbling to know my playing is in people's modular systems across the globe.

Dialling the number 0 on an old rotary phone. This recording has a slight pause inbetween dialling, and letting go, allowing for more freedom to tweak the timing yourself. Click here for the rest of my rotary phone samples. For those that need it, below is a diagram showing both the european (inner numbers), and american (outer numbers) numbering systems. The highlighted numbers is the current recorded sound. Audio filename follows american type (outer numbers on diagram, from 1 to 0). .

A few cycles of my dad's home oxygen machine with a ticking battery operated clock in the background recorded in the early morning in the living room with lifecam hd3000 webcam at the end of about 16 feet of usb cable dragged out of my bedroom. He's about 6 feet away, i was with my back to the room with my camera pointed at my chest so he wouldn't think i was filming. It would seem this is the first and only oxygen machine on freesound. A full cycle seems to last from between 7 to 10 seconds. 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.

It becomes clear when i record with audacity and can actually see the attack and decay. I’m playing with alm pip slope. With this module you can cv control the attack and decay. As oscillator i use intellijel μvcf in self-oscillation mode. I fm-modulate this filter/oscillator with a tone from uoki-toki polivoks vcf. The semi random trigger is really two triggers connected to an or gate. Pitch is from analogue systems rs-40 (sample/hold and noise). I can listen to this for a looong time. Retro sound.

Version 2. . . Of https://www. Freesound. Org/people/gis_sweden/sounds/352940/. . . Or maybe version 34. . . . It's not better but a little different. More dynamics. Softer. But still i have the clicks :-/have to work on that. It becomes clear when i record with audacity and can actually see the attack and decay. I’m playing with alm pip slope. With this module you can cv control the attack and decay. As oscillator i use intellijel μvcf in self-oscillation mode. I fm-modulate this filter/oscillator with a tone from uoki-toki polivoks vcf. The semi random trigger is really two triggers connected to an or gate. Pitch is from analogue systems rs-40 (sample/hold and noise). I can listen to this for a looong time. Retro sound.

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.

What i hear in this sound is a crashing starship as you regain consciousness surrounded by chaos of the crew and emergency systems. At 00:52 there's a really cool explosion hit that fits the starship in danger vibe. Created from roughly 230 sounds in reaper by looping, batch actions and modulated filtering. All sounds came from a folder of freesound cc0 sounds i've been collecting. Here is the file list if you are curious:. 103117__geronimo83__elephant. Mp3107216__keithpeter__birmingham-botanical-gardens-mains-hum-from-tannoy. Wav110456__sagetyrtle__wings-121110. Wav116395__dean-raul-diarchangeli__tv-static. Wav120107__toc1__bird-wings. Aiff132843__cactus2003__creepy-ambience-background. Wav135506__chriddof__heavenly-computer. Wav138156__triad__hair-clippers-2. Wav14102__adcbicycle__15. Wav145094__crashoverride61088__whoosh-and-vacuum. Wav146957__zabuhailo__systemload. Wav151641__jamesmontour__8mm-film-camera. Aiff152317__logos-chroma__arp-odyssey-wind. Flac152455__dayvonjersen__long-sweep. Wav153277__gerardcatala__beating-wings-of-a-pigeon. Wav155800__mario1298__elevator-the-sixth-floor. Wav162493__tasmanianpower__vinyl-rewind. Wav165486__venaportae__wild-bees. Wav170761__esperar__bees. Mp3174278__voluntaryzonkey__horror-film-beep-sound. Mp3174718__paespedro__single-water-drop. Wav178995__beatproduction__emotional-string. Wav182110__qubodup__film-countdown. Flac187373__shapeshifterd__wee. Wav188197__splicesound__tv-television-on-off. Wav188388__wubitog__mid-high-tone-button-click. Wav192155__hitrison__picking-at-a-giant-fan. Flac194304__jmbphilmes__factory-machine-01. Wav19433__heigh-hoo__drumroll. Aiff195260__kayceemixer__fx-drone-kc-low-tone-mech-drone-pulse-tlspc-02. Wav198818__yuval__butterfly-wings. Wav202876__augustsandberg__african-savanna-2. Wav204725__dneproman__trailer-end-4. Wav211870__tubbers__airplane-flyover. Mp3234524__foolboymedia__notification-up-1. Wav235845__hermengarde__cartoon-spin. 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Mp3382948__prim-ordial__blips-and-bloops. Wav383654__deleted-user-7146007__electricity. Wav386706__tommy-mooney__wings-flapping. Wav387551__stair__sweep. Wav387904__bajko__sfx-water-drops. Wav389633__stubb__wing-flap-2 (1). Wav389633__stubb__wing-flap-2. Wav389634__stubb__wing-flap-1 (1). Wav389634__stubb__wing-flap-1. Wav394673__ihitokage__scary-old-rusty-gate-squeaking. Ogg395242__digpro120__wings-flapping. Mp3396678__dbspin__quiet-berlin-cafe-1. Wav397082__relwin__digitalradio-noise1. Wav398274__flashtrauma__electricity. Wav402781__funwithsound__butterfly-wings-fluttering-1. Wav403934__mastermind76__car-indicator-toyota-aygo. Wav406924__kyles__botanical-gardens-park-tropical-jungle-birds-crickets-flies-open-air-tone-entebbe-uganda-africa-2016. Wav408592__miguelab1998__2-beating-of-wings. Wav411651__evanjones4__film-for-a-music. Wav412025__zachrau__typing-message-on-a-mobile-phone. Wav412145__stefan021__film-projector-long-run-with-finish. 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Wav459983__florianreichelt__rain-water-dripping-softly. Mp3462462__soojay__seagulls-gaviotas-clean-wildtrack. Wav462889__mycompasstv__frogs-croaking-crickets-at-night-in-jungle-swamp-africa. Mp3462958__bastianhallo__cartoon-jump. Wav462959__lizapenelope__cafe-sounds. M4a464496__kaygrum__river. Wav468164__wintuh__36-corriendomadera. Wav468240__cristian-vogel__bees-around-flowers. Aiff477643__richwise__foggy-morning-at-weston-shore. Wav478306__magmi-soundtracks__creepy-classical-music-01. Wav479050__nuncaconoci__rusty-hatch. Wav484157__tempermode__fluorescent-light-flickering-1. Wav489999__deleted-user-8803593__elevator-music. Wav492378__nicknamelarry__spaceship-take-off-sound-effect. Wav494497__pianofarm__farm-summer-ambience-07-09-2019. M4a495656__aunrea__dog-whimper-1. Wav495711__tosha73__strange-digital-noise-003. Wav495712__tosha73__strange-digital-noise-002. Wav495713__tosha73__strange-digital-noise-001. Wav495795__priesjensen__car-driving-ambience. Wav500146__phonoflora__foghorn. 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Flac529031__szegvari__storm-cave-reverb-fantasy-field-recording-200726-0021-01-01. Wav530078__snail-legs__flapping. Ogg531482__nataliabm09__oven. Wav533146__mattfinarelli__drop-water. Mp3535211__anaponce__typing. M4a541506__se2001__cartoon-quick-zip. Wav541606__d4xx__stir-mug. Wav541664__mamie-wilhelm__mamie-gibberish-2. M4a541796__zoshp__telephone-ringing-digital. Wav543111__clusman__bird-flapping-5. Wav544260__walthamstow-walker__a-bit-like-a-film-projector. Wav545611__bandslam33__wings-03. Wav545613__bandslam33__wings-04. Wav547016__neopolitansixth__classic-computing-sound. Wav551748__jpbillingsleyjr__finger-banging. Aiff65428__gumballrimpoche__glitchys. Wav69570__bidone__lion-loud. Mp382610__indigosierra__scribble. Mp385568__joelaudio__dragon-roar. Wav87785__graygaffer__ferry. Wav91555__polymorpheva__inside-tangara-syd. Mp391919__filipe-chagas__water-lapping-rocky-beach-ambiance. Wav93337__polymorpheva__cicadas-rbg. Wav.