267 Royalty-Free Audio Tracks for "Direct Recording"

00:00
07:58
Hark, the Herald Angels Sing performed by the Airmen of Note of the United States Air Force Band. Track 4 from A Holiday Note From Home (2005). Recorded June 20-24 & July 7, 2005 at Bias Studios. Credits: Alto Saxophone [Jazz] – MSgt Andy Axelrad* Alto Saxophone [Lead] – TSgt Lucas Munce* Artwork [Cover] – Stewart Andrews Baritone Saxophone – TSgt Doug Morgan* Bass – CMSgt Paul Henry* Bass Trombone – CMSgt Dudley Hinote* Cello – MSgt Frank McKinster*, MSgt Vivian Podgainy* Directed By – SMCgt Joe Jackson* Directed By [Assistant] – MSgt Rich Sigler* Double Bass – MSgt William Hones* Drums – TSgt Dennis Hoffmann* Edited By – MSgt Alan Baylock*, SMSgt Joe Jackson*, MSgt Rich Sigler* Engineer – Bob Dawson Guitar – TSgt Geoff Reecer* Management – CMSgt Dudley Hinote* Management, Directed By [Strings] – CMSgt Jane Bockenek* Mastered By – Charlie Pilzer Mixed By – MSgt Alan Baylock*, SMSgt Joe Jackson*, MSgt Rich Sigler* Percussion – SMSgt Pat Shrieves* Photography By – A1C Rusti Caraker*, Thomas Devins Piano – MSgt Steve Erickson* Producer – SMSgt Joe Jackson* Producer [Assistant] – MSgt Alan Baylock* Strings – The United States Air Force Strings Tenor Saxophone [Jazz] – MSgt David Stump* Tenor Saxophone [Lead] – TSgt Tedd Baker* Trombone [Jazz] – TSgt Ben Patterson*, MSgt Jeff Martin* Trombone [Lead] – SMSgt Joe Jackson* Trumpet [Assistant Lead] – MSgt Kevin Burns* Trumpet [Jazz] – MSgt Rich Sigler*, MSgt Tim Leahey* Trumpet [Lead] – TSgt Brian MacDonald* Viola – TSgt Bryce Bunner*, SMSgt Paul Swantek*, MSgt Sharon Bingham Wolfolk*, TSgt Wayne Graham*, TSgt William Hurd* Violin – MSgt Alexander Dean*, MSgt Cleveland Chandler*, SMSgt Deborah Volker*, TSgt Emily Barnes*, TSgt Gregory Pinney*, TSgt Henry Tyszler*, CMSgt Jane Bockenek*, TSgt Luke Wedge*, TSgt Mari Uehara*, TSgt Mark Dorosheff*, TSgt Mark Helm*, SMSgt William Tortolano* Vocals – TSgt Paige Wroble*
Author: Composition: Felix Mendelssohn; Arrangement: TSgt Ben Patterson; Performance: United States Air Force Band, Airmen of Note; Recording: United States Air Force
00:00
07:33
Go Tell It on the Mountain performed by the Airmen of Note of the United States Air Force Band. Track 19 from A Holiday Sampler (2009). Track 1 from A Holiday Note From Home (2005). Recorded June 20-24 & July 7, 2005 at Bias Studios. Credits: Alto Saxophone [Jazz] – MSgt Andy Axelrad* Alto Saxophone [Lead] – TSgt Lucas Munce* Artwork [Cover] – Stewart Andrews Baritone Saxophone – TSgt Doug Morgan* Bass – CMSgt Paul Henry* Bass Trombone – CMSgt Dudley Hinote* Cello – MSgt Frank McKinster*, MSgt Vivian Podgainy* Directed By – SMCgt Joe Jackson* Directed By [Assistant] – MSgt Rich Sigler* Double Bass – MSgt William Hones* Drums – TSgt Dennis Hoffmann* Edited By – MSgt Alan Baylock*, SMSgt Joe Jackson*, MSgt Rich Sigler* Engineer – Bob Dawson Guitar – TSgt Geoff Reecer* Management – CMSgt Dudley Hinote* Management, Directed By [Strings] – CMSgt Jane Bockenek* Mastered By – Charlie Pilzer Mixed By – MSgt Alan Baylock*, SMSgt Joe Jackson*, MSgt Rich Sigler* Percussion – SMSgt Pat Shrieves* Photography By – A1C Rusti Caraker*, Thomas Devins Piano – MSgt Steve Erickson* Producer – SMSgt Joe Jackson* Producer [Assistant] – MSgt Alan Baylock* Strings – The United States Air Force Strings Tenor Saxophone [Jazz] – MSgt David Stump* Tenor Saxophone [Lead] – TSgt Tedd Baker* Trombone [Jazz] – TSgt Ben Patterson*, MSgt Jeff Martin* Trombone [Lead] – SMSgt Joe Jackson* Trumpet [Assistant Lead] – MSgt Kevin Burns* Trumpet [Jazz] – MSgt Rich Sigler*, MSgt Tim Leahey* Trumpet [Lead] – TSgt Brian MacDonald* Viola – TSgt Bryce Bunner*, SMSgt Paul Swantek*, MSgt Sharon Bingham Wolfolk*, TSgt Wayne Graham*, TSgt William Hurd* Violin – MSgt Alexander Dean*, MSgt Cleveland Chandler*, SMSgt Deborah Volker*, TSgt Emily Barnes*, TSgt Gregory Pinney*, TSgt Henry Tyszler*, CMSgt Jane Bockenek*, TSgt Luke Wedge*, TSgt Mari Uehara*, TSgt Mark Dorosheff*, TSgt Mark Helm*, SMSgt William Tortolano* Vocals – TSgt Paige Wroble*
Author: Composition: traditional; Arrangement: MSgt Alan Baylock; Performance: United States Air Force Band, Airmen of Note; Recording: United States Air Force
00:00
01:28
This racing vehicles recording 2 track. It might be viable for use in racing and driving video games. But over the past few years, games emerged as some of the top-selling products in video and computer gaming. The main focus in such a project would be on generating a score by merging a few sounds in the background of the soundtrack (such as bumping or breaking) with specific vehicle sound effects (such as braking). Loops would be used to affect pre-composed music, using live data to change the mix and instrumental direction (such as the dynamics, texture or timbre), or even the pitch, rhythm or tempo), moreover, the musical soundtrack for racing vehicle gameplay could be stored in a memory card to use in digital sport car sounds unit that convenient sound effects according to the processes, which is essential to participate in the training driver by granting the user with more information. In real life, the driver has more sensory information.
Author: Kurd
00:00
18:07
(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. Wow, this is a long one. . . But a good one. Let me set the scene for this audio because i am a nerd. . . Burbank, california. A large apartment/condominium complex with an open courtyard and a swimming pool and hot tub. Now, for some reason in la, nobody ever seems to actually use pools or hot tubs anymore so it's not hard to get clean audio. So, from beginning to end you will basically hear me turn the automatic shutoff dial on the wall, walk to the hot tub, get in the hot tub, and sit in various positions for extended periods of time. I was alone for the entire experience (wife was at work) and nobody joined. It's very clean audio and safe for all production. Recorded on 11/20/2018 in burbank, ca. Enjoy,. Christopher c. Courter.
Author: Courter
00:00
00:54
(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. The amtrak pacific surfliner winds it'd way up and down the pacific coast coast. This train is known for spectacular coastal views. Here you can hear this high-speed train come screaming through burbank's downtown station (traffic can be heard on i-5 in the distance). You will hear a security guard walk behind me just before the train comes through. He was one of our trusty transpo officers making sure i wasn't up to no good with my zoomh4n device. Thanks for keeping us all safe officers!. The train makes a pass from right to left and i kept recording so you would have some room-tone at the tail. Enjoy!. Christopher c. Courter.
Author: Courter
00:00
04:19
I tried out some new gear and methods! more mountainside rain! a complete storm from beginning to end with swelling and then waning rainfall, occasional thunder. Ms stereo bar on mic stand projected through open second-floor window, just under the roof eaves. Recorded july 20th during one of the mid-afternoon brief intense storms we can seem to get frequently in the rocky mountain foothills beginning around june. If you were listening and wondering, the direct sound of the thunder is somewhat occluded as i believe the storm was behind the overhanging roof and house from the perspective of the microphone array. The mountainous terrain and other objects in the field reflected some of that thunderclap, as well as the exterior wall of the home, and so this is all a little bit funky. Mid-side stereo recording:large diaphragm condensers mounted on octavia stereo mic mounting bar:akg perception 220 mid (cardiod) (on top, upside-down)akg perception 400 side (in bidirectional mode) (on bottom, facing left)sound devices mixpre-6 preamp+mixer+recorder (ch1+2 paired to ms stereo, gain @ +21db, fader @ unity, balance at mid/side center) w/48vdc phantom power applied, on-board mid-side encoding and monitoring in l+r, 24/96khz stereo recording. Postprocessing:cooledit 2000: edited to excerpt from longer recording. Normalized recording to 0db. Downsampled to 16bit 48khz. Flac: encoded.
Author: Chromakei
00:00
00:56
One of the most haunting sounds that i have ever captured. I got on the bus one day and didn't notice anyone on there when i sat down, and then a few moments later, i started hearing this sound. I was confused as to what to do. Do i turn around and look at this laugh-er in the face? what would a person laughing like this do to me if i looked at them? how could a person even laugh like this? it doesn't sound physically possible. As more and more people got on the bus, i saw nobody looking in his direction either. Am i maybe imagining this sound? is there a tiny many laughing in my head?. Upon leaving the bus, i looked back and couldn't tell who must have made the sound, but regardless, it still literally shakes me a bit hearing this audio. . . . Recorded with an android phone and edited in audacity.
Author: Fairhavencollection
00:00
01:47
A recording of a manual typewriter. The author is inserting paper, typing a paragraph, and then removing the paper. Sound of paper being inserted into the typewriter using the paper platen winder. Then the sound of typing of about 50 words. A small bell sound is heard at the end of each line, then the sound of the platen being pushed back to start the next line, and the platen moving the paper up one line. The sample ends with the sound of the paper being wound through the typewriter and removed. I have tried to avoid clipping of each typed letter. There is a lot of percussive multi pitch sound in each typed letter. There is a mechanical escapement that provides a clicking sound as the platen is moved back for the next line. This sample was recorded direct to the hard drive of this samsung nc10 netbook using audacity set to 44. 1khz and 16 bit in mono. A dynamic microphone was used on a small desk stand about 1 foot (30cm) from the typewriter, the stand being on a different table to the one on which the typewriter was used. The microphone was a fairly cheap make (hitachi hmp606) and was pre-amplified using a maycom mictube preamplifier built into the xlr connector, connected to the mic in port of the samsung nc10 netbook. The mic boost was reduced to zero, and the gain of the maycom preamp was at its lowest setting.
Author: Keithpeter
00:00
08:19
Scheherazade, Symphonic Suite, Op. 35. The San Francisco Symphony Orchestra conducted by Pierre Monteux. Violin solo by Naoum Blinder. Recorded March 3 & 4, 1942 in the War Memorial Opera House in San Francisco. Victor DM-920. Transferred and restored from the original 78 set. La suite symphonique Shéhérazade Shéhérazade , de Nikolai Rimsky-Korsakov, Op. 35: I. La mer et le vaisseau de Simbad, interprétée par l'orchestre symphonique de San Francisco dirigé par Pierre Montreux avec Naoum Blinder en premier violon. Enregistrement des 3 et 4 mars 1942 à l'opéra du Mémorial de la Guerre à San Francisco.
Author: Untitled
00:00
75:42
Hi. This soundfile was recorded on 03. 06. 2017 in szczecin, nw poland (gumience district to be precise). The time of this recording is from around 3 a. M. (when the sun was allready rising) till around 7:30 a. M. What's funny about that, is that i turned my recorder on and layed it on the windowsill (display up) on altitude around 5 meters (first floor), (the recorder is facing ne direction) because the birds were allready going crazy!, and after some time i felt asleep, and the recorder was left on. There are many many kinds of birds around, cause there is a big cementery near by, with lots of trees, and some wild fruit orchard too. I had this one moment, when the birds were so active, that let's say they spinned it me around, and worked me up to a beautifull spiritual moment with their sounds, and then i felt asleep. Later through the recording you can hear me snoring, you can hear my alarm clock going on (and that haven't woken me up too;). The bass resonance of cars passing by makes this recording a bit heavy in some places, and the wind made it's mark too, but that shoudn't be a big of an issue here. As i listen to it now, so much things happened while i was asleep. . . [ 3:30 a. M. !: some people are singing and speaking, and you can clearly hear one of them saying: "kurwa, grubo", which means - "f**k, heavy". Later on, the neighbours weren't sloppy too;). Hearing such recordings doesn't give you the liminous feeling of the place where it was recorded. You only get audio here, not the vision, the light, the brightness, the movement, the actions, and the space, the physical elements, only the best can imagine (so if you don't have such an imagination, pm me and i can send you a photo of the place where all this took place). Anyway, i hope that the birds will keep rockin' their solos, and the bees will keep visiting all the flowers around forever! (who knows, i might become one of them sometime;). Thanks and have a good listening session. Szymon.
Author: Twiciasty
00:00
00:30
[[this sound pack contains 8 sounds total, and this is # 4 of 8. ]]. Note: this sound (as all my sounds on freesound. Org are) is **public domain**. Use it, sell it, do anything and everything with it. No need to credit me. I only hope it's useful for someone! however, i'd love to hear about any projects you use my sounds with!!. Abstract, creepy sounds i recorded after watching this video on hans zimmer's creation of the score to the original dark knight soundtrack:. Https://www. Youtube. Com/watch?v=r-l1rctgtoe. (fascinating video, give it a watch! :d). - i found an old rusty razorblade (if it ain't rusty it ain't emo, amiright? amiright? oh god that's in poor taste)- and just started scraping it over the copper-wound strings of my seagull s6 acoustic guitar in which i've installed an electronic pickup. - recorded into reaper on my mid-2014 macbook pro, via direct in through a zoom h4n in audio-interface mode. Only processing: gentle eq highpass at 95 hz. And some slight gain reduction. These sounds remind me somehow of creepy film scores where the strings do that erratic pizzicato thing that sends tingles up your spine. Tell me what you come up with, i'd love to know!!.
Author: Afamiliarletter
00:00
04:06
Good King Wenceslas and His Merry Band performed by the Airmen of Note of the United States Air Force Band. Track 1 from Christmas Time is Here (1998). Recorded at the Center For The Arts, George Mason University, January 24-27, 1998. Credits: Alto Saxophone – Technical Sergeant Andy Axelrad* Alto Saxophone [Lead] – Senior Master Sergeant Joe Eckert* Baritone Saxophone – Master Sergeant Don New* Bass – Master Sergeant Paul Henry* Bass Trombone – Master Sergeant Dudley Hinote* Directed By – Chief Master Sergeant Peter C. BarenBregge* Drums – Senior Master Sergeant C. E. Askew* Engineer [Assistant] – Master Sergeant Kendall Thomsen* Engineer, Edited By – Bruce Leek Guitar – Technical Sergeant Shawn Purcell* Layout [Graphic] – Master Sergeant Dudley J. Hinote*, Master Sergeant Judith J. Thompson*, Technical Sergeant Robert K. McConnell* Liner Notes – Chief Master Sergeant Peter C. BarenBregge* Mixed By – Senior Master Sergeant Mike Crotty*, Chief Master Sergeant Peter C. BarenBregge* Percussion – Master Sergeant Pat Shrieves* (tracks: 2, 4 to 11) Piano – Master Sergeant Wade Beach Jr.* Producer – Senior Master Sergeant Mike Crotty*, Chief Master Sergeant Peter C. BarenBregge* Tenor Saxophone – Senior Master Sergeant Saul Miller Jr.* Tenor Saxophone [Lead] – Chief Master Sergeant Pete BarenBregge* Trombone – Technical Sergeant Jeff Martin* Trombone [Assistant Lead] – Technical Sergeant Ben Patterson* Trombone [Lead] – Master Sergeant Joe Jackson* Trumpet – Master Sergeant Rich Sigler*, Technical Sergeant Tim Leahey* Trumpet [Assistant Lead] – Master Sergeant Dave Detwiler* Trumpet [Lead] – Master Sergeant Bruce Gates* Vocals – Master Sergeant Tracey Wright*
Author: Composition: traditional; Arrangement: SMSgt Mike Crotty; Performance: United States Air Force Band, Airmen of Note; Recording: United States Air Force
00:00
05:41
Away in a Manger (jazz rendition) performed by the Airmen of Note of the United States Air Force Band. Track 10 from Christmas Time is Here (1998). Recorded at the Center For The Arts, George Mason University, January 24-27, 1998. Credits: Alto Saxophone – Technical Sergeant Andy Axelrad* Alto Saxophone [Lead] – Senior Master Sergeant Joe Eckert* Baritone Saxophone – Master Sergeant Don New* Bass – Master Sergeant Paul Henry* Bass Trombone – Master Sergeant Dudley Hinote* Directed By – Chief Master Sergeant Peter C. BarenBregge* Drums – Senior Master Sergeant C. E. Askew* Engineer [Assistant] – Master Sergeant Kendall Thomsen* Engineer, Edited By – Bruce Leek Guitar – Technical Sergeant Shawn Purcell* Layout [Graphic] – Master Sergeant Dudley J. Hinote*, Master Sergeant Judith J. Thompson*, Technical Sergeant Robert K. McConnell* Liner Notes – Chief Master Sergeant Peter C. BarenBregge* Mixed By – Senior Master Sergeant Mike Crotty*, Chief Master Sergeant Peter C. BarenBregge* Percussion – Master Sergeant Pat Shrieves* (tracks: 2, 4 to 11) Piano – Master Sergeant Wade Beach Jr.* Producer – Senior Master Sergeant Mike Crotty*, Chief Master Sergeant Peter C. BarenBregge* Tenor Saxophone – Senior Master Sergeant Saul Miller Jr.* Tenor Saxophone [Lead] – Chief Master Sergeant Pete BarenBregge* Trombone – Technical Sergeant Jeff Martin* Trombone [Assistant Lead] – Technical Sergeant Ben Patterson* Trombone [Lead] – Master Sergeant Joe Jackson* Trumpet – Master Sergeant Rich Sigler*, Technical Sergeant Tim Leahey* Trumpet [Assistant Lead] – Master Sergeant Dave Detwiler* Trumpet [Lead] – Master Sergeant Bruce Gates* Vocals – Master Sergeant Tracey Wright*
Author: Composition: James Murray; Arrangement: TSgt Alan Baylock; Performance: United States Air Force Band, Airmen of Note; Recording: United States Air Force
00:00
08:36
December Makes Me Feel This Way ("Joy to the World") performed by the Airmen of Note of the United States Air Force Band. Track 6 from Christmas Time is Here (1998). Recorded at the Center For The Arts, George Mason University, January 24-27, 1998. Credits: Alto Saxophone – Technical Sergeant Andy Axelrad* Alto Saxophone [Lead] – Senior Master Sergeant Joe Eckert* Baritone Saxophone – Master Sergeant Don New* Bass – Master Sergeant Paul Henry* Bass Trombone – Master Sergeant Dudley Hinote* Directed By – Chief Master Sergeant Peter C. BarenBregge* Drums – Senior Master Sergeant C. E. Askew* Engineer [Assistant] – Master Sergeant Kendall Thomsen* Engineer, Edited By – Bruce Leek Guitar – Technical Sergeant Shawn Purcell* Layout [Graphic] – Master Sergeant Dudley J. Hinote*, Master Sergeant Judith J. Thompson*, Technical Sergeant Robert K. McConnell* Liner Notes – Chief Master Sergeant Peter C. BarenBregge* Mixed By – Senior Master Sergeant Mike Crotty*, Chief Master Sergeant Peter C. BarenBregge* Percussion – Master Sergeant Pat Shrieves* (tracks: 2, 4 to 11) Piano – Master Sergeant Wade Beach Jr.* Producer – Senior Master Sergeant Mike Crotty*, Chief Master Sergeant Peter C. BarenBregge* Tenor Saxophone – Senior Master Sergeant Saul Miller Jr.* Tenor Saxophone [Lead] – Chief Master Sergeant Pete BarenBregge* Trombone – Technical Sergeant Jeff Martin* Trombone [Assistant Lead] – Technical Sergeant Ben Patterson* Trombone [Lead] – Master Sergeant Joe Jackson* Trumpet – Master Sergeant Rich Sigler*, Technical Sergeant Tim Leahey* Trumpet [Assistant Lead] – Master Sergeant Dave Detwiler* Trumpet [Lead] – Master Sergeant Bruce Gates* Vocals – Master Sergeant Tracey Wright*
Author: Composition: George Frederick Handel; Arrangement: TSgt Alan Baylock; Performance: United States Air Force Band, Airmen of Note; Recording: United States Air Force
00:00
22:46
Johann Sebastian Bach (1685-1750) Cantata BWV 125: Mit Fried und Freud ich fahr dahin (2 February 1725) 1. Mit Fried und Freud ich fahr dahin (Chorus) 2. Ich will auch mit gebrochnen Augen (Aria: A) 05:27 3. O Wunder, daß ein Herz (Recitative: B) 13:19 4. Ein unbegreiflich Licht erfüllt den ganzen Kreis der Erden (Duet: T, B) 15:36 5. O unerschöpfter Schatz der Güte (Recitative: A) 20:55 6. Er ist das Heil und selig Licht (Chorale) 21:37 Soloists: Alto: Ingeborg Danz Tenor: Mark Padmore Bass: Peter Kooy Performed by Collegium Vocale Gent under the direction of Philippe Herreweghe. Recorded by Harmonia Mundi France in 1998. "Bach composed the cantata 'Mit Fried und Freud' for the feast of the Purification on 2 February 1725. Here, the opening chorus is in 12/8 time, which is almost always associated with a peaceful, pastoral mood. Here it is the expressive key of E minor, which, raised to monumental heights, will re-appear in the opening chorus of the St. Matthew Passion. The chorale is sung in long note values by the soprano accompanied by the lower voices of the chorus in densely textured imitation, and which takes up the serenely elegiac movement of the instrumental ritornello theme. Only twice does Bach interrupt the pattern: at the words 'sanft und stille' all the voices drop into a sudden 'piano' and even the lively rhythm of the vocal part gives way to a more tranquil measure. The contrast of the 'forte' on the next words, 'wie Gott mir verheißen hat' is all the more convincing in relation to the preceding words. Once again Bach leads the vocal part into a quiet, even tenor for the final line of the chorale, 'der Tod ist mein Schlaf worden.' " - Thomas Seedorf Painting: Still Life with Three Medlars, Adriaen Coorte
Author: scrymgeour34
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.
Author: Kbclx
00:00
00:37
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.
Author: Kbclx
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