158 Royalty-Free Audio Tracks for "Pure"

**warning**: do not play this sound with full volume on speakers with an amplifier; you risk damaging the driver through exertion. Format: wav - 24 bit, 44. 1khz [mono] - loopabledescription:a 30 second long pure sine wave of 14hz, at a constant spl level of -5 decibels. The audio file is loopable with a coherent crossing point from end to beginning. If you would like to read up on the infrasound phenomenon go here:http://goo. Gl/gmbsvm. Methodology:synthesis generation in sound forge pro macosx. -------------. This can be used for experimental purposes. I used infrasound in a horror film; attempting to create a physical sense of terror with the motion picture at specific times. It is believed by some that a high enough amplitude of infrasound can be used as a weapon. -------------. If you like or dislike this sound, please comment on your thoughts :). Reminder:this sound is licenced under cc0 [public domain] - so you are free to use and abuse it. I wouldn't mind a credit though if you're feeling generous. . .

This started out as a good idea for one of my projects but began to have a life of it's own as i rolled up my sleeves and fussed over every detail. As you will hear, this sound file/track embraces panning like their is no tomorrow. You should be able to fold your sounds into it. Either snaking through it with your own panning sounds, or laying your sounds straight down the middle. - you should find several looping points within the 2:28 runtime. Most of the sounds i upload are from songs where i have lost my direction. In sharing them here, i hope someone can pick them up and make them part of something beautiful. I would love to hear what you make of them as it will be a source of inspiration to me. To see the possibilities beyond my own horizon. Everything starts off as a soundbridge project. I occasionally use aria maestosa for midi composition as the sounds are basic and pure. Audacity can't be beat when it comes to clipping. Engine dj is my library manager.

This sound sample is part of the free collective soundbank "negative mass", which is comprised of around 60 royalty free samples and field recordings used by some of the artists featured in the "new chronologies of sound" collection to compose their sound works. "new chronologies of sound" is a sound art collection that proposes to generate debate on issues related to the ways in which lockdown affected our ways of listening, perception of time and work habits, by developing a collection of sound works based on field recordings, which reflect upon those matters. This artistic research project gathers artists and researchers from all over the globe — agf (de), budhaditya chattopadhyay (in), bj nilsen (se), diana combo (pt), gustavo costa (pt), hugo branco (pt), kyoka (jp), laura romero (es), lawrence english (es), matthew herbert (uk), miguel isaza (co) and natalia valencia zuluaga (co)— encompassing a broad diversity of aesthetics, geographies, processual latitudes and conceptual attitudes, which range from pure field recordings and processed soundscapes down to more musical or compositional uses of found sounds. + info: https://lifeisavicnic. Com/vn003.

Electro-magnetic interference from a desktop computer, and an at&t; cordless phone handset cl82301 when held near the internal ferrite antenna on the back right of a 13-year-old boombox listening to the am broadcast band. Recorded 2 years ago so i forget where i was listening. Recorded with goldwave from line-in. You hear emi from the computer at first, then i bring the phone on standby near the radio and you hear a series of nearly pure tones. The phone comes on and you hear a distorted dial tone. I move the phone away from the radio for a few seconds and you hear the computer again, then i bring the phone near and you hear a distorted busy signal. I disconnect and the phone continues sending to the base for a few seconds so you just hear a hum, then the idle tones are heard, then the computer noise as i remove the phone.

No, i cant really describe what this is! but i use a ring modulator. Two audio signals goes in. I guess the side band frequencies goes out??? or?! anyway the original frequencies are also in the mix. So, two audio signal and the result from a diy ring mod. Have to learn more. . . Read below!!! in this sound you are listening to, the result, the ring modulation, carrier signal and modulator signal. After some research. . . I write this for myself. . . Correct me if i'm wrong!!!from youtube (audiocollage)ring modulation is the sum and the differences of the carrier and modulator signal. Feed the ring modulator with 261,626hz and 391,995hz and you get (261,626 + 391,995) 653,621hz and (391,995 - 261,626) 130,369hz. From wikipedia". . . Neither the carrier nor the incoming signal is prominent in the outputs, and ideally, not at all. "". . . In the basic case where two sine waves of frequencies f1 and f2 (f1 < f2) are multiplied, two new sine waves are created, with one at f1 + f2 and the other at f2 – f1. The two new waves are unlikely to be harmonically related and (in a well-designed ring modulator) the original signals are not present. It is this that gives the ring modulator its unique tones. ". Above is true when using pure sine waves! waves with no harmonics. I have a passive diy ring modulator. I guess it's not acting "perfect". . .

Noise created by individual oscillators, using audio paint, with different height images, to demonstrate what happens with too few oscillators vs. Plenty. In the end, the result is not random enough to be noise. The first 2-second burst is pure white noise for comparison. Then we have multiple 1-second bursts from audio-paint in a sequence of different image sizes: 50,100,150,200,250,350, 500, 700, 1000, 1350, 1750, 2200, 2700, 3250, 3850, 4500, and 9999 (this corresponds to the number of oscillators). The last burst is longer, and there is 1/2 second gap of silence after the first (reference) burst and before that last (9999) burst. The images other dimension was 20. The spacing of frequencies was exponential, between 40 hz and 18 khz. This is not intended to be useful, just an illustration during a discussion in a forum (http://www. Freesound. Org/forum/sample-requests/35199/?page=2#post75605). As mentioned there, i realized only afterward that exponential spacing would be giving me an approximation to pink noise instead of white noise, so the reference burst at the start is not really a fair comparison. Ideally, i would go back and re-do all this using linear spacing, but that's a lot of trouble. :-) i did, however, change to linear to get a white approximation, but that's a different sound i'll upload separately (c. F. Http://www. Freesound. Org/people/zimbot/sounds/242053/). I don't believe you can get true white noise without at least something being random in your synthesis method.

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.

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.