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audio - Generating inaudible sound waves using MATLAB ...
https://dsp.stackexchange.com/questions/42864/generating-inaudible-sound-waves-using-matlab#:~:text=Generating%20a%20sound%20wave%20with%2018kHz%20frequency%20makes,it.%20As%20expected%2C%20the%20played%20sound%20was%20inaudible.
Sound - Audible and Inaudible Sounds | Frequency Range …
https://byjus.com/physics/inaudible-audible-sound/
Inaudible sound. Human ear cannot detect sound frequencies less than 20 vibrations per second i.e. 20 Hz. So any sound below this frequency will …
GitHub - TeleMidia/inaudible-sound-data-transmission: A ...
https://github.com/TeleMidia/inaudible-sound-data-transmission
The first attempt was to transmit prerecorded inaudible audio signals in a Ginga-NCL-compatible set-top-box. And the second attempt was to use NCLua to generate at runtime the inaudible audio signal. For the second attempt we extended NCL with a novel media object type, called SigGen, which can be used to generate arbitrary audio signals.
audio - Generating inaudible sound waves using MATLAB ...
https://dsp.stackexchange.com/questions/42864/generating-inaudible-sound-waves-using-matlab
As expected, the played sound was inaudible. The problem is, I want to play the inaudible sound with an interval. (playing sound wave for 1.75ms and having a silence period for 4.17ms repetitively) Because of the inserted silence period, the concatenated signal is no longer inaudible because new frequency components are added.
Ultrasound Signals – Why Epic Blocks Inaudible Audio
https://blog.epicbrowser.com/2018/04/ultrasound-signals-why-epic-blocks-inaudible-audio/
Ultrasound Signals – Why Epic Blocks Inaudible Audio The latest Epic releases, from v62 onwards, block ultrasound signals. If you visited a website which alarmed your dog but you couldn’t hear anything, it may have been emitting ultrasound signals which are inaudible to humans but perceptible to dogs and other creatures.
Malware that transfers stolen data using Inaudible Audio ...
https://thehackernews.com/2013/12/Malware-Inaudible-Audio-signals-badbios-virus.html
Malware that transfers stolen data using Inaudible Audio signals December 03, 2013 Mohit Kumar If you think that a computer which is not connected to a network, doesn't have any USB sticks attached to it and doesn't accept any kind of electronic connection requests are reasonably safe against hackers and from all the malware, then you are Wrong.
Does anyone know of an application that constantly sends ...
https://www.reddit.com/r/windows/comments/6lpp01/does_anyone_know_of_an_application_that/
Does anyone know of an application that constantly sends an inaudible audio signal to the speakers? Request. Preferably in the form of a non-obtrusive background process or taskbar icon. I have a Harman & Kardon Soundsticks III 2.1 set connected to my PC and one of the 'features' is a energy saving mode where the main sub unit will shut itself ...
Audio Signal Levels Explained: Mic, Instrument, Line, and ...
https://www.blackghostaudio.com/blog/audio-signal-levels-explained-mic-instrument-line-and-speaker
Line Level Signal. If you feed a mic or instrument level signal into a line input on a piece of hardware, you’ll end up with a very weak and, in some cases, almost inaudible sound. This is incredibly problematic when you run the signal through a device that is input-level dependent, like a compressor.
Counter Surveillance - Audio Jammers & Noise Generators ...
https://uspystore.com/counter-surveillance/audio-jammers-noise-generators/
Audio jammers and noise generators are specially designed devices that cause interference to the recording and listening capabilities of microphones and recorders. ... The Professional white noise generator & acoustic analyzer ANG2200 injects inaudible noise into the environment parameters to protect against eavesdropping. The ANG2200 will ...
Inaudible waveforms delay - is it possible? | PURE DATA forum~
https://forum.pdpatchrepo.info/topic/2553/inaudible-waveforms-delay-is-it-possible
I am trying to delay the passage of an inaudible audio signal transiting between two devices. The waveforms we are using are between frequency ranges between 25 KHz and 100 KHz. I realize that it would be almost impossible without specialized equipment to reach the 100 KHz but I figure that with an audio card sampling at 192 KHz I could reach ...
A Tutorial on MPEG/Audio Compression
https://web.media.mit.edu/~tristan/Classes/MAS.945/Papers/Technical/pan96tutorial.pdf
perceptually irrelevant parts of the audio signal. Removal of such parts results in inaudible distortions, thus MPEG/audio can compress any signal meant to be heard by the human ear. In keeping with its generic nature, MPEG/audio offers a diverse assortment of compression modes: • The audio sampling rate can be 32, 44.1, or 48 kHz.
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