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Author Topic: Audio boostng and white noise (Paranormal Tools)  (Read 3776 times)

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RealRiot

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Audio boostng and white noise (Paranormal Tools)
« on: July 15, 2012, 20:56:36 PM »
Hi Kam,

The investigation had been cancelled due to an illness. We will be Rescheduling the investigation for next week.
Question:
A normal human can hear between 20 Hz and 20,000 Hz Is it possible with electronics to pick up Below 20hz or above 20,000Hz.?
Are Microphones capable of such a thing.?
Are you familiar with the term [White Noise] .?


« Last Edit: July 15, 2012, 21:29:20 PM by RealRiot »

kam

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Re: Audio boostng and white noise (Paranormal Tools)
« Reply #1 on: July 19, 2012, 16:58:53 PM »
20 to 20K is the ideal. Usually it is up to 16-18 KHz. There are ways of course to "hear" these sounds, just like you can "see" the infrared spectra with an IR camera. You can record the sounds with an ultrasonic microphone (used for typical ultrasonic detectors and such)... And then play back in lower frequencies for example through a PC program.

White noise is a sort of acoustic sound that has a whole batch of frequencies in a flat volume. For example, take all frequencies from the acoustic spectrum (20-20KHz), scale them so that they all have the same volume, and you have white noise! It is so called "white" because of the white color, which is combined by all the colors of the visible spectrum (if you mix all the colors of the rainbow you will eventually get white...)