20 - 20,000 hz Audio Spectrum Test. Only a Rare Few can hear above 18,000hz. Take it to find out if you're one of them. Title ...

The author is senior development engineer for Wheatstone Corp. There’s nothing like a little audio performance testing to cap off a hectic week at the station, especially if you don’t have to haul out ...

The circuit has been designed to create a spectrum analyzer that will provide an analysis of a sound to determine at various frequencies, the volume of sounds that make up the overall sound spectrum.