AF sinusoidal pulse generator - produces white noise and pure sounds variable in frequency intensity and rhythm for audiometry

摘要

The audio frequency pulse generator contains circuits to generate a sinusoidal signal of variable amplitude, whose period can be selected as required, and circuits for generating white noise. The periodic and white noise circuits can be switched as required to the output, to give the selected sounds for audiometry. The sine wave generator has an oscillator of frequency of 8 KHz, which can be divided into other frequencies for filtering and selection. The audio frequency generator is, therefore, able to generate pure sounds whose frequency, intensity, duration and rhythm can be selected and read directly in decibels, as well as random white noise signals.