UNTRANSLATED .. 2.16

Digtizing sound

Objective

Digitize sound signals from a microphone, and measure its frequency. Use the Piezo buzzer or any other source of sound like a tuning fork.

Procedure

_images/sound-capture.svg

Discussion

The driving signal and the microphone output is shown in figure

Sound waves create pressure variations in the medium through which it travel. The microphone generates a voltage proportional to the pressure. The voltage variations are in tune with the pressure variations. You can consider the microphone as a pressure sensor, but working only for time varying pressures.