Version 1.0, August 31, 2001, Copyright, Hugh Jack 1993-2001
· Convert sound pressure to electrical signals
· A microphone has a finite area to measure the sound with. As the diameter `d' approaches the wavelength of sound, the sound becomes distorted.
· When wind blows across a microphone, it generates a low frequency turbulence noise. This is often corrected by using dBA measurements, and foam balls.
· Corrections must also be made for changes in temperature and altitude
