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MICROPHONES AND SOUND BASICS - abhilash - 08-16-2017
MICROPHONES AND SOUND BASICS
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Microphone
Microphone is a transducer.It converts sound wave (acoustical energy) into electrical energy
Five important characteristics of microphone
Operating principle
Frequency response
Directionality of microphone
Electrical output and
Physical design of the microphone
Pressure-operated Microphones
Sound pressure is applied on one side of the diaphragm.
Electrical output is proportional to the sound pressure.
Theoretically omnidirectional.
However,the physical size of microphone works as an obstacle at high
frequency.
Sensitivity at HF decreases.
Combined-operation Microphones
The principle of pressure-operated microphones and pressure gradient operated microphones are combined to get maximum sensitivity in one direction and minimum sensitivity in the opposite direction.
Unidirectional characteristics.