The sound pressure can only reach the diaphragm from one side.įigure 1. Thus, further, a division is made:Ĭrystal microphones, heating wire microphones and carbon microphones are not described here, as they do not play any role in professional audio.Ī pressure microphone is, in principle, a diaphragm in front of a closed chamber. The above classification does not refer to conversion from acoustic energy to electricity. Combinations of pressure and pressure gradient microphones.Therefore, this section on microphones will only deal with these types: Most microphones react to the sound pressure, the sound-pressure gradient or a combination of both. Sound as a physical phenomenon is, in principle, described by either sound pressure, particle velocity or sound intensity. The mechanical movement is then converted into an electrical signal by an electromechanical coupling. This conversion occurs via a mechanical system, usually a diaphragm, set into oscillations by a sound field. The microphone is an electroacoustic device that converts acoustic energy into electrical energy.
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