What is "Boundary-Layer Microphone"?

Boundary-Layer Microphone

A microphone placed on the surface of a large boundary. At the boundary, the direct sound is doubled, which yields +6 dB of the sound pressure. The diffuse sound is also doubled, but due to the random phase, the sum only yields +3 dB. In this way, the microphone emphasizes direct sound over the diffuse sound, providing higher directivity of the microphone. The principle is also known as PZMTM (Pressure Zone Microphone), which is a trademark of Crown.


Related Products

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BLM4060 Boundary Layer Mic

This mic solution is ideal for use in boardrooms, conference facilities and courtrooms. It is also a great solution for teleconferencing and other applications where excellent vocal pickup is required.

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