Microphone unit

摘要

A microphone unit (1) is provided with an electro-acoustic transducer (13) which converts acoustic signals into electric signals on the basis of the oscillation of a diaphragm (134), and a housing (10) which contains the electro-acoustic transducer (13). The housing (10) is provided with: a first sound conduction space (SP1) that guides sound waves from the outside to one side of the diaphragm (134) via at least one first aperture (18) formed on the exterior of the housing (10); and a second sound conduction space (SP2) that guides sound waves from the outside to the other side of the diaphragm (134) via at least one second aperture (19) formed on the exterior of the housing (10). The total square area of at least one first aperture (18) and the total square area of at least one second aperture (19) are not the same.

主权项

1. A microphone unit comprising: an electro-acoustic conversion device that converts an input sound into an electric signal; and a housing that houses the electro-acoustic conversion device; wherein:
an outer surface of the housing is provided with at least one first opening and at least one second opening, the housing is provided therein with: a first sound guide space that guides a sound from outside the housing to a first surface of the electro-acoustic conversion device via the at least one first opening; and a second sound guide space that guides a sound from outside the housing to a second surface of the electro-acoustic conversion device via the at least one second opening; the first sound guide space and the second sound guide space are each one space; the first sound guide space has a large volume compared with the second sound guide space; and a total area of the at least one first opening is larger than a total area of the at least one second opening.