Patent ID: 8433089

Claim:
A voice input apparatus comprising: a first housing; and a microphone unit which is disposed in the inside of the first housing; wherein the microphone unit includes: a second housing located under the first housing in a vertical direction, in which a first sound hole and a second sound hole are formed; a diaphragm which is disposed in the inside of the second housing; and an electric circuit portion which processes an electric signal that is generated based on a vibration of the diaphragm, wherein, in the first housing, a first opening portion which communicates with the first sound hole and a second opening portion which communicates with the second sound hole are formed; a first sound guide space which guides a sound outside the first housing from the first opening portion to a first surface of the diaphragm and a second sound guide space which guides a sound outside the first housing from the second opening portion to a second surface of the diaphragm, that is, an opposite surface of the first surface of the diaphragm is formed; the electric circuit portion is disposed in either one of the first sound guide space and the second sound guide space; and an acoustic resistance portion which adjusts at least one of a frequency characteristic of the first sound guide space and a frequency characteristic of the second sound guide space is formed.