| 摘要 |
PROBLEM TO BE SOLVED: To provide a inspection equipment of a directional microphone capable of preventing prolongation of an inspection period of a directional microphone, and detecting failure as a single body, in connection or in assembly of it. SOLUTION: The inspection equipment 1 of a directional microphone comprises a directional microphone 2 provided in a cabin, left and right speakers 3 and 4 positioned left and right in the cabin, a control means 5a for controlling output of the left and right speakers 3 and 4, and a measuring means 5b for measuring the output of the directional microphone 2. The control means 5a allows the specified speaker to output signals in a voice frequency region. The measuring means 5b measures intensity of the signal of the voice frequency region outputted from the directional microphone 2 in response. If the intensity of the signal of the voice frequency measured by the measuring means 5b does not exceed a specified reference value, a failure detecting means detects failure as a single body or in connection of the directional microphone 2. COPYRIGHT: (C)2007,JPO&INPIT
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