SOUND COLLECTION DEVICE
First Claim
1. A sound collection device, comprising:
- a plurality of unidirectional microphones;
a plurality of gain adjustment units which are configured to adjust gains of sounds collected by the respective microphones; and
an adder which is configured to add the gain-adjusted sounds to one another, whereinthe plurality of unidirectional microphones are arranged on one plane, and the maximum sensitivity direction of each of the unidirectional microphones is directed toward the inside of the arrangement.
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Accused Products
Abstract
The invention provides a sound collection device having little error in a desired directivity. The sound collection device includes a unidirectional microphone 12A, a unidirectional microphone 12B, and a unidirectional microphone 12C which are arranged on one plane. Each of the unidirectional microphones has the maximum sensitivity direction directed toward the inside of the arrangement. Each of the unidirectional microphones has a rear surface (direction of the minimum sensitivity) being open acoustically. Since the maximum sensitivity direction of each of the unidirectional microphones is directed toward the inside of the arrangement, the oscillation plane of each of the unidirectional microphones can be positioned substantially at the center of the arrangement. Thus, by adjusting the gain of the sound collected by the respective unidirectional microphones, the directivity can be freely formed on a flat plane with little error.
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Citations
8 Claims
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1. A sound collection device, comprising:
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a plurality of unidirectional microphones; a plurality of gain adjustment units which are configured to adjust gains of sounds collected by the respective microphones; and an adder which is configured to add the gain-adjusted sounds to one another, wherein the plurality of unidirectional microphones are arranged on one plane, and the maximum sensitivity direction of each of the unidirectional microphones is directed toward the inside of the arrangement. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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Specification