Title:
【発明の名称】傾斜指向性マイクロホン・システムとその方法
Document Type and Number:
Japanese Patent JP3106500
Kind Code:
B2
Abstract:
A gradient directional microphone system (100) and method therefor includes no more than three microphones (101, 103, 105) and a processor (107). Each of the microphones (101, 103, 105) have substantially the same gradient order (135, 137, 139) and frequency response. Each microphone produces an electrical signal (109, 111, 113) that is responsive to sound pressure (119, 121, 123) at each microphone (101, 103, 105). The processor (107) is coupled to receive the electrical signal (109, 111, 113) from each microphone (101,103, 105), and operative to produce an output signal (131) for the gradient directional microphone system (100) having a gradient order (141) at least two gradient orders higher than the gradient order (135, 137, 139) of each of the microphones (101, 103, 105). Using the present invention, the size and complexity of the gradient directional microphone system (100) is substantially reduced over that of the prior art.
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Inventors:
Bradley, Wayne Hart
Weirner, Richard Earl
Weirner, Richard Earl
Application Number:
JP51320895A
Publication Date:
November 06, 2000
Filing Date:
September 29, 1994
Export Citation:
Assignee:
MOTOROLA INCORPORATED
International Classes:
H04R1/40; H04R3/00; (IPC1-7): H04R3/00
Domestic Patent References:
| JP5145986A |
Attorney, Agent or Firm:
Masanori Honjo (2 others)