【発明の名称】音響信号変換装置及びその方法

Title:

【発明の名称】音響信号変換装置及びその方法

Document Type and Number:

Japanese Patent JP3014294

Kind Code:

B2

Abstract:

Improved microphone performance is achieved by configuring a second-order derivative microphone assembly in such a way that radially divergent near-field input produces a microphone response proportional to a first-order spatial derivative of the acoustic pressure field.

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Inventors:

Charles Spurgeon Bartlett
Michael Anthony Zuniga

Application Number:

JP11656895A

Publication Date:

February 28, 2000

Filing Date:

April 19, 1995

Export Citation:

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Assignee:

AT&T CORP.

International Classes:

H04R1/40; H03H21/00; H04M1/03; H04M1/19; H04R3/00; H04R29/00; H04R; (IPC1-7): H04R3/00; H04M1/03; H04M1/19; H04R1/40

Domestic Patent References:

JP2117228A
JP6224987A

Attorney, Agent or Firm:

Hirofumi Mitsumata

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