JPS6473848A - Loudspeaker speech device - Google Patents

Loudspeaker speech device

Info

Publication number
JPS6473848A
JPS6473848A JP23053587A JP23053587A JPS6473848A JP S6473848 A JPS6473848 A JP S6473848A JP 23053587 A JP23053587 A JP 23053587A JP 23053587 A JP23053587 A JP 23053587A JP S6473848 A JPS6473848 A JP S6473848A
Authority
JP
Japan
Prior art keywords
speaker
mike
mikes
voice
output
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP23053587A
Other languages
Japanese (ja)
Inventor
Hiroaki Takeyama
Hitoshi Fukagawa
Yasukazu Kinekawa
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Electric Works Co Ltd
Original Assignee
Matsushita Electric Works Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Matsushita Electric Works Ltd filed Critical Matsushita Electric Works Ltd
Priority to JP23053587A priority Critical patent/JPS6473848A/en
Publication of JPS6473848A publication Critical patent/JPS6473848A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE:To prevent the creeping of voice from a speaker to a mike from being generated by releasing a part of a loop formed between the speaker and the mike, by performing the acoustic coupling of the output of two systems consisting of first and second mikes, and negating the voice from the speaker. CONSTITUTION:The speaker 7 and two mikes 1a and 1b are arranged at the front of a housing 12, and the first mike 1a is arranged being separated by a distance l1 from the speaker 7, and the second mike 1b is arranged at a position separated more than the first mike 1a from the speaker 7 separated by a distance l2. Received voice issued from the speaker 7 negates the output of the first and second mikes 1a and 1b mutually by a differential amplifier circuit 17. Since it is assumed that the surface sound pressure of transmitting voice to the first and second mikes 1a and 1b are almost equal, the output C of the differential amplifier 17 is not negated, and the transmitting voice is sent to a speech line 11 via an anti-sidetone circuit 4.
JP23053587A 1987-09-14 1987-09-14 Loudspeaker speech device Pending JPS6473848A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP23053587A JPS6473848A (en) 1987-09-14 1987-09-14 Loudspeaker speech device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP23053587A JPS6473848A (en) 1987-09-14 1987-09-14 Loudspeaker speech device

Publications (1)

Publication Number Publication Date
JPS6473848A true JPS6473848A (en) 1989-03-20

Family

ID=16909272

Family Applications (1)

Application Number Title Priority Date Filing Date
JP23053587A Pending JPS6473848A (en) 1987-09-14 1987-09-14 Loudspeaker speech device

Country Status (1)

Country Link
JP (1) JPS6473848A (en)

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