JPS5844891A - 指向性送受話ユニツト - Google Patents

指向性送受話ユニツト

Info

Publication number
JPS5844891A
JPS5844891A JP14326281A JP14326281A JPS5844891A JP S5844891 A JPS5844891 A JP S5844891A JP 14326281 A JP14326281 A JP 14326281A JP 14326281 A JP14326281 A JP 14326281A JP S5844891 A JPS5844891 A JP S5844891A
Authority
JP
Japan
Prior art keywords
microphone
speaker
wavelength
sound
receiving unit
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.)
Granted
Application number
JP14326281A
Other languages
English (en)
Japanese (ja)
Other versions
JPS6223959B2 (enrdf_load_stackoverflow
Inventor
Kiyoyasu Miyawaki
宮脇　清泰
Masamichi Ono
小野　昌道
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.)
NEC Corp
Original Assignee
NEC Corp
Nippon Electric Co 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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP14326281A priority Critical patent/JPS5844891A/ja
Publication of JPS5844891A publication Critical patent/JPS5844891A/ja
Publication of JPS6223959B2 publication Critical patent/JPS6223959B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
    • H04R1/32—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only
    • H04R1/40—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by combining a number of identical transducers

Landscapes

  • Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Obtaining Desirable Characteristics In Audible-Bandwidth Transducers (AREA)
JP14326281A 1981-09-11 1981-09-11 指向性送受話ユニツト Granted JPS5844891A (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14326281A JPS5844891A (ja) 1981-09-11 1981-09-11 指向性送受話ユニツト

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14326281A JPS5844891A (ja) 1981-09-11 1981-09-11 指向性送受話ユニツト

Publications (2)

Publication Number Publication Date
JPS5844891A true JPS5844891A (ja) 1983-03-15
JPS6223959B2 JPS6223959B2 (enrdf_load_stackoverflow) 1987-05-26

Family

ID=15334648

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14326281A Granted JPS5844891A (ja) 1981-09-11 1981-09-11 指向性送受話ユニツト

Country Status (1)

Country Link
JP (1) JPS5844891A (enrdf_load_stackoverflow)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6119320A (ja) * 1984-07-06 1986-01-28 Sharp Corp インサ−ト部材のインサ−ト成形同時接着方式
US4937877A (en) * 1988-02-26 1990-06-26 Northern Telecom Limited Modular microphone assembly
NO20093511A1 (no) * 2009-12-14 2011-06-15 Tandberg Telecom As Toroidemikrofon

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6119320A (ja) * 1984-07-06 1986-01-28 Sharp Corp インサ−ト部材のインサ−ト成形同時接着方式
US4937877A (en) * 1988-02-26 1990-06-26 Northern Telecom Limited Modular microphone assembly
NO20093511A1 (no) * 2009-12-14 2011-06-15 Tandberg Telecom As Toroidemikrofon

Also Published As

Publication number Publication date
JPS6223959B2 (enrdf_load_stackoverflow) 1987-05-26

Similar Documents

Publication Publication Date Title
US4237339A (en) Audio teleconferencing
US4184048A (en) System of audioconference by telephone link up
US4555592A (en) Wireless hands-free conference telephone system
US4669108A (en) Wireless hands-free conference telephone system
US4436966A (en) Conference microphone unit
US8462976B2 (en) Voice conference system
US5359448A (en) Infrared signal transmitter
CA2027586A1 (en) Cordless loud speaking telephone
JP2006121709A (ja) 天井マイクロホンアセンブリ
CA2027212A1 (en) Telephone conferencing arrangement
JPH01319360A (ja) 音声会議装置
WO2008076338A1 (en) Distributed emitter voice lift system
US4831656A (en) Conference microphone for use with hearing impaired amplification system
US4837829A (en) Acoustic sound system for a room
JPS5844891A (ja) 指向性送受話ユニツト
CN212013003U (zh) 一种拾音及扩音系统
CN211630317U (zh) 一种无线会议音箱
JP2727599B2 (ja) スピーカシステム
JPH0123024B2 (enrdf_load_stackoverflow)
WO2018082145A1 (zh) 一种蓝牙一拖二话筒音箱
GB2322257A (en) Increased acoustic separation for a speakerphone
CN219758968U (zh) 课堂互动教学系统
JPH02288455A (ja) 会議用通話装置
JPS5675764A (en) Conference telephone set
JPS6038065B2 (ja) 会議電話装置