JPH087439Y2 - 音響反射集束装置 - Google Patents

音響反射集束装置

Info

Publication number
JPH087439Y2
JPH087439Y2 JP1990023106U JP2310690U JPH087439Y2 JP H087439 Y2 JPH087439 Y2 JP H087439Y2 JP 1990023106 U JP1990023106 U JP 1990023106U JP 2310690 U JP2310690 U JP 2310690U JP H087439 Y2 JPH087439 Y2 JP H087439Y2
Authority
JP
Japan
Prior art keywords
acoustic reflector
acoustic
reflector
speaker
microphone
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.)
Expired - Lifetime
Application number
JP1990023106U
Other languages
English (en)
Japanese (ja)
Other versions
JPH03114897U (en]
Inventor
裕保 加藤
剛 梅沢
俊一 高松
圭介 吉松
次美 町村
直文 印牧
和典 島村
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.)
Nippon Telegraph and Telephone Corp
Itoki Corp
Original Assignee
Nippon Telegraph and Telephone Corp
Itoki Corp
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 Nippon Telegraph and Telephone Corp, Itoki Corp filed Critical Nippon Telegraph and Telephone Corp
Priority to JP1990023106U priority Critical patent/JPH087439Y2/ja
Publication of JPH03114897U publication Critical patent/JPH03114897U/ja
Application granted granted Critical
Publication of JPH087439Y2 publication Critical patent/JPH087439Y2/ja
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Landscapes

  • Obtaining Desirable Characteristics In Audible-Bandwidth Transducers (AREA)
JP1990023106U 1990-03-07 1990-03-07 音響反射集束装置 Expired - Lifetime JPH087439Y2 (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1990023106U JPH087439Y2 (ja) 1990-03-07 1990-03-07 音響反射集束装置

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1990023106U JPH087439Y2 (ja) 1990-03-07 1990-03-07 音響反射集束装置

Publications (2)

Publication Number Publication Date
JPH03114897U JPH03114897U (en]) 1991-11-26
JPH087439Y2 true JPH087439Y2 (ja) 1996-03-04

Family

ID=31526105

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1990023106U Expired - Lifetime JPH087439Y2 (ja) 1990-03-07 1990-03-07 音響反射集束装置

Country Status (1)

Country Link
JP (1) JPH087439Y2 (en])

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5105623B2 (ja) * 2009-03-27 2012-12-26 公益財団法人鉄道総合技術研究所 鉄道車両の車軸軸受の異常検知装置及びその方法

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0349398A (ja) * 1989-07-17 1991-03-04 Nippon Telegr & Teleph Corp <Ntt> 音声入出力方式

Also Published As

Publication number Publication date
JPH03114897U (en]) 1991-11-26

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