JP2501440Y2 - 音響反射集束装置 - Google Patents

音響反射集束装置

Info

Publication number
JP2501440Y2
JP2501440Y2 JP1990023107U JP2310790U JP2501440Y2 JP 2501440 Y2 JP2501440 Y2 JP 2501440Y2 JP 1990023107 U JP1990023107 U JP 1990023107U JP 2310790 U JP2310790 U JP 2310790U JP 2501440 Y2 JP2501440 Y2 JP 2501440Y2
Authority
JP
Japan
Prior art keywords
acoustic
acoustic reflector
reflector
reflectors
sound
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
JP1990023107U
Other languages
English (en)
Japanese (ja)
Other versions
JPH03114898U (enrdf_load_stackoverflow
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 JP1990023107U priority Critical patent/JP2501440Y2/ja
Publication of JPH03114898U publication Critical patent/JPH03114898U/ja
Application granted granted Critical
Publication of JP2501440Y2 publication Critical patent/JP2501440Y2/ja
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Landscapes

  • Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
  • Obtaining Desirable Characteristics In Audible-Bandwidth Transducers (AREA)
JP1990023107U 1990-03-07 1990-03-07 音響反射集束装置 Expired - Lifetime JP2501440Y2 (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1990023107U JP2501440Y2 (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
JP1990023107U JP2501440Y2 (ja) 1990-03-07 1990-03-07 音響反射集束装置

Publications (2)

Publication Number Publication Date
JPH03114898U JPH03114898U (enrdf_load_stackoverflow) 1991-11-26
JP2501440Y2 true JP2501440Y2 (ja) 1996-06-19

Family

ID=31526106

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1990023107U Expired - Lifetime JP2501440Y2 (ja) 1990-03-07 1990-03-07 音響反射集束装置

Country Status (1)

Country Link
JP (1) JP2501440Y2 (enrdf_load_stackoverflow)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4395746B2 (ja) * 2004-10-08 2010-01-13 ヤマハ株式会社 音響システム
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
JPH03114898U (enrdf_load_stackoverflow) 1991-11-26

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