JPH02112094U - - Google Patents

Info

Publication number
JPH02112094U
JPH02112094U JP2091889U JP2091889U JPH02112094U JP H02112094 U JPH02112094 U JP H02112094U JP 2091889 U JP2091889 U JP 2091889U JP 2091889 U JP2091889 U JP 2091889U JP H02112094 U JPH02112094 U JP H02112094U
Authority
JP
Japan
Prior art keywords
sound
monitoring microphone
earmuff
speaker
canceled
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
JP2091889U
Other languages
English (en)
Japanese (ja)
Other versions
JPH0633750Y2 (ja
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 filed Critical
Priority to JP2091889U priority Critical patent/JPH0633750Y2/ja
Publication of JPH02112094U publication Critical patent/JPH02112094U/ja
Application granted granted Critical
Publication of JPH0633750Y2 publication Critical patent/JPH0633750Y2/ja
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Landscapes

  • Soundproofing, Sound Blocking, And Sound Damping (AREA)
JP2091889U 1989-02-25 1989-02-25 アクティブ・ノイズ・キャンセラー Expired - Lifetime JPH0633750Y2 (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2091889U JPH0633750Y2 (ja) 1989-02-25 1989-02-25 アクティブ・ノイズ・キャンセラー

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2091889U JPH0633750Y2 (ja) 1989-02-25 1989-02-25 アクティブ・ノイズ・キャンセラー

Publications (2)

Publication Number Publication Date
JPH02112094U true JPH02112094U (enrdf_load_stackoverflow) 1990-09-07
JPH0633750Y2 JPH0633750Y2 (ja) 1994-08-31

Family

ID=31237691

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2091889U Expired - Lifetime JPH0633750Y2 (ja) 1989-02-25 1989-02-25 アクティブ・ノイズ・キャンセラー

Country Status (1)

Country Link
JP (1) JPH0633750Y2 (enrdf_load_stackoverflow)

Also Published As

Publication number Publication date
JPH0633750Y2 (ja) 1994-08-31

Similar Documents

Publication Publication Date Title
JP3483879B2 (ja) イヤホン
CN100385997C (zh) 减噪头戴式耳机
EP1398991A3 (en) Acoustic Noise Reducing
JPS62141293U (enrdf_load_stackoverflow)
JPH01196999A (ja) ヘッドホン装置
JPH02254898A (ja) 騒音低減装置
JPH11308685A (ja) 能動型ノイズ低減ヘッドセット
JP2781193B2 (ja) アクティブ・ノイズ・キャンセラー
GB2361379A (en) Noise reducing headsets
JPH02112094U (enrdf_load_stackoverflow)
JPH0392898U (enrdf_load_stackoverflow)
JP2786278B2 (ja) アクティブ・ノイズ・キャンセラー
JPH02112092U (enrdf_load_stackoverflow)
JPH0386694U (enrdf_load_stackoverflow)
JPH0753119Y2 (ja) アクティブ・ノイズ・キャンセラー
JPH0275893U (enrdf_load_stackoverflow)
JPH0386691U (enrdf_load_stackoverflow)
JPS6141320Y2 (enrdf_load_stackoverflow)
JPH01202100A (ja) 音響装置
JPH0386697U (enrdf_load_stackoverflow)
JPH0420098U (enrdf_load_stackoverflow)
JPH0386695U (enrdf_load_stackoverflow)
JPH0391310U (enrdf_load_stackoverflow)
JPH0856395A (ja) 振動装置
JP2022189253A (ja) 音声増大装置、パーテーション、マスク、マウスシールドおよびフェイスシールド