JPS6249456U - - Google Patents

Info

Publication number
JPS6249456U
JPS6249456U JP12852585U JP12852585U JPS6249456U JP S6249456 U JPS6249456 U JP S6249456U JP 12852585 U JP12852585 U JP 12852585U JP 12852585 U JP12852585 U JP 12852585U JP S6249456 U JPS6249456 U JP S6249456U
Authority
JP
Japan
Prior art keywords
reduction device
noise
noise propagation
noise reduction
control means
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
JP12852585U
Other languages
English (en)
Other versions
JPH046386Y2 (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 JP1985128525U priority Critical patent/JPH046386Y2/ja
Publication of JPS6249456U publication Critical patent/JPS6249456U/ja
Application granted granted Critical
Publication of JPH046386Y2 publication Critical patent/JPH046386Y2/ja
Expired legal-status Critical Current

Links

Landscapes

  • Porous Artificial Stone Or Porous Ceramic Products (AREA)
  • Vehicle Interior And Exterior Ornaments, Soundproofing, And Insulation (AREA)

Description

【図面の簡単な説明】
第1図から第5図はこの考案にかかる騒音低減
装置の一実施例を示し、第1図は全体斜視図、第
2図は騒音低減装置が装着された自動車の断面図
、第3図は要部の断面図、第4図は音域制御手段
である音響レンズの断面図、第5図は作用を説明
するための自動車の一部の側面図である。第6図
はこの考案にかかる騒音低減装置の他の実施例を
示す斜視図である。 20……騒音低減装置、21a,21b,21
c,21d,30……音響レンズ(音域制御手段
)。

Claims (1)

    【実用新案登録請求の範囲】
  1. 長さが異なる多数の中空孔を有する多孔質材料
    から成り、騒音伝播方向の厚さ寸法が騒音伝播方
    向と略直交する一の方向で連続的に変化する音域
    制御手段を備えることを特徴とする騒音低減装置
JP1985128525U 1985-08-22 1985-08-22 Expired JPH046386Y2 (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1985128525U JPH046386Y2 (ja) 1985-08-22 1985-08-22

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1985128525U JPH046386Y2 (ja) 1985-08-22 1985-08-22

Publications (2)

Publication Number Publication Date
JPS6249456U true JPS6249456U (ja) 1987-03-27
JPH046386Y2 JPH046386Y2 (ja) 1992-02-21

Family

ID=31024275

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1985128525U Expired JPH046386Y2 (ja) 1985-08-22 1985-08-22

Country Status (1)

Country Link
JP (1) JPH046386Y2 (ja)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5262826A (en) * 1975-11-17 1977-05-24 Kubota Ltd Ventilation of sound insulated engine working machine
JPS5783019U (ja) * 1980-11-10 1982-05-22

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5262826A (en) * 1975-11-17 1977-05-24 Kubota Ltd Ventilation of sound insulated engine working machine
JPS5783019U (ja) * 1980-11-10 1982-05-22

Also Published As

Publication number Publication date
JPH046386Y2 (ja) 1992-02-21

Similar Documents

Publication Publication Date Title
JPS6249456U (ja)
JPS61126298U (ja)
JPS646699U (ja)
JPH0341035U (ja)
JPS6428083U (ja)
JPS63177656U (ja)
JPS6376552U (ja)
JPS6149399U (ja)
JPH0216315U (ja)
JPH0294484U (ja)
JPH0264608U (ja)
JPS61203859U (ja)
JPS62139785U (ja)
JPH0457987U (ja)
JPS61203860U (ja)
JPS6237558U (ja)
JPS6430761U (ja)
JPH0385091U (ja)
JPH02149383U (ja)
JPH01116578U (ja)
JPS61189288U (ja)
JPS60181990U (ja) スピ−カ用平面振動板
JPS63197193U (ja)
JPH03122499U (ja)
JPS63126512U (ja)