JPS6274297U - - Google Patents
Info
- Publication number
- JPS6274297U JPS6274297U JP16447085U JP16447085U JPS6274297U JP S6274297 U JPS6274297 U JP S6274297U JP 16447085 U JP16447085 U JP 16447085U JP 16447085 U JP16447085 U JP 16447085U JP S6274297 U JPS6274297 U JP S6274297U
- Authority
- JP
- Japan
- Prior art keywords
- microphone
- porous material
- electronic
- silencer
- noise
- 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.)
- Pending
Links
- 239000011148 porous material Substances 0.000 claims description 5
- 230000003584 silencer Effects 0.000 claims 4
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 claims 1
- 230000000694 effects Effects 0.000 claims 1
- 239000006260 foam Substances 0.000 claims 1
- 230000030279 gene silencing Effects 0.000 claims 1
- 230000001902 propagating effect Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 3
Description
第１図は本考案の一実施例を示す断面図、第２
図は本考案に係る多孔質材料の諸特性を示す特性
図、第３図は本考案における周波数レスポンス特
性図、第４図は従来のセンサマイクロフオンの一
例を示す断面図、第５図は従来における周波数レ
スポンス特性図である。
１０……マイクロフオン、１６……コード、１
８……パイプ、２０……多孔質材料。
Fig. 1 is a sectional view showing one embodiment of the present invention;
Figure 3 is a characteristic diagram showing various characteristics of the porous material according to the present invention, Figure 3 is a frequency response characteristic diagram in the present invention, Figure 4 is a sectional view showing an example of a conventional sensor microphone, and Figure 5 is a conventional It is a frequency response characteristic diagram at . 10... Microphone, 16... Code, 1
8...Pipe, 20...Porous material.
Claims (1)
幅で且つ逆位相の音波を人工的に発生させた付加
音による音波干渉効果によつて消音させる電子消
音器において、該消音器内の騒音の音波を検出す
るマイクロフオンの受音部の周囲に多孔材料を所
定の厚みに配設したことを特徴とする電子消音器
用センサマイクロフオン。 (2) 前記多孔質材料として、ウレタンフオーム
を用いることを特徴とする実用新案答録請求の範
囲第(1)項に記載の電子消音器用センサマイクロ
フオン。 (3) 前記多孔質材料の外周に、消音対象騒音波
長の１／４波長に比して十分に短い径及び長さの
管を前記マイクロフオンに対し同軸に配設したこ
とを特徴とする実用新案登録請求の範囲第(1)項
に記載の電子消音器用センサマイク。[Claims for Utility Model Registration] (1) Electronic silencing that uses the sound wave interference effect of artificially generated sound waves with the same sound pressure amplitude and opposite phase to the sound waves propagating from the noise source. 1. A sensor microphone for an electronic silencer, characterized in that a porous material is disposed at a predetermined thickness around a sound receiving part of the microphone for detecting sound waves of noise within the silencer. (2) The sensor microphone for an electronic silencer as set forth in claim (1) of the Utility Model Answer, characterized in that urethane foam is used as the porous material. (3) A practical use characterized in that a tube having a diameter and length sufficiently shorter than 1/4 wavelength of the noise wavelength to be silenced is arranged coaxially with the microphone around the outer periphery of the porous material. A sensor microphone for an electronic silencer according to claim (1) of patent registration.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16447085U JPS6274297U (en) | 1985-10-28 | 1985-10-28 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16447085U JPS6274297U (en) | 1985-10-28 | 1985-10-28 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6274297U true JPS6274297U (en) | 1987-05-12 |
Family
ID=31093618
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16447085U Pending JPS6274297U (en) | 1985-10-28 | 1985-10-28 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6274297U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06110474A (en) * | 1992-09-30 | 1994-04-22 | Matsushita Electric Ind Co Ltd | Noise eliminating device |
| JPH07334167A (en) * | 1994-06-07 | 1995-12-22 | Daidan Kk | Sensor device for active noise control system |
-
1985
- 1985-10-28 JP JP16447085U patent/JPS6274297U/ja active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06110474A (en) * | 1992-09-30 | 1994-04-22 | Matsushita Electric Ind Co Ltd | Noise eliminating device |
| JPH07334167A (en) * | 1994-06-07 | 1995-12-22 | Daidan Kk | Sensor device for active noise control system |
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