JP2010103976A - スピーカーの微弱信号漏洩遮断装置 - Google Patents
スピーカーの微弱信号漏洩遮断装置 Download PDFInfo
- Publication number
- JP2010103976A JP2010103976A JP2009190273A JP2009190273A JP2010103976A JP 2010103976 A JP2010103976 A JP 2010103976A JP 2009190273 A JP2009190273 A JP 2009190273A JP 2009190273 A JP2009190273 A JP 2009190273A JP 2010103976 A JP2010103976 A JP 2010103976A
- Authority
- JP
- Japan
- Prior art keywords
- speaker
- weak signal
- threshold element
- signal
- 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.)
- Granted
Links
- 230000002457 bidirectional effect Effects 0.000 claims description 41
- 230000000903 blocking effect Effects 0.000 claims description 35
- 239000003990 capacitor Substances 0.000 claims description 7
- 230000002159 abnormal effect Effects 0.000 claims description 6
- 230000002452 interceptive effect Effects 0.000 abstract 2
- 230000002093 peripheral effect Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 12
- 230000005236 sound signal Effects 0.000 description 4
- 238000005259 measurement Methods 0.000 description 2
- 230000003321 amplification Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005674 electromagnetic induction Effects 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03G—CONTROL OF AMPLIFICATION
- H03G3/00—Gain control in amplifiers or frequency changers
- H03G3/20—Automatic control
- H03G3/30—Automatic control in amplifiers having semiconductor devices
- H03G3/34—Muting amplifier when no signal is present or when only weak signals are present, or caused by the presence of noise signals, e.g. squelch systems
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R3/00—Circuits for transducers, loudspeakers or microphones
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Circuit For Audible Band Transducer (AREA)
- Fittings On The Vehicle Exterior For Carrying Loads, And Devices For Holding Or Mounting Articles (AREA)
Abstract
【解決手段】本発明によるスピーカーの微弱信号漏洩遮断装置は、両端の電圧差が所定値以上である時にのみ導通する双方向しきい素子を含み、前記双方向しきい素子は、スピーカー信号線から入力される前記所定値以上のスピーカー駆動信号を通過させ、スピーカーのボイスコイルから入力される前記所定値未満の微弱信号を遮断する。
【選択図】図2a
Description
100b マイク
100c 従来の案内放送スピーカー
200 本発明のスピーカー
110a、110b、210 永久磁石
120a、120b、220 ボイスコイル
130a、130b、230 振動板
140a、250 スピーカー信号線
140b マイク信号線
160、260 トランスフォーマ
240 微弱信号漏洩遮断装置
240a 双方向しきい素子
241 ダイオード
243 ジェンナーダイオード
270a 低域通過フィルタ
270b 高域通過フィルタ
280 リミッター
D1 信号発生器
D2 信号受信器
D3 音響機器
D4 騷音計
D5 MP3プレーヤー
AMP オーディオアンプ
Claims (9)
- 両端の電圧差が所定値以上である時にのみ導通する双方向しきい素子を含み、
前記双方向しきい素子は、前記所定値以上のスピーカー駆動信号は通過させ、前記所定値未満の微弱信号は遮断することを特徴とするスピーカーの微弱信号漏洩遮断装置。 - 前記双方向しきい素子は、
反対方向に並列連結された2個のダイオードを備えるか、または反対方向に直列連結された2個のジェンナーダイオードを備えることを特徴とする請求項1に記載のスピーカーの微弱信号漏洩遮断装置。 - 前記双方向しきい素子は、
1個以上のバリスタを備えることを特徴とする請求項1に記載のスピーカーの微弱信号漏洩遮断装置。 - 可聴周波数以上のノイズまたは異常信号を遮断するための低域通過フィルタをさらに含むことを特徴とする請求項1に記載のスピーカーの微弱信号漏洩遮断装置。
- 前記低域通過フィルタは、インダクタ及びキャパシタを含むことを特徴とする請求項4に記載のスピーカーの微弱信号漏洩遮断装置。
- 可聴周波数以上のノイズまたは異常信号を他の経路へ迂回させるための高域通過フィルタをさらに含むことを特徴とする請求項1に記載のスピーカーの微弱信号漏洩遮断装置。
- 前記高域通過フィルタは、キャパシタを備えることを特徴とする請求項6に記載のスピーカーの微弱信号漏洩遮断装置。
- 前記スピーカー信号線の両端の電圧差を所定値以下に制限するリミッターをさらに含むことを特徴とする請求項1に記載のスピーカーの微弱信号漏洩遮断装置。
- 前記リミッターは、バリスタを備えることを特徴とする請求項8に記載のスピーカーの微弱信号漏洩遮断装置。
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020080104624A KR100999450B1 (ko) | 2008-10-24 | 2008-10-24 | 스피커의 미약신호 누설 차단 장치 |
KR10-2008-0104624 | 2008-10-24 |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2010103976A true JP2010103976A (ja) | 2010-05-06 |
JP4938061B2 JP4938061B2 (ja) | 2012-05-23 |
Family
ID=41650144
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2009190273A Expired - Fee Related JP4938061B2 (ja) | 2008-10-24 | 2009-08-19 | スピーカーの微弱信号漏洩遮断装置 |
Country Status (5)
Country | Link |
---|---|
US (1) | US8693710B2 (ja) |
EP (1) | EP2180720B1 (ja) |
JP (1) | JP4938061B2 (ja) |
KR (1) | KR100999450B1 (ja) |
AT (1) | ATE525866T1 (ja) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR101909701B1 (ko) * | 2018-03-05 | 2018-10-18 | 한국전자통신연구원 | 전자 기기의 녹음 방지 장치 및 방법 |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3283073A (en) * | 1962-11-30 | 1966-11-01 | Webster Electric Co Inc | Intercommunication system and eavesdropping preventing means therefor |
JPH05264332A (ja) * | 1992-03-17 | 1993-10-12 | Sharp Corp | 外来音検出装置および音声出力装置 |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2841647A (en) * | 1953-12-07 | 1958-07-01 | Gen Dynamics Corp | Privacy insuring means for intercommunication systems |
JPS61262399A (ja) * | 1985-05-16 | 1986-11-20 | Matsushita Electric Ind Co Ltd | スピ−カ保護回路 |
KR19990041875A (ko) | 1997-11-25 | 1999-06-15 | 전주범 | 교류전류의 관성저항 소거형 스피커장치 |
BR9802978A (pt) * | 1998-03-30 | 2000-03-28 | Solucoees Operacionais Ind Com | Sistema de distribuição de som ambiente e voz de aviso pelas linhas de ramais telefônicos. |
KR20050102992A (ko) | 2004-04-23 | 2005-10-27 | 주식회사 팬택앤큐리텔 | 정전기 보호 및 잡음 차단이 가능한 스피커 |
KR100901772B1 (ko) | 2007-10-08 | 2009-06-11 | 한국전자통신연구원 | 스피커를 통한 도청을 방지하기 위한 장치 |
-
2008
- 2008-10-24 KR KR1020080104624A patent/KR100999450B1/ko active IP Right Grant
-
2009
- 2009-07-21 EP EP09166026A patent/EP2180720B1/en not_active Not-in-force
- 2009-07-21 US US12/506,624 patent/US8693710B2/en not_active Expired - Fee Related
- 2009-07-21 AT AT09166026T patent/ATE525866T1/de not_active IP Right Cessation
- 2009-08-19 JP JP2009190273A patent/JP4938061B2/ja not_active Expired - Fee Related
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3283073A (en) * | 1962-11-30 | 1966-11-01 | Webster Electric Co Inc | Intercommunication system and eavesdropping preventing means therefor |
JPH05264332A (ja) * | 1992-03-17 | 1993-10-12 | Sharp Corp | 外来音検出装置および音声出力装置 |
Also Published As
Publication number | Publication date |
---|---|
US8693710B2 (en) | 2014-04-08 |
US20100104109A1 (en) | 2010-04-29 |
JP4938061B2 (ja) | 2012-05-23 |
EP2180720A1 (en) | 2010-04-28 |
EP2180720B1 (en) | 2011-09-21 |
KR20100045618A (ko) | 2010-05-04 |
ATE525866T1 (de) | 2011-10-15 |
KR100999450B1 (ko) | 2010-12-09 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
Roy et al. | Backdoor: Making microphones hear inaudible sounds | |
JP6462095B2 (ja) | 適応雑音消去システムの係数の動的バイアスを含む適応雑音消去のためのシステム及び方法 | |
US9602924B2 (en) | Microphone with programmable frequency response | |
US9813812B2 (en) | Method of controlling diaphragm excursion of electrodynamic loudspeakers | |
US9525939B2 (en) | Overheat protector and protection methodology for electrodynamic loudspeakers | |
US20130077795A1 (en) | Over-Excursion Protection for Loudspeakers | |
US9648432B2 (en) | Method of controlling sound reproduction of enclosure mounted loudspeakers | |
US9609450B2 (en) | Method and system for monitoring speaker temperature for speaker protection | |
EP2773132A1 (en) | Method and detector of loudspeaker diaphragm excursion | |
US7920822B2 (en) | Device for preventing eavesdropping through speaker | |
US9967665B2 (en) | Adaptation of dynamic range enhancement based on noise floor of signal | |
US8494185B2 (en) | Electro-acoustic transducer tuning and data storage | |
KR20140055932A (ko) | 상이한 이퀄라이저 모드들 사이에 출력음 크기와 음질을 유지하기 위한 장치 및 방법 | |
KR20070104897A (ko) | 향상된 음향 재생을 위한 오디오 디바이스 | |
KR20190003594A (ko) | 오디오 증폭기에서 예측 스위칭하기 위한 시스템 및 방법 | |
US9204217B2 (en) | Microphone filter system | |
KR20150002730U (ko) | 음향파 초음파를 이용한 사운드 마스킹에 의한 녹음.도청 차단,방지방법 및 장치 | |
JP2009065550A (ja) | 電子ボリウム装置およびそれを用いたオーディオ機器、ならびに異常検出方法 | |
JP4938061B2 (ja) | スピーカーの微弱信号漏洩遮断装置 | |
Roy et al. | Backdoor: Sounds that a microphone can record, but that humans can't hear | |
KR101858559B1 (ko) | 스피커 장치 | |
US20120224717A1 (en) | Audio cable capable of increasing gain and filtering noise | |
JP5263543B2 (ja) | ダイナミックスピーカーの歪低減方式 | |
US9859860B1 (en) | Compressor system with EQ | |
TWI385885B (zh) | 多媒體裝置以及音量控制方法 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20110812 |
|
RD13 | Notification of appointment of power of sub attorney |
Free format text: JAPANESE INTERMEDIATE CODE: A7433 Effective date: 20110823 |
|
A521 | Written amendment |
Free format text: JAPANESE INTERMEDIATE CODE: A821 Effective date: 20110823 |
|
A521 | Written amendment |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20111028 |
|
TRDD | Decision of grant or rejection written | ||
A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20120214 |
|
A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 |
|
A61 | First payment of annual fees (during grant procedure) |
Free format text: JAPANESE INTERMEDIATE CODE: A61 Effective date: 20120222 |
|
FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20150302 Year of fee payment: 3 |
|
R150 | Certificate of patent or registration of utility model |
Free format text: JAPANESE INTERMEDIATE CODE: R150 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
LAPS | Cancellation because of no payment of annual fees |