JPS56106494A - Method and device for howling prevention of loudspeaker - Google Patents
Method and device for howling prevention of loudspeakerInfo
- Publication number
- JPS56106494A JPS56106494A JP809780A JP809780A JPS56106494A JP S56106494 A JPS56106494 A JP S56106494A JP 809780 A JP809780 A JP 809780A JP 809780 A JP809780 A JP 809780A JP S56106494 A JPS56106494 A JP S56106494A
- Authority
- JP
- Japan
- Prior art keywords
- band
- loudspeaker
- howling
- equalizer
- output
- 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
Classifications
-
- 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
- H04R3/02—Circuits for transducers, loudspeakers or microphones for preventing acoustic reaction, i.e. acoustic oscillatory feedback
Landscapes
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Otolaryngology (AREA)
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Circuit For Audible Band Transducer (AREA)
Abstract
PURPOSE:To prevent the howling of a loudspeaker, by providing a band having a particularly large gain at the side of high band and outside the voice band to the frequency property of the system of amplification of the loudspeaker and then detecting the howling at this band to control the full frequency band of the amplification system. CONSTITUTION:The loudspeaker 1 consists of the microphone 3, preamplifier 4, volume 5, electric power amplifier 6 and speaker 7. The howling preventing device 2 is provided between the amplifier 4 and the volume 5. The device 2 includes the following component units: the equalizer 9 having the frequency property of a particularly large gain at the side of high band and outside the audible band; the level controller 10 which controls the output level of the equalizer 9 over the entire frequency band with the even attenuation quantity; the band pass filter 11 that extracts only the audible band out of the output of the equalizer 9; and the comparator 13 which transmits the control signal to the controller 10 when the output of the filter 11 exceeds the threshold level of the threshold level circuit 12.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP809780A JPS56106494A (en) | 1980-01-25 | 1980-01-25 | Method and device for howling prevention of loudspeaker |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP809780A JPS56106494A (en) | 1980-01-25 | 1980-01-25 | Method and device for howling prevention of loudspeaker |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS56106494A true JPS56106494A (en) | 1981-08-24 |
JPS628079B2 JPS628079B2 (en) | 1987-02-20 |
Family
ID=11683800
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP809780A Granted JPS56106494A (en) | 1980-01-25 | 1980-01-25 | Method and device for howling prevention of loudspeaker |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS56106494A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN105681976A (en) * | 2016-01-04 | 2016-06-15 | 恩平市亿歌电子有限公司 | Inaudible sound wave based microphone anti-howling method and system |
WO2021085174A1 (en) * | 2019-10-30 | 2021-05-06 | ソニー株式会社 | Voice processing device and voice processing method |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0274180U (en) * | 1988-11-28 | 1990-06-06 | ||
JPH08300267A (en) * | 1995-03-04 | 1996-11-19 | Sandoo:Kk | Pipe holder |
-
1980
- 1980-01-25 JP JP809780A patent/JPS56106494A/en active Granted
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN105681976A (en) * | 2016-01-04 | 2016-06-15 | 恩平市亿歌电子有限公司 | Inaudible sound wave based microphone anti-howling method and system |
WO2021085174A1 (en) * | 2019-10-30 | 2021-05-06 | ソニー株式会社 | Voice processing device and voice processing method |
Also Published As
Publication number | Publication date |
---|---|
JPS628079B2 (en) | 1987-02-20 |
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