CN201243374Y - Control device for regulating earphone sound volume - Google Patents
Control device for regulating earphone sound volume Download PDFInfo
- Publication number
- CN201243374Y CN201243374Y CNU2008200501791U CN200820050179U CN201243374Y CN 201243374 Y CN201243374 Y CN 201243374Y CN U2008200501791 U CNU2008200501791 U CN U2008200501791U CN 200820050179 U CN200820050179 U CN 200820050179U CN 201243374 Y CN201243374 Y CN 201243374Y
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- level
- gain amplifier
- audio signal
- controllable gain
- volume control
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Abstract
The utility model relates to an earphone volume adjusting and control device, comprising a manual volume adjusting potentiometer, a sampling detection circuit, a level comparison circuit and a controllable gain amplifier; wherein the manual volume adjusting potentiometer is used to adjust the audio frequency signal magnitude at an audio frequency input terminal; the sampling detection circuit samples the audio frequency signals adjusted by the manual volume adjusting potentiometer and then commutates and filters the sampled signals to convert AC signals into DC level; the level comparison circuit, provided with benchmark level inside, receives the DC level of the sampling detection circuit, compares the DC level with the benchmark level and sends comparison signals to the controllable gain amplifier; and the controllable gain amplifier amplifies or attenuates the audio frequency signals adjusted by the manual volume adjusting potentiometer according to the comparison signals. The earphone volume adjusting and control device can set the higher threshold of the playing volume of a loudspeaker at 80 Db to prevent a user from turning the volume to be too large unconsciously to listen for a long time, thus protecting the ears of the user.
Description
Technical field
The utility model relates to the audio signal processing technique field, relates in particular to a kind of volume control set for adjusting that is applied on the earphone.
Background technology
Along with popularizing of audio/video players such as Portable MP 3, MP4, IPOD, listening to the music with earphone becomes a kind of fashion, particularly universal in the teenager.Yet the concert of listening to of long-time big volume causes irreversible injury to people's hearing.Scientific research shows, when the volume of hearing when people's ear reached 100 decibels, the time can be caused the hearing impairment of irrecoverable property than length; When volume during up to 110 decibels, be enough to make the hair cell death of human body inner ear, severe patient also can cause the hearing disability illness.And the descant amount of MP3, MP4 can be big 120 decibels, and " loudly " plays the MP3 volume and can reach 110 decibels, this shows, listens to MP3, MP4 for a long time, is enough to people's hearing is damaged.
The utility model content
The utility model provides a kind of earpiece volume control set for adjusting at the above-mentioned defective of prior art, with the max volume of control earphone output.
In order to solve the problems of the technologies described above, the utility model is achieved through the following technical solutions:
A kind of earpiece volume control set for adjusting, be connected between audio signal input end and the earphone speaker, comprise manual volume regulator potentiometer, sampling detecting circuit, level comparison circuit, controllable gain amplifier, wherein: the manual volume regulator potentiometer is used for the audio signal size of audio signal input end is regulated;
The sampling detecting circuit is regulated the sampling of back audio signal to manual volume control potentiometer, then sampled signal is carried out rectifying and wave-filtering, converts AC signal to DC level;
Level comparison circuit, built-in reference level, receive the sampling detecting circuit DC level and with its with reference level relatively, export comparison signal to controllable gain amplifier;
Controllable gain amplifier, the audio signal after according to comparison signal manual volume control potentiometer being regulated gains or decays.
Preferably, if the DC level of detecting circuit is lower than reference level, the audio signal after then controllable gain amplifier is regulated manual volume control potentiometer is carried out gain-adjusted, otherwise the adjusting that decays.
Preferably, the voltage of the audio signal after the gain of described controllable gain amplifier has higher limit, and the audio signal volume after earphone speaker is play with this upper voltage limit is 80dB.
Preferably, described controllable gain amplifier enlargement ratio is 1/40～2.
As can be seen from the above technical solutions; the utility model controllable gain amplifier has upper gain limit; the volume of this upper gain limit value after loudspeaker plays is 80dB; when the audio signal of earphone input arrives to a certain degree greatly; even the manual volume regulator potentiometer of earphone is transferred big; sound is also transferred not quite, and this is listening to the excessive of volume accent unconsciously for a long time with regard to having been avoided, thereby has protected user's hearing.
Description of drawings
Accompanying drawing is the utility model theory diagram.
Embodiment
Below in conjunction with embodiment the utility model is described in further detail.
As everyone knows, the size of the sensitivity of the volume of earphone and the interior loud speaker of earphone and the audio signal of input loud speaker is relevant, wherein the sensitivity of loud speaker is certain to an earphone of having made, so the volume of earphone can be decided by the size of input loudspeaker audio signal.If like this size of the audio signal of input loud speaker is limited in the maximum of a safety, the volume of earphone also can be limited in the maximum of a safety.Any sound that is higher than 85 decibels can both cause hearing impairment, because the size of sound equipment is not only depended in this injury, and depends on the length of its time of contact.Therefore, the utility model is limited in max volume in the 80db.
The principle of the utility model being controlled the audio signal of input earphone speaker below in conjunction with accompanying drawing is further described: the utility model is connected between audio signal input end and the earphone speaker, it comprises manual volume regulator potentiometer 1, sampling detecting circuit 2, level comparison circuit 3, controllable gain amplifier 4, import audio signal of the present utility model and regulate back branch two-way through manual volume regulator potentiometer 1, one the tunnel enters 4 pairs of audio signals of controllable gain amplifier amplifies or dwindles, the multiplication factor of controllable gain amplifier is 1/40～2, another road enters sampling detecting circuit 2 and carries out detection, and produce one the reflection audio signal amplitude dc controling level, sampling detecting circuit 2 sends to level comparison circuit 3 with this dc controling level, level comparison circuit 3 reference level that this DC level and is built-in itself compares and draws comparison signal, according to the multiplication factor of this comparison signal control controllable gain amplifier 4.After if the maximum amplification of the audio frequency signal amplitude that this dc controling level reflected process controllable gain amplifier is 2 times, surmounted the even upper limit of being permitted of volume, then reduce the multiplication factor of controllable gain amplifier 4, the audio frequency signal amplitude of output is limited within the limits prescribed.This even upper limit of being permitted can be adjusted according to the height of the sensitivity of loud speaker, for example the earphone upper limit of sounding is set to 80db, at this moment import 0-4V, general sound source output can be controlled at the sound that earphone sends in the 80db with interior audio signal at 1V.When using the utility model, can find; when the audio signal of earphone input arrives to a certain degree greatly; the manual volume regulator potentiometer of earphone be transferred to a certain degree the back volume transfer little, this just avoided unconsciously volume transfer excessive, thereby protected hearing.
The above embodiment has only expressed several execution mode of the present utility model, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to the utility model claim.Should be pointed out that for the person of ordinary skill of the art under the prerequisite that does not break away from the utility model design, can also make some distortion and improvement, these all belong to protection range of the present utility model.Therefore, the protection range of the utility model patent should be as the criterion with claims.
Claims (3)
1, a kind of earpiece volume control set for adjusting is connected between audio signal input end and the earphone speaker, it is characterized in that, comprises that hand is robbed volume control potentiometer, take a sample detecting circuit, level comparison circuit, controllable gain amplifier, wherein:
The manual volume regulator potentiometer is used for the audio signal size of audio signal input end is regulated;
The sampling detecting circuit is regulated the sampling of back audio signal to manual volume control potentiometer, then sampled signal is carried out rectifying and wave-filtering, converts AC signal to DC level;
Level comparison circuit, built-in reference level, receive the sampling detecting circuit DC level and with its with reference level relatively, export comparison signal to controllable gain amplifier;
Controllable gain amplifier, the audio signal after according to comparison signal manual volume control potentiometer being regulated gains or decays.
2, earpiece volume control set for adjusting according to claim 1, it is characterized in that: the voltage of the audio signal after the gain of described controllable gain amplifier has higher limit, and the audio signal volume after earphone speaker is play with this upper voltage limit is 80dB.
3, earpiece volume control set for adjusting according to claim 2 is characterized in that: described controllable gain amplifier enlargement ratio is 1/40～2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200501791U CN201243374Y (en) | 2008-07-02 | 2008-07-02 | Control device for regulating earphone sound volume |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200501791U CN201243374Y (en) | 2008-07-02 | 2008-07-02 | Control device for regulating earphone sound volume |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201243374Y true CN201243374Y (en) | 2009-05-20 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200501791U Expired - Fee Related CN201243374Y (en) | 2008-07-02 | 2008-07-02 | Control device for regulating earphone sound volume |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201243374Y (en) |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012151839A1 (en) * | 2011-07-18 | 2012-11-15 | 中兴通讯股份有限公司 | Method and device for automatically adjusting sound volume |
| CN104092443A (en) * | 2014-07-03 | 2014-10-08 | 中国矿业大学(北京) | Automatic gain control circuit used for electrical prospecting |
| CN105808201A (en) * | 2016-03-08 | 2016-07-27 | 广东欧珀移动通信有限公司 | Terminal equipment headset volume control method and system and intelligent terminal |
| CN106303813A (en) * | 2015-05-15 | 2017-01-04 | 杭州纳雄科技有限公司 | A kind of head circuit and control method thereof |
| CN108574467A (en) * | 2017-03-14 | 2018-09-25 | 瑟恩森知识产权控股有限公司 | The relevant automatic growth control of volume |
| CN109275068A (en) * | 2018-08-27 | 2019-01-25 | 出门问问信息科技有限公司 | A kind of audio output circuit and equipment |
| US10888668B2 (en) | 2015-06-03 | 2021-01-12 | Sanofi-Aventis Deutschland Gmbh | Drug delivery device |
| US10918811B2 (en) | 2015-06-03 | 2021-02-16 | Sanofi-Aventis Deutschland Gmbh | Audible indicator |
| US10926032B2 (en) | 2015-06-03 | 2021-02-23 | Sanofi-Aventis Deutschland Gmbh | Audible indicator |
| US11357922B2 (en) | 2015-06-03 | 2022-06-14 | Sanofi-Aventis Deutschland Gmbh | Audible indicator for a drug delivery device |
| US11400232B2 (en) | 2017-11-03 | 2022-08-02 | Sanofi | Drug delivery device |
| US11654246B2 (en) | 2017-11-03 | 2023-05-23 | Sanofi | Drug delivery device |
| US12102812B2 (en) | 2015-06-03 | 2024-10-01 | Sanofi-Aventis Deutschland Gmbh | Audible indicator |
-
2008
- 2008-07-02 CN CNU2008200501791U patent/CN201243374Y/en not_active Expired - Fee Related
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012151839A1 (en) * | 2011-07-18 | 2012-11-15 | 中兴通讯股份有限公司 | Method and device for automatically adjusting sound volume |
| CN104092443A (en) * | 2014-07-03 | 2014-10-08 | 中国矿业大学(北京) | Automatic gain control circuit used for electrical prospecting |
| CN104092443B (en) * | 2014-07-03 | 2016-07-06 | 中国矿业大学(北京) | A kind of automatic gain control circuit for electrical prospecting |
| CN106303813B (en) * | 2015-05-15 | 2021-12-10 | 杭州纳雄科技有限公司 | Earphone circuit and control method thereof |
| CN106303813A (en) * | 2015-05-15 | 2017-01-04 | 杭州纳雄科技有限公司 | A kind of head circuit and control method thereof |
| US12102812B2 (en) | 2015-06-03 | 2024-10-01 | Sanofi-Aventis Deutschland Gmbh | Audible indicator |
| US11357922B2 (en) | 2015-06-03 | 2022-06-14 | Sanofi-Aventis Deutschland Gmbh | Audible indicator for a drug delivery device |
| US10888668B2 (en) | 2015-06-03 | 2021-01-12 | Sanofi-Aventis Deutschland Gmbh | Drug delivery device |
| US10918811B2 (en) | 2015-06-03 | 2021-02-16 | Sanofi-Aventis Deutschland Gmbh | Audible indicator |
| US10926032B2 (en) | 2015-06-03 | 2021-02-23 | Sanofi-Aventis Deutschland Gmbh | Audible indicator |
| CN105808201A (en) * | 2016-03-08 | 2016-07-27 | 广东欧珀移动通信有限公司 | Terminal equipment headset volume control method and system and intelligent terminal |
| CN108574467A (en) * | 2017-03-14 | 2018-09-25 | 瑟恩森知识产权控股有限公司 | The relevant automatic growth control of volume |
| US11400232B2 (en) | 2017-11-03 | 2022-08-02 | Sanofi | Drug delivery device |
| US11654246B2 (en) | 2017-11-03 | 2023-05-23 | Sanofi | Drug delivery device |
| CN109275068A (en) * | 2018-08-27 | 2019-01-25 | 出门问问信息科技有限公司 | A kind of audio output circuit and equipment |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090520 Termination date: 20100702 |