CN101227759B - Earphone device with automatic volume control function - Google Patents
Earphone device with automatic volume control function Download PDFInfo
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- CN101227759B CN101227759B CN 200710036464 CN200710036464A CN101227759B CN 101227759 B CN101227759 B CN 101227759B CN 200710036464 CN200710036464 CN 200710036464 CN 200710036464 A CN200710036464 A CN 200710036464A CN 101227759 B CN101227759 B CN 101227759B
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Abstract
The invention discloses a headphone device with automatic volume control function, which comprises a headphone loudspeaker which is used for playing audios, a microphone which is near the headphone loudspeaker and is used to collect environmental sound near ears, an environmental sound analysis module which is connected with the microphone and is used to receive environmental sound signals which is collected by the microphone and process the signals, a volume control module which is connected with the environmental sound analysis module and the headphone loudspeaker and is used to receive analyzing results of the environmental sound analysis module and control volume which is outputted by the headphone loudspeaker and whether the sound is muted or not. The invention can accurately catch the environmental sound which is listened by the ears, thereby control the volume of sound which is input by the headphone, and exclude the influence of the environmental sound to headphone playing.
Description
Technical field
The present invention relates to a kind of Headphone device, relate in particular to a kind of Headphone device with automatic volume control function, can be according to the external environment automatic regulating volume, its application includes but not limited to various portable set, mobile communication equipments with audio playing function.
Background technology
The development of digital technology brings great convenience to people.Along with popularizing of the portable sets such as Mp 3 player, have on earphone and walk, listoning music is just becoming a kind of trend whenever and wherever possible.Yet external environment is changeable, and The clamors of the people bubble up on the road, and very quiet in the library.Use same volume music playing, may can not hear clearly in the place that the sound of environment (hereinafter to be referred as ambient sound) is noisy around, (people's ear is when hearing that earphone plays sound, also will hear ambient sound, during two kinds of sound mix, can make the people be not easy to catch the sound that earphone is play), and may seem that in the very quiet place of environment volume is excessive, this just needs people constantly to remove manually to adjust the volume of player, and is very loaded down with trivial details.If a kind of earphone can be arranged, can according to the volume of the automatic regulation output sound of noise degree of environment, should provide convenience to people.
At present, provide the device of similar functions also rarely found.Chinese invention patent application prospectus CN1507293A discloses a kind of intelligent method of regulating the device for mobile communication earpiece volume, utilizes the microphone on the mobile phone to judge the size of ambient sound, thereby adjusts the volume of microphone and loud speaker.But this device only can be for mobile phone communication, is not suitable for the occasion such as listen to the music, and utilizes the microphone of mobile phone communication to come testing environment sound, can't distinguish the sound of ambient sound and people's conversation, is difficult for the ambient sound size made accurately judging.
Summary of the invention
The technical problem to be solved in the present invention provides a kind of Headphone device with automatic volume control function, and it can catch the ambient sound that people's ear is heard exactly, and then the volume of control earphone output sound, gets rid of the impact that ambient sound is play earphone.
For solving the problems of the technologies described above, the Headphone device that the present invention has automatic volume control function comprises:
Earphone speaker is used for playing sound;
Microphone is used for gathering ambient sound;
The ambient sound analysis module is connected with microphone, receives the environmental sound signal that microphone collects, and processes;
Volume control module is connected with earphone speaker with the ambient sound analysis module, the analysis result of reception environment sound analysis module, and according to the volume of this analysis result control earphone speaker output and whether quiet.
Beneficial effect of the present invention is: the impact of earphone being play in order to get rid of ambient sound, the present invention position (place of close people's ear when namely wearing earphone) near loud speaker on earphone adds an auxiliary microphone, thereby can most accurately catch the ambient sound that people's ear is heard, and then the volume of control earphone output sound.The present invention can gather the periotic ambient sound of people in real time, and analyzes its content: when the ambient sound volume is large, improve the volume that earphone plays sound, make the people listen clearlyer; In ambient sound volume hour, reduce earphone and play sound, with protection people's hearing; When emergency case occurring, earphone is quiet, make the people can not listen to the music and divert attention because wearing earphone, thereby avoid accidents.
Description of drawings
Fig. 1 is the system architecture diagram that the present invention has the Headphone device of automatic volume control function;
Fig. 2 is the internal structure schematic diagram that the present invention has ambient sound analysis module in the Headphone device of automatic volume control function.
Embodiment
Below in conjunction with drawings and Examples the present invention is described in more detail.
As shown in Figure 1, the Headphone device that the present invention has automatic volume control function comprises: microphone, ambient sound analysis module, volume control module, earphone speaker.Wherein, microphone is used for gathering ambient sound; Whether the environmental sound signal that collects is admitted to the ambient sound analysis module and processes, and the ambient sound when current environment sound and user were adjusted volume last time is compared, and judges the situation of change of ambient sound, should be with the volume change of earphone output thereby determine; The analysis result of ambient sound analysis module is admitted to volume control module, the volume that plays sound to regulate earphone speaker; Sound after the volume control module adjustment is output to earphone speaker and broadcasts.
Microphone act as the ambient sound that recorder's ear is heard.Obviously, in order to record more accurately ambient sound, the putting position of microphone should be positioned as close to people's ear.Because earphone speaker is close to people's ear, this just means that also microphone and earphone speaker should try one's best near (shown in dotted line frame among Fig. 1), makes the close people's ear of people's Mike's wind energy when wearing earphone, thus the ambient sound heard of recorder more accurately.But it should be noted that also between microphone and the earphone speaker that certain quarantine measures should be arranged simultaneously, caught by microphone with the sound of avoiding earphone speaker to be play.
The internal structure of ambient sound analysis module as shown in Figure 2, it is made of two essential unit (history environment volume memory cell, environmental volume judging unit) and an optional unit (emergency case judging unit).Wherein, the function of history environment volume memory cell is the ambient sound volume of preserving when the user is last to adjust earpiece volume, with the judgment standard that changes as ambient sound.When the user just start shooting, when not yet adjusting volume, the ambient sound volume when start is preserved in this unit.
The function of environmental volume judging unit is to calculate the ambient sound volume of current input according to input signal, and the ambient sound volume that the user that itself and history environment volume memory cell are preserved is last when adjusting volume is compared.If current environmental volume is higher, illustrate that environment becomes noisy, the volume that needs to improve the earphone broadcast could allow the people catch; Otherwise then should reduce the volume that earphone is play.The amplitude (comprise situation that volume constant) of the judged result of this unit for specifically the earphone broadcast sound volume being raise/reduce, and be sent to volume control module.
Optional emergency case judging unit is used for input signal and some predefined accident features are compared, to judge whether to have occured dangerous situation that need to earphone is quiet.The people will slow up to the perception of other sound in listoning music, during the dangerous generation of environment, may damage because having little time to hide around.The function of this unit is the monitoring of environmental acoustical signal, and is when default accident feature occurs that earphone is quiet rapidly, so that the people steps up vigilance to danger potential in the environment.The setting of accident feature can according to the specific environment setting, include but not limited to following content:
Environmental volume sharply rises;
Environmental volume is greater than certain threshold;
The language spectrum signature that occurs the specific sound voice signals such as " danger ", " carefully " in the ambient sound;
……
In case accident is triggered, the emergency case judging unit will send mute signal to volume control module.
This ambient sound analysis module both can be realized with analog circuit, also can realize with software programming after analog-to-digital conversion.Especially, detect if realize the voice spectrum of specific sound (such as " danger ", " carefully " etc.), then general method with software programming after the analog-to-digital conversion realizes.
The function of volume control module is to adjust signal according to the volume of ambient sound analysis module output to adjust the volume that earphone speaker plays sound.Especially, when the ambient sound analysis module has mute signal to send, volume control module will be ignored volume and adjust signal, and will be directly that earphone is quiet.In addition, this module can also be accepted the manual volume control signal (as shown in Figure 1) of extraneous input, adjusts volume to make things convenient for the user.When each user manually adjusted volume, this module should send a cue to the ambient sound analysis module, so that the latter begins to record current ambient sound volume (referring to the description of history environment volume memory cell).This volume control module both can be realized with analog circuit, also available digital method realization.For the latter, mainly refer to before digital-to-analogue conversion, digital audio and video signals be carried out scaling, thereby realize the processing method that volume controls.
The position can be flexible and changeable when above-mentioned volume control module and ambient sound analysis module were realized at device, both can be positioned near the earphone speaker, portable set one side that also can insert near earphone, even can place among the portable set, become the part of portable set.
Claims (8)
1. the Headphone device with automatic volume control function is characterized in that, comprising:
Earphone speaker is used for playing sound;
Microphone is used for gathering ambient sound;
The ambient sound analysis module is connected with microphone, receives the environmental sound signal that microphone collects, and processes; Described ambient sound analysis module comprises: history environment volume memory cell is used for the ambient sound volume when the record user is last to adjust volume; The environmental volume judging unit, calculate the ambient sound volume of current input according to input signal, and the ambient sound volume that the user that itself and history environment volume memory cell are preserved is last when adjusting volume is compared, judge the variation of ambient sound, thereby determine it is that the volume that earphone speaker is played sound raises or reduction, still remain unchanged; The emergency case judging unit is used for input signal and some predefined accident features are compared, to judge whether to have occured dangerous situation that need to earphone is quiet;
Volume control module is connected with earphone speaker with the ambient sound analysis module, the analysis result of reception environment sound analysis module, and according to the volume of this analysis result control earphone speaker output and whether quiet.
2. the Headphone device with automatic volume control function as claimed in claim 1 is characterized in that, described microphone is near described earphone speaker, with near the ambient sound accurate recorder's ear.
3. the Headphone device with automatic volume control function as claimed in claim 1 is characterized in that, described accident feature includes but not limited to: environmental volume sharply rises; Environmental volume is greater than certain threshold; The language spectrum signature that occurs the specific sound voice signal in the ambient sound.
4. the Headphone device with automatic volume control function as claimed in claim 1 is characterized in that, described ambient sound analysis module is realized by analog circuit, perhaps realizes with software programming after analog-to-digital conversion.
5. the Headphone device with automatic volume control function as claimed in claim 4 is characterized in that, described ambient sound analysis module is realized with software programming after analog-to-digital conversion, detects with the voice spectrum of realizing specific sound.
6. such as claim 3 or 5 described Headphone devices with automatic volume control function, it is characterized in that, described specific sound comprises " danger ", " carefully ".
7. the Headphone device with automatic volume control function as claimed in claim 1, it is characterized in that, described volume control module is realized with analog circuit or digital method, described digital method refers to before digital-to-analogue conversion digital audio and video signals be carried out scaling, thereby realizes the processing method of volume control.
8. the Headphone device with automatic volume control function as claimed in claim 1, it is characterized in that, described volume control module and described ambient sound analysis module are positioned near the described earphone speaker, portable set one side of perhaps inserting near earphone perhaps places among the portable set, becomes the part of portable set.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 200710036464 CN101227759B (en) | 2007-01-15 | 2007-01-15 | Earphone device with automatic volume control function |
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| CN 200710036464 CN101227759B (en) | 2007-01-15 | 2007-01-15 | Earphone device with automatic volume control function |
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| CN101227759A CN101227759A (en) | 2008-07-23 |
| CN101227759B true CN101227759B (en) | 2013-01-23 |
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| CN 200710036464 Expired - Fee Related CN101227759B (en) | 2007-01-15 | 2007-01-15 | Earphone device with automatic volume control function |
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| CN102118665A (en) * | 2009-12-30 | 2011-07-06 | 北京华旗随身数码股份有限公司 | Automatic tuning device and method and multimedia player |
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