CN102395077B - Anti-interference earphone - Google Patents
Anti-interference earphone Download PDFInfo
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- CN102395077B CN102395077B CN201110375237.4A CN201110375237A CN102395077B CN 102395077 B CN102395077 B CN 102395077B CN 201110375237 A CN201110375237 A CN 201110375237A CN 102395077 B CN102395077 B CN 102395077B
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Abstract
The invention relates to an anti-interference earphone, which comprises an audio input interface, an audio output interface and a loudspeaker. The anti-interference earphone is characterized in that the earphone is also provided with a controller that is capable of automatically adjusting increase of an audio signal as intensity increasement of ambient noises. An audio signal is input in the controller; after the signal is processed by the controller, the processed signal is output through the audio output interface and by the loudspeaker. According to the invention, the controller is arranged in the earphone and the controller can automatically adjust an output intensity of an audio signal according to an intensity of an ambient noise; that is, the audio frequency in the earphone can be automatically increased as the noise intensity is increased; and because the increase of the audio frequency is not continuous grading increase, so that the audio signal will not be distorted due to a high frequency change of the noise intensity signal. Besides, a ratio of the audio intensity to the noise intensity can be adjusted by a variable resistor of a knob. Therefore, the earphone has a good anti-interference performance and practicality of the earphone in an environment with loud noises can be improved.
Description
Technical field
The present invention relates to a kind of earphone of exporting player audio signal, especially relate to a kind of Anti-interference earphone.
Background technology
People often run into such a case using in earphone, when there is suddenly a very large background noise, do not hear the content of the inside.And this situation is for some professionals, may be not wish to occur, as in the process of personnel in charge of the case's action, conventionally by earphone and Mike, contact, as run into environment and produce suddenly the situation of powerful noise, conventionally do not hear the information connecting each other, affected the best adversely and handled a case opportunity; Also as on airport, satellite launch center, fighter plane, under the complex environment such as street fighting, Anti-interference earphone may be more useful.
Summary of the invention
The object of the invention is the deficiency for solving the problems of the technologies described above, a kind of Anti-interference earphone is provided, the audio signal of this earphone output increases automatically along with the increase of ambient noise, improves the interference free performance of earphone.
The present invention is the deficiency solving the problems of the technologies described above, the technical scheme adopting is: a kind of Anti-interference earphone, comprise audio input interface, audio output interface and loud speaker composition, also being provided with one increases and the controller of automatic regulating audio signal increase with ambient noise intensity, audio signal input control device, via controller is exported through audio output interface and by loud speaker after processing, and is also provided with adjusting knob on controller, and adjusting knob is adjusted the ratio of audio frequency intensity and noise intensity.
Described controller is mainly by microphone amplifying circuit, voltage follower circuit, filter rectifier, audio frequency intensity compares regulating circuit with noise intensity, system power supply circuit and audio control circuit composition, audio frequency intensity compares regulating circuit with noise intensity, its main control chip is single-chip microcomputer, audio signal is converted to voltage signal and inputs in single-chip microcomputer, noise signal output voltage signal after microphone amplifying circuit simultaneously, this signal is successively through voltage follower circuit, filter rectifier inputs to single-chip microcomputer after processing, these two data-signals of single-chip microcomputer integrated treatment, make the decision-making of audio frequency strength control, and control command is sent to audio control circuit, adjust the intensity of audio frequency output.
Principle of the present invention is as follows: utilize noise signal intensity relevant with its sound wave amplitude, noise signal carries out power conversion by microphone, audio frequency and noise intensity ratio that single-chip microcomputer uses the magnitude of voltage of self integrated A/D converter collection after translation filtering rectification and presets, and then after routine processes manipulation of audio controller, with realize earpiece audio intensity external environment noise level increase and increase.
The invention has the beneficial effects as follows:
By controller is set in earphone, this controller can be according to the output intensity of extraneous noise intensity automatic regulating audio signal, the audio frequency that is to say earphone the inside can increase and (the noncontinuity classification increase of increase automatically with noise intensity, can not cause audio signal because of noise intensity signal high frequency variation distortion), audio frequency intensity and noise intensity ratio can regulate by knob variable resistor, therefore go back earphone and possess good anti-interference, improved the practicality of earphone under larger noisy environment.
Accompanying drawing explanation
Fig. 1 is the theory diagram of middle controller of the present invention.
Fig. 2 is the circuit diagram of microphone amplifying circuit, voltage follower circuit and filter rectifier.
Fig. 3 be audio frequency intensity with noise intensity than the circuit diagram of regulating circuit.
Fig. 4 is the circuit diagram of audio control circuit.
Embodiment
As shown in the figure, a kind of Anti-interference earphone, comprise audio input interface, audio output interface and loud speaker composition, also being provided with one increases and the controller of automatic regulating audio signal increase with ambient noise intensity, audio signal input control device, controller is exported through audio output interface and by loud speaker after processing, and is also provided with adjusting knob on controller, and adjusting knob is adjusted the ratio of audio frequency intensity and noise intensity.
Described controller is by microphone amplifying circuit, voltage follower circuit, filter rectifier, audio frequency intensity compares regulating circuit with noise intensity, clock circuit, system power supply circuit and audio control circuit composition, audio frequency intensity compares regulating circuit with noise intensity, its main control chip is single-chip microcomputer, audio signal is converted to voltage signal and inputs in single-chip microcomputer, noise signal output voltage signal after microphone amplifying circuit simultaneously, this signal is successively through voltage follower circuit, filter rectifier inputs to single-chip microcomputer after processing, these two data-signals of single-chip microcomputer integrated treatment, make the decision-making of audio frequency strength control, and control command is sent to audio control circuit, adjust the intensity of audio frequency output.
As shown in Figure 2, described microphone amplifying circuit is mainly by microphone signal input, capacitor C 1 and triode Q1 composition, the noise signal that microphone receives divides two-way output, one tunnel ground connection, two branch roads are divided on another road, article one, branch road is connected with power supply by resistance R 1, another branch road inputs to the base stage of triode Q1 by capacitor C 1, the collector electrode of triode Q1 is connected with power supply by resistance R 3, the grounded emitter of triode Q1, between the collector electrode of triode Q1 and base stage, go back and be connected to resistance R 2, collector electrode output voltage signal through triode Q1 inputs to voltage follower circuit, described voltage follower circuit is provided with integrated amplifier and feedback resistance R5, in described filter rectifier, the signal of input exports voltage ratio to compared with decision circuit through resistance R 4, diode D0 and resistance R 7 successively, the negative pole of diode D0 is by resistance R in parallel 6 and capacitor C 2 ground connection, and the output of filter rectifier is by capacitor C 3 ground connection, signal processing is described in detail in detail: ambient noise has microphone MIC to convert the faint signal of telecommunication to, then amplifies through triode Q1 the voltage signal converting to direct current biasing.This signal is inputted by integrated amplifier LM207H positive, the anti-phase input resistance of integrated amplifier and its feedback resistance ratio infinity, just become a voltage follower, by unalterable input voltage signal exporting again, but increased the driving force (equivalent internal resistance becomes very little) of noise voltage signal.The voltage of being exported by voltage follower charges to capacitor C 2 through resistance R 4 and diode D0 flexibility, forms single phase half wave rectification filter circuit.Voltage after rectifying and wave-filtering is the low pass filter through being comprised of R7 and C3 again, sends to Chip Microcomputer A/D conversion mouthful, and R6 is the load of capacitor C 2, and its size has determined the velocity of discharge of C2.
As shown in Figure 3, described audio frequency intensity is with noise intensity than regulating circuit and clock circuit, and its main control chip is single-chip microcomputer STC125201AD, self 10 high-speed A/D converter in integrated 8 tunnel, and operating voltage is 5V.Described audio frequency intensity is potentiometer R2 bleeder circuit with noise intensity than regulating circuit, and two extreme one connects positive source, and one connects power cathode.The middle voltage grading electrode of R2 meets Chip Microcomputer A/D conversion mouthful P1.3, reads in single-chip microcomputer internal RAM single-chip microcomputer processing altogether after the magnitude of voltage conversion digital signal that makes to regulate.In like manner, noise signal voltage is changed a mouthful P1.0 conversion input voltage Value Data by Chip Microcomputer A/D, and these two data-signals of single-chip microcomputer integrated treatment, make audio frequency strength control decision-making (grading control, judge that noise signal reaches after a rank intensity, just changes audio frequency output intensity.When noise signal is a certain while fluctuating among a small circle, the order of audio frequency control intensity is constant), and control command is sent to Audio Controller M62429.Described clock circuit is the Singlechip clock circuit of a 11.0592Mhz crystal oscillator and two 30p electric capacity compositions.Described system voltage circuit is comprised of 7805 regulator blocks and 3 electric capacity.Capacitor C 6 is worth less, the wave component of filtering voltage medium-high frequency.
As shown in Figure 4, described audio control circuit is provided with an Audio Controller M62429 and peripheral circuit composition thereof, DAT, CLA are the control line of this chip, be connected to single-chip processor i/o P3.3 and P3.4 upper, single-chip microcomputer changes the intensity of audio frequency output by its control command being carried out to operating audio controller.
Claims (1)
1. an Anti-interference earphone, comprise audio input interface, audio output interface and loud speaker, also being provided with one increases and the controller of automatic regulating audio signal increase with ambient noise intensity, the described controller of audio signal input, via controller is exported through audio output interface and by loud speaker after processing, on controller, be also provided with adjusting knob, adjusting knob is adjusted the ratio of audio frequency intensity and noise intensity, described controller is mainly by microphone amplifying circuit, voltage follower circuit, filter rectifier, audio frequency intensity compares regulating circuit with noise intensity, system power supply circuit and audio control circuit composition, audio frequency intensity compares regulating circuit with noise intensity, its main control chip is single-chip microcomputer, audio signal is converted to voltage signal and inputs in single-chip microcomputer, noise signal output voltage signal after microphone amplifying circuit simultaneously, this signal is successively through voltage follower circuit, filter rectifier inputs to single-chip microcomputer after processing, these two data-signals of single-chip microcomputer integrated treatment, make the decision-making of audio frequency strength control, and control command is sent to audio control circuit, adjust the intensity of audio frequency output, it is characterized in that:
Described audio frequency intensity compares regulating circuit with noise intensity, its main control chip is single-chip microcomputer STC125201AD, self 10 high-speed A/D converter in integrated 8 tunnel, operating voltage is 5V, described audio frequency intensity is potentiometer R2 bleeder circuit with noise intensity than regulating circuit, two of described potentiometer R2 bleeder circuit are extreme, one connects positive source, another one connects power cathode, the middle voltage grading electrode of R2 meets Chip Microcomputer A/D conversion mouthful P1.3, after the magnitude of voltage conversion digital signal that makes to regulate, read in single-chip microcomputer internal RAM, for single-chip microcomputer processing, noise signal voltage is changed a mouthful P1.0 conversion input voltage Value Data by Chip Microcomputer A/D, these two data-signals of single-chip microcomputer integrated treatment, realize grading control, judge that noise signal reaches after a rank intensity, just change audio frequency output intensity, when noise signal is a certain while fluctuating among a small circle, the order of audio frequency control intensity is constant, make the decision-making of audio frequency strength control, and control command is sent to Audio Controller.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110375237.4A CN102395077B (en) | 2011-11-23 | 2011-11-23 | Anti-interference earphone |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201110375237.4A CN102395077B (en) | 2011-11-23 | 2011-11-23 | Anti-interference earphone |
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| CN102395077A CN102395077A (en) | 2012-03-28 |
| CN102395077B true CN102395077B (en) | 2014-05-07 |
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| CN201110375237.4A Expired - Fee Related CN102395077B (en) | 2011-11-23 | 2011-11-23 | Anti-interference earphone |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105554605A (en) * | 2015-12-11 | 2016-05-04 | 天津七一二通信广播有限公司 | Circuit for automatically adjusting volume of Bluetooth earphone and implementation method |
| CN107749306B (en) * | 2017-10-31 | 2020-01-21 | 维沃移动通信有限公司 | Vibration optimization method and mobile terminal |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102088648A (en) * | 2009-12-03 | 2011-06-08 | 奥迪康有限公司 | Method for dynamic suppression of surrounding acoustic noise when listening to electrical inputs |
| CN201904917U (en) * | 2010-12-24 | 2011-07-20 | 深圳市嘉兰图设计有限公司 | Hearing aid earphone |
| CN201937801U (en) * | 2010-12-29 | 2011-08-17 | 上海华勤通讯技术有限公司 | Automatic volume adjusting Bluetooth headset |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102088648A (en) * | 2009-12-03 | 2011-06-08 | 奥迪康有限公司 | Method for dynamic suppression of surrounding acoustic noise when listening to electrical inputs |
| CN201904917U (en) * | 2010-12-24 | 2011-07-20 | 深圳市嘉兰图设计有限公司 | Hearing aid earphone |
| CN201937801U (en) * | 2010-12-29 | 2011-08-17 | 上海华勤通讯技术有限公司 | Automatic volume adjusting Bluetooth headset |
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| CN102395077A (en) | 2012-03-28 |
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