CN102395077A - Anti-interference earphone - Google Patents
Anti-interference earphone Download PDFInfo
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- CN102395077A CN102395077A CN2011103752374A CN201110375237A CN102395077A CN 102395077 A CN102395077 A CN 102395077A CN 2011103752374 A CN2011103752374 A CN 2011103752374A CN 201110375237 A CN201110375237 A CN 201110375237A CN 102395077 A CN102395077 A CN 102395077A
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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 the player audio signal, especially relate to a kind of anti-interference earphone.
Background technology
People often run into such a case when using earphone, when occurring a very big background noise suddenly, do not hear the content of the inside.And this situation is for some professionals; Possibly not hope to take place; As in the process of personnel in charge of the case's action, get in touch through earphone and Mike usually, as run into the situation that environment produces powerful noise suddenly; Usually do not hear the information that connects each other, affected the best adversely and handled a case opportunity; Also as on airport, satellite launch center, the fighter plane, under the complex environment such as street fighting, anti-interference earphone maybe be more useful.
Summary of the invention
The objective 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 along with the increase of ambient noise automatically, improves the interference free performance of earphone.
The present invention is the deficiency that solves the problems of the technologies described above; The technical scheme that is adopted is: a kind of anti-interference earphone, comprise audio input interface, audio output interface and loud speaker composition, and also be provided with a controller of adjusting the audio signal increase with the increase of ambient noise intensity automatically; The audio signal input controller; Via controller is handled after audio output interface also through loud speaker output, also is provided with adjusting knob, the ratio of adjusting knob adjustment audio frequency intensity and noise intensity on controller.
Described controller mainly is made up of than regulating circuit, system power supply circuit and audio control circuit with noise intensity microphone amplifying circuit, voltage follower circuit, filter rectifier, audio frequency intensity; Audio frequency intensity compares regulating circuit with noise intensity; Its main control chip is a single-chip microcomputer; Audio signal converts voltage signal into and inputs in the single-chip microcomputer, and while noise signal output voltage signal behind the microphone amplifying circuit, this signal input to single-chip microcomputer through voltage follower circuit, filter rectifier after handling successively; 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, the intensity of adjustment audio frequency output.
Principle of the present invention is following: utilize noise signal intensity relevant with the amplitude of its sound wave; Noise signal carries out power conversion through microphone; Single-chip microcomputer uses self the integrated magnitude of voltage of A/D converter collection after the translation filtering rectification and the audio frequency and the noise intensity ratio that preset; And then after routine processes the manipulation of audio controller, increase with the external environment noise level to realize earpiece audio intensity.
The invention has the beneficial effects as follows:
Through controller is set in earphone; This controller can be adjusted the output intensity of audio signal automatically according to the noise intensity in the external world; The audio frequency that is to say the earphone the inside can increase and (the noncontinuity classification increase of increase automatically with noise intensity; Can not cause audio signal to change distortion) because of noise intensity signal high frequency; Audio frequency intensity and noise intensity ratio can be regulated through the knob variable resistor, and therefore going back earphone possesses good anti-interference, have improved the practicality of earphone under big noisy environment.
Description of drawings
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 is audio frequency intensity and the circuit diagram of noise intensity than regulating circuit.
Fig. 4 is the circuit diagram of audio control circuit.
Embodiment
As shown in the figure; A kind of anti-interference earphone comprises audio input interface, audio output interface and loud speaker composition, also is provided with a controller of adjusting the audio signal increase with the increase of ambient noise intensity automatically; The audio signal input controller; Controller is handled after audio output interface also through loud speaker output, also is provided with adjusting knob, the ratio of adjusting knob adjustment audio frequency intensity and noise intensity on controller.
Described controller is made up of than regulating circuit, clock circuit, system power supply circuit and audio control circuit with noise intensity microphone amplifying circuit, voltage follower circuit, filter rectifier, audio frequency intensity; Audio frequency intensity compares regulating circuit with noise intensity; Its main control chip is a single-chip microcomputer; Audio signal converts voltage signal into and inputs in the single-chip microcomputer, and while noise signal output voltage signal behind the microphone amplifying circuit, this signal input to single-chip microcomputer through voltage follower circuit, filter rectifier after handling successively; 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, the intensity of adjustment audio frequency output.
As shown in Figure 2, described microphone amplifying circuit mainly is made up of microphone signal input, capacitor C 1 and triode Q1, and the noise signal that microphone receives divides two-way output; One tunnel ground connection; Two branch roads are divided on another road, and a branch road is connected with power supply through resistance R 1, and another branch road inputs to the base stage of triode Q1 through capacitor C 1; The collector electrode of triode Q1 is connected with power supply through resistance R 3; The grounded emitter of triode Q1 also and be connected to resistance R 2, inputs to voltage follower circuit through the collector electrode output voltage signal of triode Q1 between the collector electrode of triode Q1 and base stage; Described voltage follower circuit is provided with integrated amplifier and feedback resistance R5; In the described filter rectifier; The signal of input exports voltage ratio to than decision circuit through resistance R 4, diode D0 and resistance R 7 successively; The negative pole of diode D0 is through parallel resistor R6 and capacitor C 2 ground connection, and the output of filter rectifier is through capacitor C 3 ground connection; Signal processing is detailed: ambient noise has microphone MIC to convert the faint signal of telecommunication to, amplifies the voltage signal that converts the band direct current biasing to through triode Q1 again.This signal is imported by integrated amplifier LM207H positive; The anti-phase input resistance of integrated amplifier is infinitely great with its feedback resistance ratio; Just become a voltage follower; The output again that input voltage signal is unalterable, but increased the driving force (equivalent internal resistance becomes very little) of noise voltage signal.Voltage process resistance R 4 and flexible capacitor C 2 is charged of diode D0 by voltage follower output form the single phase half wave rectification filter circuit.Voltage behind the rectifying and wave-filtering is the low pass filter through being made up of R7 and C3 again, sends to Chip Microcomputer A conversion mouth, 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 and noise intensity are than regulating circuit and clock circuit, and its main control chip is single-chip microcomputer STC125201AD, self integrated 8 tunnel 10 high-speed A, and operating voltage is 5V.Said audio frequency intensity is potentiometer R2 bleeder circuit with noise intensity than regulating circuit, and its two extreme one connects positive source, and one connects power cathode.The middle voltage grading electrode of R2 meets a Chip Microcomputer A conversion mouthful P1.3, reads in the single-chip microcomputer internal RAM after making the magnitude of voltage conversion digital signal of adjusting, and single-chip microcomputer is handled altogether.In like manner; Noise signal voltage is through Chip Microcomputer A conversion mouthful P1.0 conversion input voltage Value Data, and these two data-signals of single-chip microcomputer integrated treatment are made audio frequency strength control decision-making (grading control; After judging that noise signal reaches a rank intensity, just change the audio frequency output intensity.When noise signal a certain when fluctuating among a small circle, the order of audio frequency control intensity is constant), and control command sent to Audio Controller M62429.Said clock circuit is a 11.0592Mhz crystal oscillator and two single-chip microcomputer clock circuits that 30p electric capacity is formed.Said system voltage circuit is made up of one 7805 regulator block and 3 electric capacity.Capacitor C 6 values are less, the wave component of filtering voltage medium-high frequency.
As shown in Figure 4; Said audio control circuit is provided with an Audio Controller M62429 and peripheral circuit is formed; DAT, CLA are the control line of this chip; Be connected on single-chip processor i/o P3.3 and the P3.4, single-chip microcomputer changes the intensity of audio frequency output through its control command being come the operating audio controller.
Claims (2)
1. anti-interference earphone; Comprise audio input interface, audio output interface and loud speaker composition; It is characterized in that: also be provided with one and increase with ambient noise intensity and adjust the controller that audio signal increases automatically, audio signal input controller, via controller handle after audio output interface and through loud speaker output; On controller, also be provided with adjusting knob, the ratio of adjusting knob adjustment audio frequency intensity and noise intensity.
2. a kind of anti-interference earphone according to claim 1; It is characterized in that: described controller mainly is made up of than regulating circuit, system power supply circuit and audio control circuit with noise intensity microphone amplifying circuit, voltage follower circuit, filter rectifier, audio frequency intensity; Audio frequency intensity and noise intensity are than regulating circuit, and its main control chip is a single-chip microcomputer, and audio signal converts voltage signal into and inputs in the single-chip microcomputer; While noise signal output voltage signal behind the microphone amplifying circuit; This signal inputs to single-chip microcomputer through voltage follower circuit, filter rectifier after handling successively, and these two data-signals of single-chip microcomputer integrated treatment are made the decision-making of audio frequency strength control; And control command sent to audio control circuit, the intensity of adjustment audio frequency output.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110375237.4A CN102395077B (en) | 2011-11-23 | 2011-11-23 | Anti-interference earphone |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110375237.4A CN102395077B (en) | 2011-11-23 | 2011-11-23 | Anti-interference earphone |
Publications (2)
| Publication Number | Publication Date |
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| CN102395077A true CN102395077A (en) | 2012-03-28 |
| CN102395077B CN102395077B (en) | 2014-05-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201110375237.4A Expired - Fee Related CN102395077B (en) | 2011-11-23 | 2011-11-23 | Anti-interference earphone |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN107749306A (en) * | 2017-10-31 | 2018-03-02 | 维沃移动通信有限公司 | A kind of method and mobile terminal for vibrating optimization |
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 |
-
2011
- 2011-11-23 CN CN201110375237.4A patent/CN102395077B/en not_active Expired - Fee Related
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 |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN107749306A (en) * | 2017-10-31 | 2018-03-02 | 维沃移动通信有限公司 | A kind of method and mobile terminal for vibrating optimization |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102395077B (en) | 2014-05-07 |
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