CN217363292U - 2.4G wireless earphone sound pressure limiting device - Google Patents
2.4G wireless earphone sound pressure limiting device Download PDFInfo
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- CN217363292U CN217363292U CN202221445862.1U CN202221445862U CN217363292U CN 217363292 U CN217363292 U CN 217363292U CN 202221445862 U CN202221445862 U CN 202221445862U CN 217363292 U CN217363292 U CN 217363292U
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Abstract
The utility model relates to an audio equipment technical field just discloses a 2.4G wireless earphone acoustic pressure limiting device, including 2.4G wireless earphone module, signal detection circuit, signal amplification circuit and voltage doubling rectifier circuit, signal detection circuit input is connected with 2.4G wireless earphone module audio output, and signal detection circuit output is connected with signal amplification circuit input, voltage doubling rectifier circuit input is connected with signal amplification circuit output, voltage doubling rectifier circuit output is connected with 2.4G wireless earphone module input. The utility model discloses can be according to the higher time of 2.4G wireless earphone loudspeaker volume acoustic pressure, automatically reduce earphone loudspeaker volume, provide the hearing protection of looks adaptation for the user.
Description
Technical Field
The utility model relates to an audio equipment technical field especially relates to a 2.4G wireless earphone acoustic pressure limiting device.
Background
In recent years, game equipment is continuously updated and changed, game contents are rich and colorful, short video and live broadcast industries are started, people who watch videos, listen music and play games and use earphones are more and more, the earphones become necessary products for life of people, and various noises are generated along with the development of industrial mechanization.
When there is a lot of noise interference around, in order to can hear the sound content in the earphone better, also can open earphone volume very big usually, listen to sound like this for a long time under great volume high sound pressure, can lead to ear eardrum damage and harm healthy phenomenon.
SUMMERY OF THE UTILITY MODEL
The utility model aims at solving and using under the long-time big sound volume high acoustic pressure condition of current earphone, probably leading to the ear eardrum damage, influence healthy problem, and the wireless earphone acoustic pressure limiting device of 2.4G who proposes.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
the utility model provides a 2.4G wireless earphone acoustic pressure limiting device, includes 2.4G wireless earphone module, signal detection circuit, signal amplification circuit and voltage doubling rectifier circuit, signal detection circuit input is connected with 2.4G wireless earphone module audio output, and signal detection circuit output is connected with signal amplification circuit input, voltage doubling rectifier circuit input is connected with signal amplification circuit output, and voltage doubling rectifier circuit output is connected with 2.4G wireless earphone module input.
Preferably, the left and right channel audio signals output by the 2.4G wireless earphone module are detected simultaneously.
Preferably, the signal amplifying circuit further amplifies the signal provided by the signal detecting circuit to improve the detection sensitivity.
Preferably, the voltage doubling rectifying circuit rectifies and filters the amplified audio signal into direct current voltage, doubles and superposes the direct current voltage together, and supplies the direct current voltage to the 2.4G wireless earphone module to perform loudspeaker volume and sound pressure limiting processing, so that the ears of a user are prevented from being damaged.
Compared with the prior art, the utility model provides a 2.4G wireless earphone acoustic pressure limiting device possesses following beneficial effect:
according to the 2.4G wireless earphone sound pressure limiting device, when the earphone is limited to reach the set or adjusted maximum volume value through the volume threshold value, the volume sound pressure output to the loudspeaker is automatically and dynamically adjusted to be within the safe range, so that the sound pressure limitation is realized, and the hearing is protected.
The part that does not relate to among the device all is the same with prior art or can adopt prior art to realize, the utility model discloses can select fixedly or set up the volume value and implement the acoustic pressure restriction protection according to different users' needs to the different user of adaptation uses, provides the hearing protection of looks adaptation for the user of difference.
Drawings
Fig. 1 is one of signal flow charts of a sound pressure limiting device for a 2.4G wireless earphone proposed by the present invention;
fig. 2 is a schematic diagram of a second principle of the sound pressure limiting device for a 2.4G wireless earphone according to the present invention.
In the figure: the earphone comprises a 2.4G wireless earphone module 11, a signal detection circuit 12, a signal amplification circuit 13 and a voltage-doubling rectifying circuit 14.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.
In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.
Referring to fig. 1-2, a 2.4G wireless earphone sound pressure limiting device includes a 2.4G wireless earphone module 11, a signal detection circuit 12, a signal amplification circuit 13 and a voltage doubling rectification circuit 14, and is characterized in that left and right channel audio output by the 2.4G wireless earphone module 11 is respectively connected with left and right channel signals of the signal detection circuit 12, an input end of the signal amplification circuit 13 is connected with an output end of the signal detection circuit 12, an input end of the voltage doubling rectification circuit 14 is connected with an output end of the signal amplification circuit 13, and an output end of the voltage doubling rectification circuit 14 is connected with a control signal input end of the 2.4G wireless earphone module 11.
The signal detection circuit is internally provided with a sound pressure limit value, and can be used for limiting and setting sound pressure values of different groups of people, such as 60 decibels of infants, 80 decibels of children, 95 decibels of adults and the like.
The utility model discloses in, the audio signal of 2.4G wireless earphone output, broadcast out sound signal with signal of telecommunication conversion by the speaker all the way, sound pressure limiting device signal detection circuitry is given on another way, amplify the back by signal amplification circuit, through voltage doubling rectifier circuit, convert the audio signal rectification filtering of alternation into double DC voltage, send back 2.4G wireless earphone module sense terminal, when the sound signal of exporting loudspeaker is great, when the sound pressure value is higher, automatically, turn down the audio signal of output, when the sound signal is less, automatically increase the audio signal of output again, reach dynamic adjustment, the sound pressure restriction purpose, can not produce the substantive influence to listening normal continuous sound.
The utility model discloses in, the theory of operation: the 2.4G wireless earphone module MK audio signal output terminals HPL, HPR respectively pass through the sampling coupling capacitors C1, C2, the isolation resistors R1, R2, the voltage dividing resistor R6, the coupling capacitor C3, the filter capacitor C5 filters high frequency interference signals, the audio signal is input from the base B of the Q1 triode and amplified, the audio signal is output by the collector C, the rectification of the positive and negative half-cycle audio signal is respectively completed by the coupling capacitor C6, the rectifier diodes D1, D2, and the audio signal is superimposed on the filter capacitor C7, the generated direct current voltage is 2 times of the audio signal voltage peak value, a higher direct current voltage is formed and is sent to the 2.4G wireless earphone module MK to determine the sound pressure so as to control the size of the audio signal output to the speaker, and achieve the purpose of sound pressure limitation. A power supply filter circuit is formed by a resistor R4 and a capacitor by MK power supply voltage of the 2.4G wireless earphone module, so that the voltage supplied to the signal amplification circuit can work more cleanly and stably, the resistor R5 is a load resistor of the amplification circuit formed by the triode Q1, the resistor R7 is a bias resistor of the triode Q1, the resistor R3 is a stable resistor of an emitter of the triode Q1, a certain temperature compensation effect is achieved, and the resistor R8 is a load resistor of the voltage-multiplying rectification circuit.
Above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the design of the present invention, equivalent replacement or change should be covered within the protection scope of the present invention.
Claims (4)
1. The utility model provides a 2.4G wireless earphone sound pressure limiting device, includes 2.4G wireless earphone module (11), signal detection circuit (12), signal amplification circuit (13) and voltage doubling rectifier circuit (14), its characterized in that, the audio frequency of the left and right sound channel of 2.4G wireless earphone module (11) output is connected with the left and right sound channel signal of signal detection circuit (12) respectively, signal amplification circuit (13) input is connected with signal detection circuit (12) output, the input of voltage doubling rectifier circuit (14) is connected with signal amplification circuit (13) output, and the output of voltage doubling rectifier circuit (14) is connected with 2.4G wireless earphone module (11) control signal input.
2. The sound pressure limiting device for a 2.4G wireless earphone according to claim 1, wherein the left and right channel audio signals output by the 2.4G wireless earphone module are detected simultaneously.
3. The sound pressure limiting device for a 2.4G wireless earphone according to claim 2, wherein the signal amplifying circuit further amplifies the signal provided by the signal detecting circuit to improve the detection sensitivity.
4. The sound pressure limiting device for the 2.4G wireless earphone according to claim 1, wherein the voltage doubling rectifying circuit rectifies and filters the amplified audio signal into direct current voltage, and doubles and superposes the direct current voltage on the direct current voltage, and the direct current voltage is supplied to the 2.4G wireless earphone module for loudspeaker volume sound pressure limiting processing, so that ears of a user are prevented from being damaged.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221445862.1U CN217363292U (en) | 2022-06-10 | 2022-06-10 | 2.4G wireless earphone sound pressure limiting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221445862.1U CN217363292U (en) | 2022-06-10 | 2022-06-10 | 2.4G wireless earphone sound pressure limiting device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217363292U true CN217363292U (en) | 2022-09-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221445862.1U Active CN217363292U (en) | 2022-06-10 | 2022-06-10 | 2.4G wireless earphone sound pressure limiting device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217363292U (en) |
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2022
- 2022-06-10 CN CN202221445862.1U patent/CN217363292U/en active Active
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