CN211578367U - Noise reduction device based on multiple sound emitting units - Google Patents
Noise reduction device based on multiple sound emitting units Download PDFInfo
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- CN211578367U CN211578367U CN202020066069.5U CN202020066069U CN211578367U CN 211578367 U CN211578367 U CN 211578367U CN 202020066069 U CN202020066069 U CN 202020066069U CN 211578367 U CN211578367 U CN 211578367U
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Abstract
The utility model discloses a noise reduction device based on multiple sound generating units, which comprises an audio processing chip, a power supply, a microphone and at least a first sound generating unit and a second sound generating unit; the audio processing chip is respectively electrically connected with the power supply, the microphone, the first sound generating unit and the second sound generating unit, the power supply supplies power to the audio processing chip, the microphone collects environmental noise, and the first sound generating unit and the second sound generating unit perform electro-acoustic conversion to generate sound; the audio processing chip receives an environmental noise signal collected by the microphone and outputs reverse noise for offsetting the environmental noise through the first sound production unit; the audio processing chip also receives the input of an audio signal to be played and outputs the audio signal through the second sound production unit. The utility model discloses make and fall the device of making an uproar can not lose audio signal's details when making an uproar, guarantee the quality of audio frequency.
Description
Technical Field
The utility model relates to an acoustics falls technical field of making an uproar, especially relates to a device of making an uproar falls based on many sound units.
Background
The acoustic principle of the noise reduction technology is to cancel noise by reversing noise sound waves by the principle of phase-opposition cancellation of sound waves.
The existing noise reduction technology is mostly applied to noise reduction of earphones and automobiles, and specifically comprises the following steps: external noise passes through the earphone/car, at first can be isolated by physics and fall a part of noise, this part we call passively fall and make an uproar, also can be caught by the microphone simultaneously and convert into the signal of telecommunication, the signal of telecommunication passes through the processing of DSP chip, converts into the signal of telecommunication of antiphase and forms reverse noise signal, later can play through loudspeaker with audio signal (music, broadcasting, phone voice etc.), wherein reverse noise signal can cancel each other with the residual noise after falling passively and make an uproar, only leaves pure audio signal at last.
However, the existing noise reduction technology has the defect that reverse noise and audio frequency are emitted from the same generating unit (loudspeaker), so that a part of original noise reduction sound wave and a signal in the audio frequency are mutually cancelled, rather than canceling the noise signal, so that details of the audio signal are lost when people hear the audio signal. Moreover, the whole frequency response curve of the noise reduction loudspeaker needs to be adjusted to be flat, so that the noise signal can be accurately restored, but the audio signal is too common, sound expression of different frequency bands cannot be strengthened or weakened according to the preference of a tuner, and the music performance is lacked.
Therefore, the prior art has yet to be improved.
SUMMERY OF THE UTILITY MODEL
In view of the foregoing prior art's weak point, the utility model aims to provide a device of making an uproar falls based on multiple sound generating unit aims at making the device of making an uproar fall and can not lose audio signal's details when making an uproar, guarantees the quality of audio frequency.
In order to achieve the purpose, the utility model adopts the following technical proposal:
a noise reduction device based on a multiple sound generating unit comprises an audio processing chip, a power supply, a microphone and at least a first sound generating unit and a second sound generating unit;
the audio processing chip is respectively electrically connected with the power supply, the microphone, the first sound generating unit and the second sound generating unit, the power supply supplies power to the audio processing chip, the microphone collects environmental noise, and the first sound generating unit and the second sound generating unit perform electro-acoustic conversion to generate sound;
the audio processing chip receives an environmental noise signal collected by the microphone and outputs reverse noise for offsetting the environmental noise through the first sound production unit;
the audio processing chip also receives the input of an audio signal to be played and outputs the audio signal through the second sound production unit.
The audio processing chip is a Bluetooth audio processing chip integrated with a Bluetooth function, and receives the input of audio signals in a Bluetooth mode in a wireless mode.
The Bluetooth audio processing chip is BES2300 in model.
The power supply comprises a lithium battery, a battery management circuit, a charging interface and a voltage stabilizing circuit, the battery management circuit is electrically connected with the lithium battery, the charging interface and the voltage stabilizing circuit, the voltage stabilizing circuit and the battery management circuit are electrically connected with the audio processing chip, an external power supply is input into the battery management circuit from the charging interface and then input into the lithium battery for charging, and the lithium battery is output to the voltage stabilizing circuit through the battery management circuit and then supplies power to the audio processing chip.
The battery management circuit comprises a front end protection chip electrically connected with a charging interface, a charge and discharge management chip electrically connected with the front end protection chip and a lithium battery, and a battery protection chip electrically connected with the lithium battery, wherein the model of the front end protection chip is HP2601D8, the model of the charge and discharge management chip is HP4059D6, and the model of the battery protection chip is XB6091 ISC.
The two microphones comprise a receiving microphone and an active noise reduction microphone which are electrically connected with the audio processing chip.
Wherein the first sound-emitting unit is a moving coil unit or a moving iron unit;
the second sound generating unit is a moving coil unit or a moving iron unit.
The utility model discloses a device of making an uproar falls based on multiple sound unit, through setting up two at least sound generating unit, reverse noise and the audio frequency of treating the broadcast are followed two independent sound generating unit outputs respectively, and the reverse noise that is used for eliminating the environmental noise that the chip generated is handled to the audio frequency like this can not interfere with the audio frequency production of treating the broadcast, can not lead to the damage of audio signal detail to obtain pure audio frequency, guaranteed the quality of audio frequency. Simultaneously because reverse noise and the audio frequency of treating the broadcast independently export, then the user can adjust sound producing unit's frequency response curve according to oneself hobby, if strengthen or weaken the sound performance of different frequency channels, and strengthen the utility model discloses the music nature of device of making an uproar is fallen in the broadcast audio frequency in-process improves and uses experience.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
Fig. 1is a schematic view of the principle of the noise reducer based on multiple sound generating units according to the first embodiment of the present invention;
fig. 2 is a schematic circuit connection diagram of the audio processing chip in the noise reduction apparatus of the present invention;
fig. 3 is a schematic circuit connection diagram of a first sound emitting unit in the noise reduction apparatus of the present invention;
fig. 4 is a schematic circuit connection diagram of a second sound generating unit in the noise reducing device of the present invention;
fig. 5 is a schematic diagram illustrating a principle of a power supply in the noise reduction apparatus of the present invention;
fig. 6 is a schematic diagram of a circuit connection of a power supply in the noise reduction apparatus of the present invention;
fig. 7 is a schematic diagram of the circuit connection of the microphone in the noise reduction device of the present invention.
Description of reference numerals:
100-a noise reduction device, 10-an audio processing chip, 20-a power supply, 21-a lithium battery, 22-a battery management circuit, 221-a front-end protection chip, 222-a charge and discharge management chip, 223-a battery protection chip, 23-a charging interface, 24-a voltage stabilizing circuit, 30-a microphone, 40-a first sound generating unit and 50-a second sound generating unit.
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. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
It should be noted that all the directional indicators (such as upper, lower, left, right, front and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicator is changed accordingly.
In the present application, unless expressly stated or limited otherwise, the terms "connected" and "fixed" are to be construed broadly, e.g., "connected" may be a fixed connection or a removable connection, or may be integral therewith; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
In addition, descriptions in the present application as to "first", "second", and the like are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit to the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature.
Referring to fig. 1 and fig. 2, the present invention provides a noise reduction apparatus 100 based on multiple sound emitting units, which includes an audio processing chip 10, a power source 20, a microphone 30, and at least a first sound emitting unit 40 and a second sound emitting unit 50. The utility model discloses a device of making an uproar 100 falls can be earphone and electronic equipment such as car that have the function of making an uproar of falling.
The audio processing chip 10 is electrically connected to the power supply 20, the microphone 30, the first sound generating unit 40, and the second sound generating unit 50, respectively, the power supply 20 supplies power to the audio processing chip 10, the microphone 30 collects environmental noise, and the first sound generating unit 40 and the second sound generating unit 40 perform electro-acoustic conversion to generate sound.
The audio processing chip 10 receives the ambient noise signal collected by the microphone 30, and outputs the reverse noise for canceling the ambient noise through the first sound generating unit 40. The microphone 30 captures the environmental noise and converts the environmental noise into an electrical signal, the electrical signal is processed by the audio processing chip 10 and converted into an electrical signal with an opposite phase to form an opposite noise, and then the opposite noise is played and output through the first sound generating unit 40, and the opposite noise is abutted to the environmental noise after passive noise reduction, so that a noise reduction effect is achieved.
And simultaneously, the utility model discloses the audio frequency of noise reduction device 100 handles chip 10 and still receives the audio signal's of treating the broadcast input and exports through second sound production unit 50. The normal audio signal that waits to broadcast is input to audio frequency processing chip 10 back and is broadcast the output through second sound generating unit 50, because of it adopts respective sound generating unit to export respectively with reverse noise, the reverse noise that is used for eliminating the ambient noise that the event audio frequency processing chip 10 generated can not interfere with the audio frequency that waits to broadcast in the event audio frequency processing chip 10, thereby can not lead to the damage of audio signal detail, noise reduction device 100 finally can output pure audio frequency, thereby the good quality of original input audio frequency has been guaranteed. Simultaneously because reverse noise and the audio frequency of treating the broadcast adopt independent sound generating unit output respectively, adopt a sound generating unit simultaneous output reverse noise and treat the audio frequency of broadcast relatively with prior art and lead to the frequency response curve that can not adjust audio frequency broadcast alone, the utility model discloses the user of device 100 of making an uproar falls can adjust the frequency response curve of second sound generating unit 50 according to the hobby of oneself completely, and can not produce the interference with the frequency response curve of first sound generating unit 40, like this, has improved the utility model discloses the musical performance and the use of device 100 of making an uproar fall experience.
Preferably, the first sound emitting unit 40 of the present invention is a moving coil unit or a moving iron unit; and simultaneously, the utility model discloses a second sound generating unit 50 is moving coil unit or moving iron unit. That is, the first sounding unit 40 and the second sounding unit 50 of the present invention can be configured as a moving coil unit or a moving iron unit or a combination of both units at the same time to satisfy different sound quality requirements.
The utility model discloses an audio frequency processing chip 10 adopts DSP digital processing chip, converts the analog signal of the ambient noise that microphone 30 gathered to digital signal to the reverse noise of conversion phase place.
Preferably, the utility model discloses an audio frequency processing chip 10 is the bluetooth audio frequency processing chip that has the bluetooth function of integration, through bluetooth mode wireless reception audio signal's input. The audio frequency of waiting to broadcast like this can spread into through the mode of bluetooth the utility model discloses a device 100 of making an uproar falls, and very conveniently popularizes and applies to bluetooth headset on.
As shown in fig. 2, fig. 3, and fig. 4, in the embodiment of the present invention, the bluetooth audio processing chip (U1) has a model number BES 2300.
The BES2300 chip supports Bluetooth 5.0, LBRT low-frequency forwarding technology and dual-mode Bluetooth 5.0, and also supports the third-generation FWS full wireless stereo technology, dual microphones and the like, and is packaged by 28nm and BGA. The high-end active noise reduction earphone can realize high tone quality and active noise reduction by using a full integrated chip by supporting a noise reduction technology, particularly a high-performance self-adaptive active noise reduction technology.
As shown in fig. 3 and 4, in the embodiment of the present invention, the pins LOUT _ LP and LOUT _ LN of the BES2300 chip are connected to the LOUT _ LP and LOUT _ LN input terminals of the first sound generating unit 40(SPK1), the pins LOUT _ RP and LOUT _ RN of the BES2300 chip are connected to the LOUT _ RP and LOUT _ RN input terminals of the second sound generating unit 50(SPK 2).
As shown in fig. 5 to 7, the utility model discloses a power 20 includes lithium cell 21, battery management circuit 22, interface 23 and voltage stabilizing circuit 24 charge, battery management circuit 22 and lithium cell 21, interface 23 and the 24 electricity of voltage stabilizing circuit charge are connected, voltage stabilizing circuit 24 and battery management circuit 22 are connected with audio frequency processing chip 10 electricity, external power source inputs to battery management circuit 22 from interface 23 that charges, then input to lithium cell 21 and charge, lithium cell 21 exports to voltage stabilizing circuit 24 through battery management circuit 22 and then supplies power to audio frequency processing chip 10. The battery management circuit 22 manages and protects the charging and discharging of the lithium battery 21, and the voltage stabilizing circuit 24 provides a stable voltage for the audio processing chip 10 to ensure the normal operation of the entire noise reduction device 100. In the embodiment of the present invention, the voltage stabilizing circuit 24 is provided with the voltage stabilizing chip U2 and U3, the U2 model is RS3236, the U3 model is AS1510, the OUT pin of U3 is connected with HALL-OUT/PIO [07] of the BES2300 chip to provide power.
Further, as shown in fig. 6, the utility model discloses a battery management circuit 22 includes front end protection chip 221(U6) with the interface 23 electricity that charges is connected, with the charge and discharge management chip 222(U7) that front end protection chip 221(U6) and lithium cell 21 electricity are connected, battery protection chip 223(U5) with the lithium cell 21 electricity is connected, front end protection chip U6 model is HP2601D8, charge and discharge management chip U7 model is HP4059D6, battery protection chip U5 model is XB6091 ISC. The front-end protection chip U6 performs current-limiting protection, the charge and discharge management chip U7 controls the charge and discharge of the lithium battery 21, and the battery protection chip U5 performs overcharge, overdischarge, overcurrent, overheat and short-circuit protection on the lithium battery 21. Thus, the utility model discloses lithium battery 21 in noise reduction device 100 obtains good protection, improves the life of product.
Preferably, as shown in fig. 7, the two microphones 30 of the noise reduction apparatus 100 of the present invention are provided, including a receiving microphone 31(Talk MIC) and an active noise reduction microphone 32(ANC MIC) electrically connected to the audio processing chip 10. The receiving microphone 31 is used for collecting conventional voice, and the active noise reduction microphone 32 is specially used for actively monitoring environmental noise and timely feeding back to the audio processing chip 10 for noise reduction processing, so that the noise reduction effect is improved.
The embodiment of the utility model provides a device of making an uproar 100 falls based on multiple sound generating unit through setting up two at least sound generating unit, reverse noise and normal audio frequency of waiting to broadcast are followed two independent sound generating unit outputs respectively, and the reverse noise that is used for eliminating environmental noise that the chip 10 generated is handled to the audio frequency like this can not interfere with the audio frequency production of waiting to broadcast, can not lead to the damage of audio signal detail to the quality of audio frequency has been guaranteed. Simultaneously because reverse noise and the audio frequency of treating the broadcast independently export, then the user can adjust sound producing unit's frequency response curve according to oneself hobby, if strengthen or weaken the sound performance of different frequency channels, and strengthen the utility model discloses the music nature of device of making an uproar is fallen in the broadcast audio frequency in-process has improved user's use and has experienced.
The above only be the preferred embodiment of the utility model discloses a not consequently restriction the utility model discloses a patent range, all are in the utility model discloses a conceive, utilize the equivalent structure transform of what the content was done in the description and the attached drawing, or direct/indirect application all is included in other relevant technical field the utility model discloses a patent protection within range.
Claims (7)
1. A noise reduction device based on a multi-sound-generating unit is characterized by comprising an audio processing chip, a power supply, a microphone and at least a first sound-generating unit and a second sound-generating unit;
the audio processing chip is respectively electrically connected with the power supply, the microphone, the first sound generating unit and the second sound generating unit, the power supply supplies power to the audio processing chip, the microphone collects environmental noise, and the first sound generating unit and the second sound generating unit perform electro-acoustic conversion to generate sound;
the audio processing chip receives an environmental noise signal collected by the microphone and outputs reverse noise for offsetting the environmental noise through the first sound production unit;
the audio processing chip also receives the input of an audio signal to be played and outputs the audio signal through the second sound production unit.
2. The apparatus of claim 1, wherein the audio processing chip is a bluetooth audio processing chip integrated with bluetooth function, and the audio processing chip wirelessly receives an input of an audio signal via bluetooth.
3. The multi-sound-generating-unit-based noise reduction apparatus according to claim 2, wherein the bluetooth audio processing chip is under the model number BES 2300.
4. The multiple sound unit based noise reduction device of claim 3, wherein the power supply comprises a lithium battery, a battery management circuit, a charging interface and a voltage stabilizing circuit, the battery management circuit is electrically connected with the lithium battery, the charging interface and the voltage stabilizing circuit, the voltage stabilizing circuit and the battery management circuit are electrically connected with the audio processing chip, an external power supply is input into the battery management circuit from the charging interface and then input into the lithium battery for charging, and the lithium battery is output to the voltage stabilizing circuit through the battery management circuit and then supplies power to the audio processing chip.
5. The multiple sound unit based noise reduction apparatus of claim 4, wherein the battery management circuit comprises a front end protection chip electrically connected to the charging interface, a charging and discharging management chip electrically connected to the front end protection chip and the lithium battery, and a battery protection chip electrically connected to the lithium battery, wherein the front end protection chip is HP2601D8, the charging and discharging management chip is HP4059D6, and the battery protection chip is XB6091 ISC.
6. The multiple sound unit based noise reduction apparatus of claim 1, wherein the microphones are provided in two, including a receiving microphone and an active noise reduction microphone electrically connected to the audio processing chip.
7. The multiple sound unit based noise reduction apparatus according to claim 1,
the first sound-emitting unit is a moving coil unit or a moving iron unit;
the second sound generating unit is a moving coil unit or a moving iron unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202020066069.5U CN211578367U (en) | 2020-01-10 | 2020-01-10 | Noise reduction device based on multiple sound emitting units |
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| CN202020066069.5U CN211578367U (en) | 2020-01-10 | 2020-01-10 | Noise reduction device based on multiple sound emitting units |
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| CN211578367U true CN211578367U (en) | 2020-09-25 |
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Address after: 518000 1308-1309, block B, Huihai Plaza, Chuangye Road, Longhua street, Longhua District, Shenzhen City, Guangdong Province Patentee after: Shenzhen xingkeqi Innovation Technology Co.,Ltd. Address before: 518000 1308-1309, block B, Huihai Plaza, Chuangye Road, Longhua street, Longhua District, Shenzhen City, Guangdong Province Patentee before: SHENZHEN GINTO E-COMMERCE Co.,Ltd. |
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