CN205793252U

CN205793252U - A kind of active noise reduction audio amplifier

Info

Publication number: CN205793252U
Application number: CN201620702483.4U
Authority: CN
Inventors: 于豪
Original assignee: Whaley Technology Co Ltd
Current assignee: Whaley Technology Co Ltd
Priority date: 2016-07-06
Filing date: 2016-07-06
Publication date: 2016-12-07
Anticipated expiration: 2026-07-06

Abstract

This utility model provides a kind of active noise reduction audio amplifier, including microphone module, DSP DAB controller, loudspeaker module, DSP DAB controller respectively with microphone module, loudspeaker module by wired or/and wireless mode is connected, DSP DAB controller has an audio signal input module, for obtaining the audio signal that playback equipment is play, DSP DAB controller receives the environmental audio signal collected by microphone module and sends the anti-phase environmental audio signal with environmental audio signal opposite in phase generated to loudspeaker module.The environmental audio signal gathered according to microphone module by DSP DAB controller is generated the anti-phase environmental audio signal with environmental audio signal opposite in phase and sends to loudspeaker module, thus realizes actively reducing environment noise and improve audio frequency and listen to effect.

Description

A kind of active noise reduction audio amplifier

Technical field

This utility model relates to technology for loudspeaker box field, particularly relates to a kind of active noise reduction audio amplifier.

Background technology

Television set or other have audio frequency play equipment operationally, its audio amplifier has in the case of environment quiet Good play sound effect effect, but when user uses television set or other have the equipment that audio frequency is play, many times Inevitably disturbed by environment noise, and this environment noise can be disturbed the audio frequency that audio amplifier plays out, make hearer glad Effect during reward audio frequency is greatly reduced, and reduces the experience of user's audition.

Utility model content

For defect and the technical problem of existence of above-mentioned prior art, what this utility model solved primarily technical problem is that A kind of audio amplifier actively reducing environment noise is provided, improves the experience of user's audition.

The technical scheme realizing above-mentioned purpose is:

A kind of active noise reduction audio amplifier of the present utility model, including microphone module, DSP DAB controller, speaker Module, described DSP DAB controller respectively with described microphone module, loudspeaker module by wired or/and wireless parties Formula connects, and described DSP DAB controller has an audio signal input module, for obtaining the audio frequency that playback equipment is play Signal, described DSP DAB controller receives the environmental audio signal collected by described microphone module and by generation Send to described loudspeaker module with the anti-phase environmental audio signal of environmental audio signal opposite in phase.

Described microphone signal processing module gathers the environmental audio signal that obtains of ambient sound and by environmental audio signal Being transferred to described microphone signal wireless transmitter module, described microphone signal wireless receiving module receives described microphone signal The environmental audio signal that wireless transmitter module is launched, and the environmental audio signal received is converted to the DAB signal of telecommunication.

Further improvement is that, described DSP DAB controller is integrated in described microphone module, described DSP number Radio connection is used between word Audio Controller and described loudspeaker module.

Further improvement is that, described DSP DAB controller is for being independently arranged, and described microphone module is with described Between DSP DAB controller, between described DSP DAB controller and described loudspeaker module, all use wireless connections Mode.

Further improvement is that, described DSP DAB controller is integrated in described loudspeaker module, described mike Radio connection is used between module and described DSP DAB controller.

Further improvement is that, also include that audio power amplification module, described audio power amplification module are arranged at described Between loudspeaker module and described DSP DAB controller, described audio power amplification module is used for amplifying DSP DAB The described anti-phase environmental audio signal that controller generates.

Further improvement is that, described microphone module quantity is one or more.

This utility model is owing to have employed above technical scheme so that it is have the advantages that

By using DSP DAB controller to be connected with microphone module, loudspeaker module respectively, DSP DAB The environmental audio signal that controller is gathered according to microphone module generates the anti-phase environment with environmental audio signal opposite in phase Audio signal also sends to loudspeaker module, thus realizes actively reducing environment noise and improve audio frequency and listen to effect；Raise described Between the outfan of sound device module and described DSP DAB controller, audio power amplification module is set, by adjusting circuit Amplification, can adjust accurately the anti-phase environmental audio signal size after the DSP anti-phase process of DAB controller with Environmental audio signal is in the same size, thus realizes accurately offsetting environmental noise, improves the audio frequency effect of audio amplifier, has cost simultaneously Cheap advantage.

Accompanying drawing explanation

Fig. 1 is the circuit theory schematic diagram of this utility model a kind of active noise reduction audio amplifier；

In figure, 1-microphone module, 11-microphone signal processing module, 12-microphone signal wireless transmitter module, 2- DSP DAB controller, 20-microphone signal wireless receiving module, 21-DSP Digital audio process module, 22-audio frequency is believed Number input module, 3-loudspeaker module, 4-audio power amplification module.

Detailed description of the invention

Below in conjunction with the accompanying drawing in this utility model embodiment, the technical scheme in this utility model embodiment is carried out Clearly and completely describe, it is clear that described embodiment is only a part of embodiment of this utility model rather than whole Embodiment.Based on the embodiment in this utility model, those of ordinary skill in the art are not under making creative work premise The every other embodiment obtained, broadly falls into the scope of this utility model protection.

Embodiment one

As it is shown in figure 1, the utility model discloses a kind of active noise reduction audio amplifier, including one or more microphone modules 1, DSP DAB controller 2, loudspeaker module 3, DSP DAB controller 2 respectively with microphone module 1, loudspeaker module 3 connect, and DSP DAB controller 2 receives the environmental audio signal collected by microphone module 1 and by that generate and environment The anti-phase environmental audio signal that audio signal phase is contrary sends to loudspeaker module 3；DSP DAB controller 2 has one Audio signal input module 22, for obtaining the audio signal that playback equipment is play, wherein, DSP DAB controller 2 basis The audio signal that playback equipment acquired in audio signal input module 22 is play, as reference signal, will be adopted by microphone module 1 Collect to the audio signal play with playback equipment of environmental audio signal make comparisons, the environment gathered due to microphone module 1 In audio signal, a part of signal is consistent with the audio signal that playback equipment is play, so DSP DAB controller 2 is not The environmental audio signal consistent with the audio signal that playback equipment is play is done noise token process, but handle is broadcast with playback equipment The inconsistent environmental audio signal of the audio signal put is done noise token and is processed and anti-phase process the ring generating with being labeled as noise The anti-phase environmental audio signal that border audio signal phase is contrary, and anti-phase environmental audio signal is sent to loudspeaker module 3.

DSP DAB controller 2 for being independently arranged, DSP DAB controller 2 and microphone module 1, speaker mould Block 3 can wirelessly or wired mode connects, in the present embodiment, DSP DAB controller 2 and microphone module 1 it Between use wireless mode connect, microphone module 1 includes microphone signal processing module 11, microphone signal wireless transmitter module 12, microphone signal wireless transmitter module 12 connects with the microphone signal wireless receiving module 20 of DSP DAB controller 2 Connecing, microphone signal processing module 11 gathers environmental audio signal that ambient sound obtains and environmental audio signal is transferred to wheat Gram wind wireless transmitter module 12, microphone signal wireless receiving module 20 receives microphone signal wireless transmitter module 12 The environmental audio signal penetrated, and the environmental audio signal received is converted to the DAB signal of telecommunication.

Optimal way of the present utility model is, in this detailed description of the invention, active noise reduction audio amplifier also includes that audio power is put Big module 4, audio power amplification module 4 is arranged between the outfan of loudspeaker module 3 and DSP DAB controller 2, logical Cross audio power amplification module 4 the described anti-phase environmental audio signal that DSP DAB controller 2 generates to be amplified to and labelling For the environmental audio signal size of noise identical after, retransmit to loudspeaker module 3, environmental noise can be offset accurately, improve The audio frequency effect of audio amplifier.

Embodiment two

This utility model provides the active noise reduction audio amplifier of another kind of embodiment, is with embodiment one difference, this In embodiment, DSP DAB controller 2 is integrated in microphone module 1, DSP DAB controller 2 and loudspeaker module Radio connection is used between 3.

Embodiment three

This utility model provides the active noise reduction audio amplifier of the third embodiment, is with embodiment one difference, this In embodiment, DSP DAB controller 2 is integrated in loudspeaker module 3, microphone module 1 and DSP DAB controller Radio connection is used between 2.

The operation principle of this active noise reduction audio amplifier is as follows: at outdoor placement microphone module 1, and quantity is typically at 2-24 Between, when opening active noise reduction function, microphone signal processing module 11 receives the environment noise that surrounding transmits, by environment Noise is converted to environmental audio signal and is launched to microphone signal wireless receiving by microphone signal wireless transmitter module 12 Module 20, microphone signal wireless receiving module 20 receives environmental audio signal and passes to DSP Digital audio process module 21, DSP Digital audio process module 21 are by broadcasting of obtaining in the environmental audio signal received and audio signal input module 22 The audio signal putting device plays is made comparisons, and decodes the environmental audio signal being labeled as noise, and will be labeled as the ring of noise Border audio signal is converted to the DAB signal of telecommunication, and through anti-phase process, generation is anti-phase with environmental audio signal opposite in phase Environmental audio signal, described anti-phase environmental audio DSP DAB controller 2 generated by audio power amplification module 4 Signal be amplified to identical with the environmental audio signal size being labeled as noise after, retransmit to loudspeaker module 3, due to anti-phase ring Border audio signal is identical with the opposite in phase of the environmental audio signal being labeled as noise, size after amplifying, and effectively counteracts ring Border noise, it is achieved thereby that the function of active noise reduction.

Should be appreciated that the regular job custom of the noun of locality be all binding operation person and user and Figure of description and set Standing, their appearance should not affect protection domain of the present utility model.

Being described in detail this utility model above in association with accompanying drawing embodiment, those skilled in the art can root According to described above, this utility model made many variations example.Thus, some details in embodiment should not be constituted this practicality Novel restriction, this utility model by the scope that defines using appended claims as protection domain of the present utility model.

Claims

1. an active noise reduction audio amplifier, it is characterised in that include microphone module, DSP DAB controller, speaker mould Block, described DSP DAB controller respectively with described microphone module, loudspeaker module by wired or/and wireless mode Connecting, described DSP DAB controller has an audio signal input module, for obtaining the audio frequency letter that playback equipment is play Number, described DSP DAB controller receive the environmental audio signal that collected by described microphone module and by generate with The anti-phase environmental audio signal of environmental audio signal opposite in phase sends to described loudspeaker module.

Active noise reduction audio amplifier the most according to claim 1, it is characterised in that described DSP DAB controller is integrated in In described microphone module, between described DSP DAB controller and described loudspeaker module, use radio connection.

Active noise reduction audio amplifier the most according to claim 1, it is characterised in that described DSP DAB controller is independent Arranging, between described microphone module and described DSP DAB controller, described DSP DAB controller raises with described Radio connection is all used between sound device module.

Active noise reduction audio amplifier the most according to claim 1, it is characterised in that described DSP DAB controller is integrated in In described loudspeaker module, between described microphone module and described DSP DAB controller, use radio connection.

Active noise reduction audio amplifier the most according to any one of claim 1 to 4, it is characterised in that also include that audio power is put Big module, described audio power amplification module is arranged between described loudspeaker module and described DSP DAB controller, institute State audio power amplification module for amplifying the described anti-phase environmental audio signal that DSP DAB controller generates.

Active noise reduction audio amplifier the most according to any one of claim 1 to 4, it is characterised in that described microphone module number Amount is one or more.