CN207884835U - A kind of noise cancelling headphone based on Lightning interfaces - Google Patents

Abstract

The utility model discloses a kind of noise cancelling headphones based on Lightning interfaces, including signal receiving module, noise reduction module, the first microphone, second microphone and loudspeaker, signal receiving module is electrically connected with second microphone, signal de-noising module is also electrically connected with the first microphone, second microphone, loudspeaker respectively, and the first microphone is also electrically connected with second microphone；First microphone acquires background noise and call voice signal, antiphase signal is generated after signal de-noising resume module, antiphase signal is mixed with the call voice signal that second microphone acquires, eliminates background noise, and voice transfer to the loudspeaker after elimination background noise are played out.The utility model can be used family in the case where background noise is larger, also can clearly converse with other side, improve the convenience and confidentiality of call, improve the communication experiences of caller.

Description

A kind of noise cancelling headphone based on Lightning interfaces

Technical field

The utility model is related to ear phone technology field more particularly to a kind of noise cancelling headphones based on Lightning interfaces.

Background technology

Currently, existing mobile phone mainly uses 3.5mm earpiece holes interfaces, audio input output is all analog signal, sound quality It is poor.The function of smart mobile phone is more and more, and the space for causing it internal is more and more crowded, cancels conventional 3.5mm earphones and inserts Hole has been smart mobile phone development inevitable choice.It uses the mobile phone of Lightning interfaces more and more on the market at present, uses The earphone of Lightning interfaces has certain occupancy volume on the market.

The maximum feature of digital earphone based on Lightning interfaces is exactly audio signal unlike conventional analog signal earphone Equally, the quasi- signal conversion of digital revolving die is done in mobile phone, audio player, but by all digital data transmissions in mobile phone To earphone, ensures that mobile phone output is identical with the digital signal of earphone input, reduce sound quality loss to the full extent.

Currently based on the earphone of Lightning interfaces all without decrease of noise functions, in use, noise under the big environment of noise Source can hank influence to the quality of call, so that both call sides is not heard dialog context, even cannot smoothly converse, be User brings inconvenience using the earphone based on Lightning interfaces.

Therefore, the existing technology needs to be improved and developed.

Utility model content

In view of above-mentioned deficiencies of the prior art, the purpose of this utility model is to provide one kind being based on Lightning interfaces Noise cancelling headphone, it is intended to solve the problems, such as that the earphone in the prior art based on Lightning interfaces does not all have decrease of noise functions.

The technical solution of the utility model is as follows：

A kind of noise cancelling headphone based on Lightning interfaces, including signal receiving module, signal de-noising module, the first wheat Gram wind, second microphone and loudspeaker, the signal receiving module are electrically connected with the second microphone, the signal de-noising module It is also electrically connected respectively with first microphone, the second microphone, the loudspeaker, first microphone is also with described Two microphones are electrically connected；

The first microphone acquisition background noise and call voice signal, reverse phase is generated after signal de-noising resume module Position signal, antiphase signal is mixed with the call voice signal that second microphone acquires, and eliminates background noise, and will disappear Except the voice transfer after background noise to the loudspeaker plays out.

Preferably, the signal receiving module includes being connected for the Lightning interfaces with electronic equipment Lightning interfacing units, and Lightning audio units that audio for Lightning interfaces is handled, institute It states Lightning interfacing units to connect with the Lightning audio units, the Lightning audio units and institute State second microphone connection.

Preferably, the noise cancelling headphone further includes 3.5mm interface modules, the call for acquiring the second microphone Transmitting voice signal is to being provided on the electronic equipment of 3.5mm interfaces.

Preferably, the signal de-noising module includes filter unit, amplifying unit, control unit, adder and biased electrical Unit, the filter unit is pressed to be electrically connected with the amplifying unit, the adder is electrically connected with the amplifying unit, the control Unit processed is electrically connected with the filter unit, amplifying unit, adder and bias voltage units respectively.

Preferably, first microphone is two omni-directional microphones.

Preferably, the filter unit includes 2 filters.

Preferably, the noise cancelling headphone further includes the memory module for storing communicating data, the memory module and institute State second microphone electrical connection.

Advantageous effect：The utility model provides a kind of noise cancelling headphone based on Lightning interfaces, and family can be used to carry on the back In the case that scape noise is larger, it also can clearly converse with other side, improve the convenience and confidentiality of call, improve call The communication experiences of person.

Description of the drawings

Below in conjunction with accompanying drawings and embodiments, the utility model is described in further detail, in attached drawing：

Fig. 1 is the schematic diagram of noise cancelling headphone preferred embodiment of the utility model based on Lightning interfaces；

Specific implementation mode

The utility model provides one kind, to keep the purpose of this utility model, technical solution and effect clearer, clear, The utility model is further described below.It should be appreciated that specific embodiment described herein is only used to explain this Utility model is not used to limit the utility model.

Referring to Fig. 1, as shown in Figure 1, the noise cancelling headphone 100 based on Lightning interfaces include signal receiving module 11, Signal de-noising module 13, the first microphone 14, second microphone 12 and loudspeaker 15, signal receiving module 11 and second microphone 14 Electrical connection, signal de-noising module 13 are also electrically connected with the first microphone 14, second microphone 12, loudspeaker 15 respectively, the first Mike Wind 14 is also electrically connected with second microphone 12；

First microphone 14 acquires background noise and call voice signal, and reverse phase is generated after the processing of signal de-noising module 13 Position signal, antiphase signal is mixed with the call voice signal that second microphone 12 acquires, and eliminates background noise, and will Voice transfer to the loudspeaker 15 after background noise are eliminated to play out.When it is implemented, collecting background using the first microphone 14 Noise and other side are transmitted through the call sound come, after the processing of 13 Digital Signal Processing of signal de-noising module, generate the signal of antiphase, And mix up with second microphone 12, to eliminate the background sound of environment, removal noise reaches 40dB.User is any noisy In the environment of, such as street corner bustling with vehicles, exhibition scene, even Pub, KTV remain to pass to other side clearly without the communication sound made an uproar Matter, need not repetition of explanation or amplification volume always, or even a quietly place call is in addition looked for, also there is no concern that sometimes The place where allowing other side to know oneself is not wanted, the call convenience that improves, confidentiality, and then improve the call body of user It tests.

Preferably, signal receiving module 11 includes the Lightning being connected for the Lightning interfaces with electronic equipment Interfacing unit 111, and Lightning audio units 112 that audio for Lightning interfaces is handled, Lightning interfacing units 111 are connect with Lightning audio units 112, Lightning audio units 112 and second Microphone 14 connects.Specifically, electronic equipment be with Lightning interfaces the equipment that can be conversed, including it is but unlimited In iphone series mobile phone and ipad.For example, by taking iphone7 as an example, Lightning interface modules 111 are connect with iphone7, Obtain call voice signal, the audio conversion that Lightning audio units then are used to receive Lightning interfacing units It is changed to universal audio.

Preferably, noise cancelling headphone further includes 3.5mm interface modules 16, the call voice for acquiring second microphone 12 Signal transmission is to being provided on the electronic equipment of 3.5mm interfaces.Then at this time can be connected to the voice that noise cancelling headphone obtains has The electronic equipment of 3.5mm interfaces plays out.

Preferably, signal de-noising module 13 includes filter unit, amplifying unit, control unit, adder and bias voltage Unit, filter unit are electrically connected with amplifying unit, and adder is electrically connected with amplifying unit, control unit respectively with filter unit, Amplifying unit, adder and bias voltage units electrical connection.Specifically, the background that filter unit is used to acquire the first microphone Noise and call voice signal are filtered, remove noise, and by remove noise after background noise and call voice signal into Row amplification, and after carrying out antiphase processing, the call voice signal of second microphone acquisition is obtained, by the background noise after reverse phase And after call voice signal is overlapped with call voice signal, the background noise of reverse phase is obtained, by the background noise after reverse phase After background noise and call voice Signal averaging, noiseless call voice signal is obtained, and by noiseless call voice Signal transmission is answered to loudspeaker for user.Filter unit includes at least two filter.Preferably, 2 filters are selected, respectively The voice signal acquired to the first microphone and second microphone is filtered.

Preferably, the first microphone 14 is two omni-directional microphones.Omni-directional microphone pickup radius is very big, one meter two Three meters of five meters have of rice.The sensitivity of omnidirectional microphone is all very high, and background noise and call voice signal are obtained to facilitate.

Preferably, noise cancelling headphone further includes the memory module 17 for storing communicating data, memory module 17 and the second wheat Gram wind 12 is electrically connected.Communicating data is stored by memory module 17, can be that user preserves message registration in time.

It should be understood that the application of the utility model is not limited to above-mentioned citing, those of ordinary skill in the art are come It says, it can be modified or changed according to the above description, and all these modifications and variations should all belong to the appended power of the utility model The protection domain that profit requires.

Claims (7)

1. a kind of noise cancelling headphone based on Lightning interfaces, which is characterized in that including signal receiving module, signal de-noising mould Block, the first microphone, second microphone and loudspeaker, the signal receiving module are electrically connected with the second microphone, the letter Number noise reduction module is also electrically connected with first microphone, the second microphone, the loudspeaker respectively, first microphone Also it is electrically connected with the second microphone；

The first microphone acquisition background noise and call voice signal, generate antiphase letter after signal de-noising resume module Number, antiphase signal is mixed with the call voice signal that second microphone acquires, eliminates background noise, and carry on the back eliminating Voice transfer to the loudspeaker after scape noise play out.

2. the noise cancelling headphone according to claim 1 based on Lightning interfaces, which is characterized in that the signal receives Module includes the Lightning interfacing units being connected for the Lightning interfaces with electronic equipment, and is used for The Lightning audio units that the audio of Lightning interfaces is handled, the Lightning interfacing units and institute The connection of Lightning audio units is stated, the Lightning audio units are connect with the second microphone.

3. the noise cancelling headphone according to claim 2 based on Lightning interfaces, which is characterized in that the noise cancelling headphone Further include 3.5mm interface modules, the call voice signal transmission for acquiring the second microphone connects to 3.5mm is provided with On the electronic equipment of mouth.

4. the noise cancelling headphone according to claim 3 based on Lightning interfaces, which is characterized in that the signal de-noising Module includes filter unit, amplifying unit, control unit, adder and bias voltage units, and the filter unit is put with described Big unit is electrically connected, and the adder is electrically connected with the amplifying unit, described control unit respectively with the filter unit, put Big unit, adder and bias voltage units electrical connection.

5. the noise cancelling headphone according to claim 4 based on Lightning interfaces, which is characterized in that first Mike Wind is two omni-directional microphones.

6. the noise cancelling headphone according to claim 5 based on Lightning interfaces, which is characterized in that the filter unit Including at least two filter.

7. according to noise cancelling headphone of the claim 1-6 any one of them based on Lightning interfaces, which is characterized in that described Noise cancelling headphone further includes the memory module for storing communicating data, and the memory module is electrically connected with the second microphone.