A kind of noise cancelling headphoneTechnical field
The utility model relates to acoustic energy switch technology field, and more specifically, the utility model relates to a kind of noise cancelling headphone.
Background technology
At present, one end of the miaow bar of headphone is positioned on the earmuff of left earphone or right earphone, the end of miaow bar as far as possible near user's mouth to obtaining voice clearly when conversing.Common earphone, miaow bar is having a microphone, for received speech signal near mouth place, but in a noisy environment, when especially using in the noisy environments such as bar, microphone meeting pick-up noise signal simultaneously, causes the other side can to hear the voice of user.
Utility model content
An object of the present utility model solves existing earphone to gather noise under noisy environment, makes the other side can hear the technical problem of the voice of user
According to an aspect of the present utility model, provide a kind of noise cancelling headphone.This earphone comprises:
Headset body, the right earphone comprising left earphone and be connected with described left earphone;
The miaow bar be rotationally connected with described headset body, described miaow bar is provided with speech microphone and multiple noise microphone, has the spacing of setting between adjacent microphone; And
The signal processing unit be connected with described speech microphone and noise microphone signal, receive the multiple noise signals from multiple noise microphone, input multiple noise signal, export the anti-noise signal anti-phase with noise signal, noise signal is superposed with anti-noise signal, to reduce noise.
Preferably, the spacing between adjacent microphone is equal.
Preferably, described speech microphone is located at the end of described miaow bar and the side of close user.
Preferably, the side away from user is located at by described noise microphone.
Preferably, described noise microphone is 3.
Preferably, described noise microphone is 4.
Preferably, described miaow bar rotates up and down along described headset body, with the setting range making described speech microphone be positioned at user's mouth.
Preferably, described left earphone is located at by described miaow bar.
Preferably, described right earphone is located at by described miaow bar.
Preferably, described miaow bar is less than or equal to 5 ° along the angle that described headset body rotates up and down.
A technique effect of the present utility model is, this earphone is provided with multiple noise reduction microphone, has the spacing of setting between multiple adjacent microphone.Multiple noise reduction microphone receives noise signal, due to the existence of the spacing of setting, certain time delay can be there is between the noise signal received, to make noise signal more accurate, the multiple noise signals received process by signal processing chip, obtain anti-phase noise signal, then anti-phase noise signal is superposed with the audio signal received, to reduce noise.Even if use in a noisy environment, this earphone also can effectively reduce noise, make call to the sound clearly can hearing earphone user.
By referring to the detailed description of accompanying drawing to exemplary embodiment of the present utility model, further feature of the present utility model and advantage thereof will become clear.
Accompanying drawing explanation
What form a part for specification drawings describes embodiment of the present utility model, and together with the description for explaining principle of the present utility model.
Fig. 1: the structure chart of the utility model embodiment noise cancelling headphone;
Fig. 2: the exploded view of the utility model embodiment noise cancelling headphone;
Fig. 3: the structure chart of the utility model embodiment miaow bar.
Wherein, 1: miaow bar; 101: speech microphone; 102: noise microphone; 2: left earphone; 3: right earphone.
Embodiment
Various exemplary embodiment of the present utility model is described in detail now with reference to accompanying drawing.It should be noted that: unless specifically stated otherwise, otherwise positioned opposite, the numerical expression of the parts of setting forth in these embodiments and step and numerical value do not limit scope of the present utility model.
Illustrative to the description only actually of at least one exemplary embodiment below, never as any restriction to the utility model and application or use.
The technology and equipment known for person of ordinary skill in the relevant may not discuss in detail, but in the appropriate case, described technology and equipment should be regarded as a part for specification.
In all examples with discussing shown here, any occurrence should be construed as merely exemplary, instead of as restriction.Therefore, other example of exemplary embodiment can have different values.
It should be noted that: represent similar terms in similar label and letter accompanying drawing below, therefore, once be defined in an a certain Xiang Yi accompanying drawing, then do not need to be further discussed it in accompanying drawing subsequently.
The utility model provides a kind of noise cancelling headphone, and with reference to Fig. 1-3, this earphone is headphone, and it comprises: headset body, miaow bar 1 and signal processing unit.It will be understood by those skilled in the art that headphone body generally comprises left earphone 2 and right earphone 3, connected between left earphone 2 and right earphone 3 by headband, headband is also provided with the data wire for transmitting audio signal.Headband can shrink according to the use habit of user, can better fit with right earphone 3 to make left earphone 2 with the ear of user.The earphone that the utility model provides also is provided with miaow bar 1, and one end and the left earphone 2 of miaow bar 1 are rotationally connected.Miaow bar 1 is provided with the speech microphone 101 for conversing and the multiple noise microphones 102 for reducing environmental noise, has the spacing of setting between microphone.Those skilled in the art can design this spacing as required.Miaow bar 1 can rotate up and down around left earphone 2, to make the mouth of speech microphone 101 near user of miaow bar 1 end, adapts to the use habit of different users.Certainly, miaow bar 1 also can be located at right earphone 3, and miaow bar 1 can rotate up and down around right earphone 2.Preferred slewing area is, the angle that miaow bar 1 rotates around earphone is less than or equal to 5 °, to ensure the mouth of speech microphone 101 near user.Certainly, angle those skilled in the art that miaow bar 1 rotates around earphone can design according to actual needs, to meet the use habit of different users.
With reference to Fig. 3, the noise cancelling headphone that the utility model provides also comprises the signal processing unit (not shown) be connected with speech microphone 101 and noise microphone 102 signal.This noise cancelling headphone is provided with multiple noise microphone 102, and multiple noise microphone 102 has the spacing of setting, and therefore, the noise signal that multiple noise microphone 102 receives has certain time delay.Signal processing unit identified multiple noise signal according to the time delay time difference of setting; Then, multiple noise signal is superposed and processes, to obtain the anti-noise signal anti-phase with noise; Finally, export the anti-noise signal anti-phase with noise signal, noise signal is superposed with anti-noise signal, to reduce noise.Make call to the sound can hearing earphone user clearly.
Further, in one embodiment, the spacing between adjacent microphone is equal, and such signal processing unit can better identify multiple noise signal and process.And the algorithm of signal processing unit can be made simpler.
Especially, speech microphone 101 is located at the end of miaow bar 1 and the side of close user.Speech microphone 101 should be tried one's best near the mouth of user, better to receive voice.Certainly, according to the use habit of different users, those skilled in the art can design the direction of speech microphone 101, and the utility model does not limit this.Similarly, the direction of noise microphone 102 also can be designed as required, accepts noise signal with maximized.
In another embodiment, with reference to Fig. 2, noise microphone 102 is 3, and 3 noise microphones 102 are arranged at the side away from user.This mode can make noise microphone 102 away from speech utterance point, avoids noise signal and voice signal to produce and interferes, thus can better reception environment noise.Certainly, the direction of noise microphone 102 also can upward or down, not limit this utility model.
In yet, noise microphone 102 is 4, and 4 noise microphones 102 are arranged at the side away from user.This mode can gather noise signal more accurately, thus reaches better noise reduction.
The noise cancelling headphone that the utility model provides, even if use in a noisy environment, also effectively can reduce noise, make call to the sound can hearing user clearly.
Although be described in detail specific embodiments more of the present utility model by example, it should be appreciated by those skilled in the art, above example is only to be described, instead of in order to limit scope of the present utility model.It should be appreciated by those skilled in the art, when not departing from scope and spirit of the present utility model, above embodiment can be modified.Scope of the present utility model is limited by claims.