CN201207642Y - Wireless noise reducing earphone - Google Patents

Wireless noise reducing earphone Download PDF

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Publication number
CN201207642Y
CN201207642Y CNU200820046788XU CN200820046788U CN201207642Y CN 201207642 Y CN201207642 Y CN 201207642Y CN U200820046788X U CNU200820046788X U CN U200820046788XU CN 200820046788 U CN200820046788 U CN 200820046788U CN 201207642 Y CN201207642 Y CN 201207642Y
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CN
China
Prior art keywords
noise
loudspeaker
circuit
source
wireless
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
CNU200820046788XU
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Chinese (zh)
Inventor
温达成
符诗华
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OCVACO Electronic Ltd.
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符诗华
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Publication date
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Priority to CNU200820046788XU priority Critical patent/CN201207642Y/en
Application granted granted Critical
Publication of CN201207642Y publication Critical patent/CN201207642Y/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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  • Soundproofing, Sound Blocking, And Sound Damping (AREA)
  • Circuit For Audible Band Transducer (AREA)

Abstract

The utility model discloses a pair of wireless noise reduction headphones, comprising a wireless receiving circuit that is matched with a wireless transmitting circuit at the position of a sound source device to slip the leash of a lead, a noise acquisition circuit is arranged at the position of a horn for acquiring noise signals, noise signals and sound source signals input by the noise acquisition circuit are mixed, then the sound source signals are filtered out by a low-pass filter and a reversing circuit, and then the filtered signals are output to the horn after being reversed, the influence of the ambient noise can be effectively eliminated, and users can use the headphones under different conditions and will not be affected by background noise, so the headphones bring great convenience for people.

Description

Wireless noise cancelling headphone
Technical field
The utility model relates to a kind of earphone, more particularly, relates to a kind of wireless headset with decrease of noise functions.
Background technology
Traditional earphone mainly is a wired earphone, termination at lead has audio jack, and the other end is connected to the toy trumpet that is used for restoring acoustical signal, during assembling, it can be loaded in the small-sized earplug to make PlayGear Stealth, also it can be loaded in the earmuff to make circumaural earphone.In use be subjected to the influence of environmental noise in order to solve earphone, a kind of earphone with decrease of noise functions has appearred in the existing wired earphone, has good result of use, yet this does not fundamentally solve wired earphone and uses inconvenient inherent shortcoming, and the appearance of wireless (cordless) technology makes conventional earphone break away from the constraint of lead.By wireless transmission circuit being set, and in earphone, wireless receiving circuit is set, can realizes the valid wireless transmission at the sound source place.The user wears after this wireless headset, can receive audio signal in the larger context effectively, yet because technology etc., the decrease of noise functions of wired earphone still fails to use in the wireless headset field.
Summary of the invention
In order to overcome the deficiencies in the prior art, the utility model provides a kind of result of use good wireless noise cancelling headphone.
The technical scheme that its technical problem that solves the utility model adopts is:
Wireless noise cancelling headphone, comprise wireless receiving circuit and loudspeaker with the radio transmitter at sound source place coupling, described loudspeaker place is equipped with the noise Acquisition Circuit that is used for the acquisition noise signal, wireless receiving circuit one tunnel output sound source signal is given loudspeaker, another road is as the output of the source of sound signal of reference usefulness, the noise warning signal of noise Acquisition Circuit input and source of sound signal mix after low pass filter and negater circuit filtering source of sound signal and oppositely after export to loudspeaker.
In order to increase the power of output, earphone of the present utility model comprises amplifier; Wireless receiving circuit is given loudspeaker through amplifier output sound source signal, and the source of sound signal and the noise warning signal of wireless receiving circuit and the output of noise Acquisition Circuit are exported to loudspeaker after resistance R 4 is mixed.
The beneficial effects of the utility model are: earphone of the present utility model comprises the wireless receiving circuit with the radio transmitter at sound source place coupling, can break away from the constraint of lead, the loudspeaker place is equipped with the noise Acquisition Circuit that is used for the acquisition noise signal, the noise warning signal of noise Acquisition Circuit input and source of sound signal mix after low pass filter and negater circuit filtering source of sound signal and oppositely after export to loudspeaker, can eliminate influence of environmental noise effectively, the user uses under different environment and is not subjected to the influence of background noise, can bring many convenience to people.
Description of drawings
Below in conjunction with drawings and Examples the utility model is further specified.
Fig. 1 is principle of noise reduction figure;
Fig. 2 is the noise reduction block diagram;
Fig. 3 is a functional-block diagram of the present utility model;
Fig. 4 is the single sound channel Dolby circuit figure of the utility model embodiment;
Fig. 5 is the radio transmitter figure of the utility model embodiment;
Fig. 6 is wired radiating circuit figure of the utility model embodiment.
Embodiment
With reference to Fig. 3, wireless noise cancelling headphone, comprise wireless receiving circuit 2 and loudspeaker 4 with radio transmitter 1 coupling at sound source place, described loudspeaker 4 places are equipped with the noise Acquisition Circuit 5 that is used for the acquisition noise signal, wireless receiving circuit 2 one tunnel output sound source signals are given loudspeaker, another road is as the source of sound signal output of reference usefulness, the noise warning signal of noise Acquisition Circuit 5 input and source of sound signal mix on the resistance R 4 after low pass filter 6 and negater circuit 7 filtering source of sound signals and oppositely after export to loudspeaker 4, in the Acquisition Circuit of noise described in the utility model 5 are microphones, and microphone and loudspeaker are installed in the ear cup.
In order to increase the power of output, earphone of the present utility model comprises amplifier 3; Wireless receiving circuit 2 is given loudspeaker 4 through amplifier 3 output sound source signals; The source of sound signal of described wireless receiving circuit and the output of noise Acquisition Circuit and noise warning signal are exported to loudspeaker after resistance R 4 is mixed.
Fig. 5 is the radio transmitter figure of the utility model embodiment; Fig. 6 is wired radiating circuit figure of the utility model embodiment; Fig. 1 is principle of noise reduction figure of the present utility model, and two equal sound of phase place opposite magnitude are occurring at the same time, and sound will be cancelled out each other, and the utility model is eliminated noise with this principle.
With reference to Fig. 2, Fig. 4, that shown in Figure 4 is single sound channel Dolby circuit figure, is exactly stereo noise cancelling headphone after two groups of same circuits are synthetic.Microphone in ear cup is collected music and noise simultaneously, at first musical sound is deducted, through anti-phase left noise again behind the filter, at last anti-phase noise is added to loudspeaker with music, just anti-phase noise is eliminated, only remaining music, reach denoising effect, microphone receives the signal of returning through inductance L 1 from earphone, capacitor C 1, the low pass filter that capacitor C 2 and resistance R 1 are formed filters the back and mixes at R4 as the source of sound signal with reference to usefulness, through U1 remove music signal and remaining treat that noise warning signal is anti-phase and amplify after transport to loudspeaker, positive and negative phase noise in loudspeaker is cancelled each other, reach the noise reduction purpose, can eliminate influence of environmental noise effectively, the user uses under different environment and is not subjected to the influence of background noise, can bring many convenience to people.

Claims (4)

1, wireless noise cancelling headphone, it is characterized in that it comprises wireless receiving circuit (2) and loudspeaker (4) with the radio transmitter at sound source place coupling, described loudspeaker (4) locate to be equipped with the noise Acquisition Circuit (5) that is used for the acquisition noise signal, wireless receiving circuit (2) one tunnel output sound source signals are given loudspeaker, another road is as the output of the source of sound signal of reference usefulness, the noise warning signal of noise Acquisition Circuit (5) input and source of sound signal mix after low pass filter (6) and negater circuit (7) filtering source of sound signal and oppositely after export to loudspeaker (4).
2, wireless noise cancelling headphone according to claim 1 is characterized in that the source of sound signal of described wireless receiving circuit (2) and noise Acquisition Circuit (5) output and noise warning signal export to loudspeaker after resistance R 4 is mixed.
3, wireless noise cancelling headphone according to claim 1 is characterized in that this earphone comprises amplifier (3); Wireless receiving circuit (2) is given loudspeaker (4) through amplifier (3) output sound source signal.
4,, it is characterized in that the source of sound signal of described wireless receiving circuit (2) and noise Acquisition Circuit (5) output and noise warning signal export to loudspeaker through amplifier (3) again after resistance R 4 is mixed according to claim 2 or 3 described wireless noise cancelling headphones.
CNU200820046788XU 2008-04-23 2008-04-23 Wireless noise reducing earphone Expired - Lifetime CN201207642Y (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CNU200820046788XU CN201207642Y (en) 2008-04-23 2008-04-23 Wireless noise reducing earphone

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CNU200820046788XU CN201207642Y (en) 2008-04-23 2008-04-23 Wireless noise reducing earphone

Publications (1)

Publication Number Publication Date
CN201207642Y true CN201207642Y (en) 2009-03-11

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CNU200820046788XU Expired - Lifetime CN201207642Y (en) 2008-04-23 2008-04-23 Wireless noise reducing earphone

Country Status (1)

Country Link
CN (1) CN201207642Y (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012022220A1 (en) * 2010-08-20 2012-02-23 Li Xiao Noise reduction headphones and method for reducing headphone noise and distortion
CN105142088A (en) * 2015-08-19 2015-12-09 深圳航天金悦通科技有限公司 Low-noise-free hearing aid device and method
CN106817644A (en) * 2017-02-21 2017-06-09 上海青橙实业有限公司 A kind of mobile terminal and head circuit
CN114822469A (en) * 2021-10-22 2022-07-29 佛山博智医疗科技有限公司 Audiometry system with intelligent noise reduction function

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012022220A1 (en) * 2010-08-20 2012-02-23 Li Xiao Noise reduction headphones and method for reducing headphone noise and distortion
CN105142088A (en) * 2015-08-19 2015-12-09 深圳航天金悦通科技有限公司 Low-noise-free hearing aid device and method
CN106817644A (en) * 2017-02-21 2017-06-09 上海青橙实业有限公司 A kind of mobile terminal and head circuit
CN114822469A (en) * 2021-10-22 2022-07-29 佛山博智医疗科技有限公司 Audiometry system with intelligent noise reduction function

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Legal Events

Date Code Title Description
C14 Grant of patent or utility model
GR01 Patent grant
ASS Succession or assignment of patent right

Owner name: ZHONGSHAN AOKAIHUATAI ELECTRONICS CO., LTD.

Free format text: FORMER OWNER: FU SHIHUA

Effective date: 20091211

C41 Transfer of patent application or patent right or utility model
TR01 Transfer of patent right

Effective date of registration: 20091211

Address after: Building four or five, building 142, No. 1 South Tan Road, Tanzhou Town, Guangdong City, Zhongshan Province, China: 528400

Patentee after: OCVACO Electronic Ltd.

Address before: Guangdong province Zhongshan city Tanzhou town god Tan Road No. 142 OVC Science Park, zip code: 528400

Patentee before: Fu Shihua

CX01 Expiry of patent term
CX01 Expiry of patent term

Granted publication date: 20090311