CN201207642Y - Wireless noise reducing earphone - Google Patents
Wireless noise reducing earphone Download PDFInfo
- 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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- noise
- loudspeaker
- circuit
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- wireless
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- 230000005236 sound signal Effects 0.000 claims description 17
- 230000008878 coupling Effects 0.000 claims description 4
- 238000010168 coupling process Methods 0.000 claims description 4
- 238000005859 coupling reaction Methods 0.000 claims description 4
- 238000001914 filtration Methods 0.000 claims description 4
- 238000005516 engineering process Methods 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 239000003990 capacitor Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
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- Soundproofing, Sound Blocking, And Sound Damping (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
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.
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 |
Family
ID=40466698
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| 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)
| 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 |
-
2008
- 2008-04-23 CN CNU200820046788XU patent/CN201207642Y/en not_active Expired - Lifetime
Cited By (4)
| 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 |