CN103945293A - Noise reduction system, and earphone and portable electronic device having the noise reduction system - Google Patents
Noise reduction system, and earphone and portable electronic device having the noise reduction system Download PDFInfo
- Publication number
- CN103945293A CN103945293A CN201310022512.3A CN201310022512A CN103945293A CN 103945293 A CN103945293 A CN 103945293A CN 201310022512 A CN201310022512 A CN 201310022512A CN 103945293 A CN103945293 A CN 103945293A
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- Prior art keywords
- noise reduction
- reduction system
- sound
- earphone
- processor
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Classifications
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F11/00—Methods or devices for treatment of the ears or hearing sense; Non-electric hearing aids; Methods or devices for enabling ear patients to achieve auditory perception through physiological senses other than hearing sense; Protective devices for the ears, carried on the body or in the hand
- A61F11/06—Protective devices for the ears
- A61F11/08—Protective devices for the ears internal, e.g. earplugs
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F11/00—Methods or devices for treatment of the ears or hearing sense; Non-electric hearing aids; Methods or devices for enabling ear patients to achieve auditory perception through physiological senses other than hearing sense; Protective devices for the ears, carried on the body or in the hand
- A61F11/06—Protective devices for the ears
- A61F11/14—Protective devices for the ears external, e.g. earcaps or earmuffs
- A61F11/145—Protective devices for the ears external, e.g. earcaps or earmuffs electric, e.g. for active noise reduction
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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Biomedical Technology (AREA)
- Acoustics & Sound (AREA)
- Biophysics (AREA)
- Otolaryngology (AREA)
- Psychology (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Heart & Thoracic Surgery (AREA)
- Vascular Medicine (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Soundproofing, Sound Blocking, And Sound Damping (AREA)
Abstract
The invention relates to a noise reduction system, and is applied to an earphone. The noise reduction system comprises a sound collector and a processor, the sound collector is used for collecting environmental noise of an environment where the earphone is, the processor is electrically connected to the sound collector and used for receiving an audio signal that an electronic device outputs to the earphone and environmental noise collected by the sound collector, and the processor is also used for comparing the received environmental noise with a preset threshold value, filtering sound with a decibel value higher than the threshold value in the environmental noise, and synthesizing sound with a decibel value lower than the threshold value in the environmental noise and the audio signal received from the electronic device and outputting to an earplug of the earphone. The invention also relates to an earphone and a portable electronic device having the noise reduction system.
Description
Technical field
The present invention relates to a kind of noise reduction system, relate in particular to a kind of noise reduction system of earphone and portable electron device, the earphone with this noise reduction system and portable electron device of being applied to.
Background technology
User is using in earphone listens to the audio signal such as voice or music, may be subject to the impact of external environment noise and cannot not hear the audio signal of being exported by earphone.For isolated environment noise, on the earplug of some earphones, be often coated one deck sponge, to fill in after ear, sponge fully contacts with duct, so can be preferably, even fully isolated external noise.But, in the case, in isolated external noise, also that useful outside source of sound is all isolated, so may cause user's inconvenience.
Summary of the invention
For above-mentioned the deficiencies in the prior art, be necessary to provide a kind of noise reduction system of avoiding complete isolated environment noise.
In addition, be also necessary to provide a kind of earphone with described noise reduction system.
In addition, be also necessary to provide a kind of portable electron device with described noise reduction system.
A kind of noise reduction system, comprise sound collector and processor, described sound collector is for gathering the ambient noise of its environment of living in, described processor is electrically connected to described sound collector, for receiving the audio signal of an audio output circuit output and the ambient noise that described sound collector collects, described processor is also for comparing the ambient noise receiving and a default threshold values, in filtering environmental noise, decibel value is higher than the sound of this threshold values, and decibel value in this ambient noise is synthesized to rear output lower than the sound of this threshold values and the audio signal of audio output circuit output.
A kind of earphone, comprises earplug, earplug set and above-mentioned noise reduction system, described earplug set coated with described earplug on, for fully contacting with isolated environment noise with user's duct, described processor exports the audio signal after synthetic to the earplug of earphone.
A kind of portable electron device, comprises audio output circuit, audio interface and above-mentioned noise reduction system, and described audio output circuit is for output audio signal, and described processor exports the audio signal after synthetic to described audio interface.
Described noise reduction system is greater than the noise of pre-set threshold value by decibel value in processor filtering environmental noise, be less than the sound of pre-set threshold value and export earplug to and retain decibel value, so, the noise of less decibel value can be exported to user listens to, in avoiding larger decibel value noise to impact user's audibility, can avoid user to leak and listen useful sound.
Brief description of the drawings
Fig. 1 is the schematic diagram of the earphone of first embodiment of the invention.
Fig. 2 is the functional block diagram of the noise reduction system of the earphone of first embodiment of the invention.
Fig. 3 is the schematic diagram of the earphone of second embodiment of the invention.
Main element symbol description
| Earphone | 100、200 |
| Earplug | 10、210 |
| Earphone cord | 20 |
| Headset plug | 30 |
| Earplug set | 40 |
| Noise reduction system | 50、250 |
| Sound collector | 51、251 |
| Processor | 52、252 |
| Adjuster | 53、253 |
| Power module | 54、254 |
| Battery | 55、255 |
| Circuit board | 57、257 |
| Box body | 60 |
Following embodiment further illustrates the present invention in connection with above-mentioned accompanying drawing.
Embodiment
Refer to Fig. 1, the earphone 100 of first embodiment of the invention comprises earplug 10, earphone cord 20, headset plug 30, earplug set 40 and noise reduction system 50.Earplug 10 is a pair of, exports respectively the audio signal of left and right sound channels.This is connected to headset plug 30 to earplug 10 by earphone cord 20.Headset plug 30 is for being electrically connected to an electronic installation, the audio signal of exporting to receive the audio output circuit of this electronic installation, as the audio signal such as music or voice of the output such as mobile phone or panel computer, and export this audio signal to earplug 10 and play.Earplug set 40 is also a pair of, is coated on respectively this on earplug 10.In the present embodiment, earplug set 40 is made up of sponge material.Fill in after people's ear duct when earplug 10, earplug set 40 fully contacts with duct, for isolated environment noise.Here the ambient noise of indication, refers in earphone 100 environment of living in other sound except the audio signal that headset plug 30 receives.Therefore, ambient noise often comprises the sound that in whole environment, multiple different sources of sound send.Frequency and the decibel value of the sound that different sources of sound send are different.
In the present embodiment, the quantity of noise reduction system 50 is one, and it is arranged on earphone cord 20.
See also Fig. 2, noise reduction system 50 comprises sound collector 51, processor 52, adjuster 53, power module 54 and battery 55.
Sound collector 51 is for gathering the ambient noise of its environment of living in, and in present embodiment, 51 of sound collectors are for gathering the ambient noise of described earphone 100 environment of living in.In the present embodiment, sound collector 51 is microphone.
Processor 52 is electrically connected to sound collector 51 and is electrically connected to headset plug 30 by earphone cord 20, for receiving the audio signal that headset plug 30 exports and receiving the ambient noise that sound collector 51 collects.Processor 52 is also for comparing the ambient noise receiving and a default threshold values, in filtering environmental noise, decibel value is higher than the sound of this threshold values, and after the audio signal of each sound channel that decibel value in this ambient noise is exported lower than sound and the headset plug 30 of this threshold values synthesizes, play to earplug 10 after exporting respectively the earphone cord 20 of corresponding sound channel to.So, user can hear the ambient noise with lower decibel value.
Because the decibel value of sound is relevant with its power and frequency, between alternative sounds, there is different frequencies, therefore, in the present embodiment, processor 52 is by obtaining in ambient noise each sound at the power spectrum of frequency domain, can be according to the power spectrum of the frequency domain of the frequency of this sound and acquisition, the corresponding decibel value that obtains this sound.Particularly, processor 52, by each sound in the ambient noise that sound collector 51 is collected, carries out real-time sampling by nyquist sampling theorem, then by Fourier expansion, can obtain the discrete power spectrum of the time domain of each sound.Because continuous signal has identical power spectrum in time domain and frequency domain, therefore, each sound is its power spectrum at frequency domain at the power spectrum of time domain, so, processor 52, according to the power spectrum of the frequency of each sound and frequency domain, can obtain the decibel value of each sound.
Adjuster 53 is electrically connected to processor 52, for regulating the size of this threshold values.By regulating the size of this threshold values, can regulate the volume of user's uppick ambient noise.In the present embodiment, adjuster 53 is a driver plate, by stirring this driver plate, can input and control signal to accordingly processor 52, thereby regulate the size of the interior default described threshold values of this processor 52.Be appreciated that described adjuster 53 also can be the button that is electrically connected to processor 52, thereby send a control signal to processor 52 by pressing button, so that described threshold values is regulated.
Power module 54 is electrically connected to sound collector 51, processor 52 and adjuster 53, for the output voltage of battery 55 is converted to corresponding operating voltage, powers to sound collector 51, processor 52 and adjuster 53.In the present embodiment, battery 55 is button cell.
In the present embodiment, earphone 100 also comprises box body 60 (as shown in Figure 1), and noise reduction system 50 also comprises circuit board 57 (as shown in Figure 1).Box body 60 is arranged on earphone cord 20; Circuit board 57 is contained in box body 60.Processor 52 and power module 54 are arranged on circuit board 57.On one of them end wall (figure is mark not) of box body 60, offer MIC (the figure period of the day from 1 p.m. to 3 p.m.), sound collector 51 is contained in box body 60 and is arranged on this end wall in abutting connection with this MIC.Adjuster 53 is arranged in box body 60, and partly exposes this box body 60 surfaces, is convenient to user and operates adjuster 53.Battery 55 is contained in box body 60.Sound collector 51, adjuster 53 and battery 55 are all electrically connected to circuit board 57 by wire, thereby are electrically connected to processor 52.Be appreciated that sound collector 51, adjuster 53 and battery 55 all can directly be arranged on circuit board 57.
Refer to Fig. 3, the earphone 200 of second embodiment of the invention has the structure roughly the same with earphone 100, difference is: earphone 200 does not comprise box body 60, and earphone 200 comprises two noise reduction systems 250, and each noise reduction system 250 is arranged in one of them earplug 210.Each noise reduction system 250 includes sound collector 251, processor 252, adjuster 253, power module 254, battery 255 and circuit board 257.Each sound collector 251 is for gathering corresponding earplug 10 ambient noise around.The ambient noise that processor 252 collects for filtering sound collector 251 is higher than the sound of pre-set threshold value, and after the audio signal that exports decibel value in this ambient noise the corresponding sound channel of this earplug 210 to lower than the sound of this threshold values and headset plug 30 synthesizes, export the earplug 210 that this is corresponding and play.For example, the sound collector 251 that is arranged at 210 li of L channel earplugs gathers this L channel earplug 210 ambient noise around, in processor 252 filtering environmental noises after the sound of decibel value higher than pre-set threshold value, after the left channel audio signal that exports decibel value in ambient noise to this L channel earplug 210 lower than the sound of this threshold values and headset plug 30 synthesizes, export this L channel earplug 210 to and play.So, be provided with separately a noise reduction system 250 because each earplug 210 is interior, can person easy to use distinguish the source direction of sound, synchronous environment noise better.
Be appreciated that, described noise reduction system 50 also can be arranged in the portable electron device such as mobile phone, panel computer, now, the microphone that described sound collector 51 carries for portable electron device, for gathering the ambient noise of this portable electron device environment of living in; The processor that described processor 52 can carry for portable electron device, also can be the processor of extra increase; The button that described adjuster 53 can carry for portable electron device, as volume adjusting key, also can be the driver plate of extra increase; The power module 54 that described power module 54 can carry for portable electron device; Described battery 54 also can be the battery that portable electron device carries.In addition, this portable electron device also comprises audio output circuit and audio interface, this audio output circuit is used for output audio signal to processor 52, in the ambient noise that described processor 52 collects sound collector 51, decibel value is higher than the sound of this threshold values, and after decibel value in this ambient noise is synthesized lower than the sound of this threshold values and audio output circuit output audio signal, export an audio interface to, export the voice signal after synthetic to audio-frequence player device by this audio interface again, as earphone, play.
Described noise reduction system 50,250 is greater than the noise of pre-set threshold value by decibel value in processor 52,252 filtering environmental noises, be less than the sound of pre-set threshold value and export earplug 10,210 to and retain decibel value, so, can be in the time of earplug set 40 complete isolated environment noise, the noise of less decibel value is exported to user to be listened to, in avoiding larger decibel value noise to impact user's audibility, can avoid user to leak and listen useful sound.
Claims (10)
1. a noise reduction system, it is characterized in that: described noise reduction system comprises sound collector and processor, described sound collector is for gathering the ambient noise of its environment of living in, described processor is electrically connected to described sound collector, for receiving the audio signal of an audio output circuit output and the ambient noise that described sound collector collects, described processor is also for comparing the ambient noise receiving and a default threshold values, in filtering environmental noise, decibel value is higher than the sound of this threshold values, and decibel value in this ambient noise is synthesized to rear output lower than the sound of this threshold values and the audio signal of audio output circuit output.
2. noise reduction system as claimed in claim 1, it is characterized in that: described processor carries out real-time sampling by each sound in described ambient noise by nyquist sampling theorem, pass through again Fourier expansion, and the discrete power that obtains the time domain of each sound is composed, described processor obtains the decibel value of each sound again according to the frequency computation part of the power spectrum of this time domain and each sound.
3. noise reduction system as claimed in claim 1, is characterized in that: described noise reduction system also comprises adjuster, and described adjuster is for regulating the size of this threshold values.
4. noise reduction system as claimed in claim 3, it is characterized in that: described adjuster is the driver plate that is electrically connected to described processor, the input under the stirring of external force of described driver plate controls signal to described controller accordingly, to regulate the size of described threshold values default in described controller.
5. noise reduction system as claimed in claim 1, it is characterized in that: described noise reduction system also comprises power module and battery, described power module, for the output voltage of described battery is converted to corresponding operating voltage, is given described processor and sound collector power supply.
6. noise reduction system as claimed in claim 5, is characterized in that: described battery is button cell.
7. an earphone, comprise earplug and earplug set, described earplug set is coated on described earplug, for fully contacting with isolated environment noise with user's duct, it is characterized in that, described earphone also comprises the noise reduction system as described in claim 1-6 any one, and described processor exports the audio signal after synthetic to the earplug of earphone.
8. earphone as claimed in claim 7, it is characterized in that: described earphone also comprises for being electrically connected to the headset plug of an electronic installation with received audio signal, connect the earphone cord of described headset plug and described earplug and be arranged at the box body on described earphone cord, described noise reduction system is arranged in described box body, the processor of described noise reduction system synthesizes decibel value in described ambient noise respectively lower than the sound of this threshold values and the audio signal of the left and right acoustic channels receiving of described headset plug in electronic installation, the earplug that exports again corresponding sound channel to is play.
9. earphone as claimed in claim 7, it is characterized in that: described earphone comprises two earplugs and two noise reduction systems, each noise reduction system is arranged in one of them corresponding earplug, and the processor of each noise reduction system synthesizes lower than the sound of this threshold values and described earplug decibel value in described ambient noise from the audio signal of the corresponding sound channel in electronic installation.
10. a portable electron device, comprise audio output circuit and audio interface, described audio output circuit is for output audio signal, it is characterized in that: described portable electron device also comprises the noise reduction system as described in claim 1-6 any one, wherein, described processor exports the audio signal after synthetic to described audio interface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310022512.3A CN103945293A (en) | 2013-01-22 | 2013-01-22 | Noise reduction system, and earphone and portable electronic device having the noise reduction system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310022512.3A CN103945293A (en) | 2013-01-22 | 2013-01-22 | Noise reduction system, and earphone and portable electronic device having the noise reduction system |
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| CN103945293A true CN103945293A (en) | 2014-07-23 |
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| CN201310022512.3A Pending CN103945293A (en) | 2013-01-22 | 2013-01-22 | Noise reduction system, and earphone and portable electronic device having the noise reduction system |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104602162A (en) * | 2014-12-17 | 2015-05-06 | 惠州Tcl移动通信有限公司 | External noise reduction device for mobile terminal and noise reduction method of external noise reduction device |
| CN105183946A (en) * | 2015-08-11 | 2015-12-23 | 珠海格力电器股份有限公司 | Air conditioner based denoising method and system |
| CN105744407A (en) * | 2014-12-09 | 2016-07-06 | 苏州欧利嘉电子有限公司 | Multifunctional earphone |
| WO2016119108A1 (en) * | 2015-01-26 | 2016-08-04 | 深圳市冠旭电子有限公司 | Earphone noise reduction control method and apparatus |
| WO2016183712A1 (en) * | 2015-05-15 | 2016-11-24 | 华为技术有限公司 | Method and terminal for configuring noise reduction earphone, and noise reduction earphone |
| WO2017143713A1 (en) * | 2016-02-22 | 2017-08-31 | 深圳市树源科技有限公司 | Headset having automatic volume adjustment function and automatic volume adjustment method therefor |
| CN109314814A (en) * | 2018-09-11 | 2019-02-05 | 深圳市汇顶科技股份有限公司 | Active denoising method and earphone |
| CN112168493A (en) * | 2020-09-27 | 2021-01-05 | 浙江浚源园林景观有限公司 | Noise reduction device with adjustable decibels |
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| CN109314814A (en) * | 2018-09-11 | 2019-02-05 | 深圳市汇顶科技股份有限公司 | Active denoising method and earphone |
| CN112168493A (en) * | 2020-09-27 | 2021-01-05 | 浙江浚源园林景观有限公司 | Noise reduction device with adjustable decibels |
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Application publication date: 20140723 |