CN201928407U - Ear muff and noise reduction headset - Google Patents
Ear muff and noise reduction headset Download PDFInfo
- Publication number
- CN201928407U CN201928407U CN2010206409921U CN201020640992U CN201928407U CN 201928407 U CN201928407 U CN 201928407U CN 2010206409921 U CN2010206409921 U CN 2010206409921U CN 201020640992 U CN201020640992 U CN 201020640992U CN 201928407 U CN201928407 U CN 201928407U
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- earmuff
- ear pad
- ear
- grid net
- utility
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Abstract
The utility model is applicable to the technical field of electronic products, and provides an ear muff and a noise reduction headset adopting the ear muff, comprising a body provided with an inner cavity and an ear pad arranged at the edge of the inner cavity, wherein the ear pad has an elliptical annular structure which is adapted to the shape of an external ear, and the inner annular side wall of the annular structure of the ear pad is provided with a grid net. In the utility model, the inner side of the ear pad is designed to be provided with the breathable type grid net, when the ear pad is applied on the headset, on the one hand, the equivalent volume of the ear pad is increased, so as to obtain needed equivalent volume and appropriate damping coefficient in the ear muff, and prevent the occurrence of self-excitation, and reduce negative pressure effect produced in a closed state; and on the other hand, the breathable type grid net improves frequency response superposition effect produced in the process of coupling or feedback, reduces sound pressure level (SPL) peak and unevenness of bandwidth produced in sound wave reflection; meanwhile, the grid net has good air permeability, so as to also greatly improve the comfort when a user wears the noise reduction headset.
Description
Technical field
The utility model belongs to technical field of electronic products, more particularly, relates to a kind of earmuff and adopts the wear-type noise cancelling headphone of this earmuff.
Background technology
Along with improving constantly of living standard, listening attentively to music becomes people in the work mood of releiving after the leisure, a kind of mode that eases off the pressure.Simultaneously, along with the continuous pursuit of people to high-quality life, people also require high more for the quality of earphone.And the starting point that manufacturer combines from humanistic care and health idea in order to allow each user can both listen to the true pure tone of life in noisy environment, and can be protected hearing, satisfies the demands of consumers and develop intelligent noise cancelling headphone.
Noise cancelling headphone in the market mainly is to realize noise reduction by internal circuit, and does not externally have special noise reduction process on the structure.
The utility model content
Technical problem to be solved in the utility model is to overcome the defective of prior art, provides a kind of and makes improvements on structure, and improve the earmuff of noise reduction and adopt the wear-type noise cancelling headphone of this earmuff.
For solving the problems of the technologies described above, the technical solution of the utility model is: a kind of earmuff is provided, comprise one have the body of inner chamber and be located in the ear pad of cavity edge, described ear pad is the elliptical annular structure that adapts to the external ear shape, the interior ring-side wall of described ear pad circulus has the grid net.
Particularly, each online grid of described grid assume diamond in shape, square or circular.
Further, the area of described grid net is 40cm
2～50cm
2
Further, the area of described grid net accounts for 45%～60% of described elliptical annular structural outer surface area.
Particularly, be provided with driver and transducer in the described inner chamber, described driver is provided with diaphragm, and described transducer is located at the top edges of described diaphragm place one side, and the sensitive surface of described transducer is identical with the direction of vibration of described diaphragm.
Preferably, also be filled with the high damping mandruka between described inner chamber and the described ear pad.
Further, also be provided with an opening on the shell of described earmuff, be coated with the net sheet on the described opening.
Further, also be provided with power supply, circuit board in the described inner chamber, described transducer is connected between described power supply and the described circuit board, and described circuit board is connected with described driver, also is provided with one on the described body and can stretches into the interface that is connected with described circuit board for the audio signal connecting line.
The utility model also provides a kind of wear-type noise cancelling headphone, comprises a headband, and wherein the two ends of headband are provided with above-mentioned earmuff.
In the utility model, the ear pad inboard is designed to the grid net of permeability type, in the time of on being applied to earphone, increased the equivalent volume of ear pad self on the one hand, thereby make and to obtain required equivalent volume and suitable damping coefficient in the earmuff, prevent self-excitation, alleviated the underbalance effect that under closed state, produces; On the other hand, the grid net of permeability type has improved the frequency response synergistic effect that produces in coupling or the feedback procedure, has reduced sound pressure level peak value and bandwidth unevenness that acoustic reflection produces; Simultaneously, grid net good permeability has also improved the comfort level the when user wears greatly.
Description of drawings
Fig. 1 is the structural representation of a preferred embodiment of the earmuff that provides of the utility model;
Fig. 2 is that cuing open of ear pad shown schematic diagram among the utility model embodiment;
Fig. 3 is that cuing open of earmuff shown schematic diagram among the utility model embodiment;
Fig. 4 is earmuff one schematic perspective view among the utility model embodiment;
Fig. 5 is another schematic perspective view of earmuff among the utility model embodiment;
Fig. 6 is the fundamental diagram of circuit board among the utility model embodiment;
Fig. 7 is the perspective view of a preferred embodiment of the utility model wear-type noise cancelling headphone.
Embodiment
In order to make the purpose of this utility model, technical scheme and advantage clearer,, the utility model is further elaborated below in conjunction with drawings and Examples.Should be appreciated that specific embodiment described herein only in order to explanation the utility model, and be not used in qualification the utility model.
The utility model provides a kind of earmuff, comprise one have the body of inner chamber and be located in the ear pad of cavity edge, described ear pad is the elliptical annular structure that adapts to the external ear shape, the interior ring-side wall of described ear pad circulus has the grid net.
In the utility model, the ear pad inboard is designed to the grid net of perforate, has increased the equivalent volume of ear pad self on the one hand, thereby make and to obtain required equivalent volume and suitable damping coefficient in the earmuff, prevent self-excitation, alleviated the underbalance effect that under closed state, produces; On the other hand, the grid net of permeability type has improved the frequency response synergistic effect that produces in coupling or the feedback procedure, has reduced sound pressure level peak value and bandwidth unevenness that acoustic reflection produces; Simultaneously, grid net good permeability has also improved the comfort level the when user wears greatly.
Be described in detail below in conjunction with the specific implementation of accompanying drawing the utility model embodiment.
Referring to figs. 1 through Fig. 3, earmuff 1 comprises that one has the body 2 of inner chamber 21 and is located at the ear pad 3 at inner chamber 21 edges.Ear pad 3 is the elliptical annular structure that adapts to the external ear shape.Ear pad 3 is made by protein cladding 31 and grid net 32, and filling is remembered sponge 33 and formed in it.In the present embodiment, grid net 32 is a gauze.
As an embodiment of the present utility model, protein cladding 31 is positioned at the outer surface of ellipsoidal structure.In use, ring in people's ear places just, thus obtain air-tight state preferably, prevent that effectively noise from importing into from the external world.And behind the ring, place the protein cladding 31 of outer surface to contact with the skin of head just in people's ear places, the softness that itself has owing to protein cladding 31 makes people's comfortable wearing, and air-tightness is good, has improved the effect of passive noise reduction; Simultaneously, protein cladding 31 antiseptic properties are fabulous, therefore also prolonged the useful life of ear pad 3; In addition, protein cladding Long contact time skin can keep constant temperature, can not cause wear uncomfortable because of heating.
As an embodiment of the present utility model, grid net 32 is positioned on the sidewall of ring of elliptical annular structure.Grid net 32 structural designs that this perforate is ventilative, on the one hand, effectively increased the equivalent volume of ear pad 3 self, thereby adjust the required equivalent volume of earmuff 1 and obtain suitable damping coefficient by the equivalent volume that increases ear pad 3, prevent earphone generation self-excitation, alleviated the underbalance effect that under closed state, produces; On the other hand, perforate grid on the grid net 32 has improved the frequency response synergistic effect that produces in coupling and the feedback procedure, the sound pressure level peak value that reduction produces because of acoustic reflection and the unevenness of bandwidth, in 500～1200Hz frequency band range, can reduce peak value 4～6dB especially, also resisted the self-excitation that produces under the earphone operating state, make the frequency response curve of whole frequency band more level and smooth, broad, thereby guaranteed the stereovision and the soften of tonequality; Simultaneously, the grid good permeability of grid net 32, improve the comfort level of wearing, when earmuff 1 should be in earphone, earphone is worn on when last because of under the chucking power effect, grid on the grid net 32 can be discharged the air in the ear pad 3 rapidly and be made ear pad 3 fit in people's ear better, improves sealing, plays the effect of passive noise control.After earphone took off from the head, air was filled in the memory sponge 33 by grid net 32 rapidly again, thereby has kept ear pad 3 outward appearance integrality and stability.
In the present embodiment, in protein cladding 31 and grid net 32, fill memory sponge 33.Memory sponge 33 is absorbing impulsive force, is reducing terms of mechanics such as shaking, hang down bounce release, and performance is leading.And its gas permeability, good hygroscopicity, human body contact impression is comfortable.
Further, as an embodiment of the present utility model, the shape that assumes diamond in shape of each grid on the grid net 32.Diamond structure is the sesame seed size, has not only guaranteed the compactness of whole grid screen cloth braiding, has also guaranteed gas permeability.Certainly each grid also can be square, circular or other shape.
Further, the area of grid net 32 is 40cm
2～50cm
2, and it accounts for 45%～60% of protein cladding 31 areas.Adopt the size and the ratio of this perforated area, have best acoustic absorptivity and absorption, can improve noise reduction ratio and the smoothness of improving the frequency response curve of earphone to greatest extent.In addition, this ratio can strengthen the flexibility of ear pad, the influence of minimizing negative pressure, and it is comfortable more naturally that the user is worn.
As an embodiment of the present utility model, please refer to Fig. 3, Fig. 4, be provided with a support 4 in the inner chamber 21, fix a driver 5 in the below of support 4, driver 5 is provided with the diaphragm (not shown), and diaphragm is positioned on the driver 5 and a side of close support 4.Top one lateral edges of support 4 is provided with a transducer 6.The sensitive surface of transducer 6 is identical with the direction of vibration of diaphragm.Like this, the direction that transducer 6 receives sound waves is promptly consistent by the direction of diaphragm radiative acoustic wave with driver 5, helps transducer 6 and detect noise in ear pad and earmuff 1 inner chamber better, in all directions in real time after earphone is worn use.
As an embodiment of the present utility model, the top edges of support 4 is provided with a holder 7, and holder 7 is a plastic cement seat.Transducer 6 adopts glue to be fixed in the holder 7.Adopt this fixed form, sealing and fixed effect are all better, effectively prevent the loosening or gas leakage of transducer 6 and cause producing in the use and utter long and high-pitched sounds and buzzer.
Further, with reference to Fig. 4, also be filled with sponge 8 between inner chamber 21 inner supports 4 and the ear pad 3, sponge 8 is the high damping mandruka, it can absorb the noisy audio signal of part in the earmuff, strengthen passive noise reduction, improve the smoothness of frequency response curve, thereby avoid producing the effect of thundering in ear pad 3 and the inner chamber 21.
Further, with reference to Fig. 5, body 2 is away from an end of ear pad 3 trim 9 that removably connects.Trim 9 is provided with an opening 91, and is coated with net sheet 92 on the opening 91.This opening 91 is adjustment damping coefficient and sound press output characteristic and designs as an acoustic resistance mouth, and net sheet 92 is for being bonded in the thin metal fine-structure mesh on the opening 91, and its thickness, fine mesh number and entrant sound amount are the balanced arrangement of noise reduction amplitude and frequency response.
As an embodiment of the present utility model, also be provided with the power supply (not shown) in the inner chamber 21, also be provided with a circuit board 10 in the below of support 4, circuit board 10 is one to have the electronics connecting plate of decrease of noise functions.Transducer 6 is connected between power supply and the circuit board 10, and circuit board 10 is connected with driver 5 simultaneously.Also be provided with one on the sidewall of body 2 and can stretch into the interface 22 that is connected with circuit board 10 for the audio signal connecting line.By interface incoming audio signal connecting line, earphone is connected with extraneous music player, and by the earphone listoning music.When electric power starting, transducer 6 detects duct, the inner chamber 21 of earmuff 1 and the environmental noise between the ear pad 3, be transferred to circuit board 10 then, circuit board 10 feeds back to driver 5 after the overcoupled circuits computing, thereby the control signal that obtains an optimum through circuit board 10 real-time operations again after driver 5 pickoff signals produces opposite with the noise waves phase place, that energy equates a sound wave and a noise waves counteracting, thereby reaches the purpose of noise reduction.
With reference to Fig. 6, be the principle of noise reduction figure of circuit board 10.Wherein, noise signal acquisition module 101 obtains noise signal.The noise signal that 102 pairs of noise signal acquisition modules 101 of noise signal amplification module obtain carries out the yardstick refinement, and the noise signal that obtains is amplified.
Preferably, described noise signal amplification module 102 specifically comprises phase place and frequency information acquisition module 1021, phase subdivision module 1022 and frequency fine sub-module 1023:
Phase place and frequency information acquisition module 1021 obtain phase place and the frequency of noise signal in cycle time;
Frequency fine sub-module 1023 is sentenced frequency at low frequency noise signal is segmented.
103 pairs of noise signals of noise signal decomposing module decompose, and obtain main noise signal and divide noise signal.
Noise signal after 104 pairs of amplifications of noise signal processing module carries out denoising Processing.
Preferably, described noise signal processing module 104 specifically comprises phase wave signal acquisition module 1041, rp-wave calculated signals module 1042 and phase wave signal cancellation module 1043:
Main noise signal and branch noise signal that phase wave signal acquisition module 1041 obtains noise signal decomposing module 103 carry out analyzing and processing, obtain corresponding phase wave signal;
Rp-wave calculated signals module 1042 rules according to system's setting calculate the rp-wave signal;
The described phase wave signal of rp-wave signal cancellation that the described rp-wave calculated signals module 1042 of phase wave signal cancellation module 1043 controls calculates.
By above-mentioned Dolby circuit, noise signal has been carried out effective active noise reduction, make on the basis of the passive noise reduction of earmuff, to obtain better noise reduction among the utility model embodiment.
With reference to Fig. 7, the perspective view of a preferred embodiment of the wear-type noise cancelling headphone 11 that provides for the utility model.Described wear-type noise cancelling headphone 11 comprises that a headband 111 and two are identical with above-mentioned earmuff 1 structure with 1, two earmuff 1 of earmuff that headband 111 two ends flexibly connect respectively, do not give unnecessary details herein.
Adopt the wear-type noise cancelling headphone 11 of above-mentioned earmuff 1, excellent noise reduction effect can better be listened to environment for the user provides.
Below only be preferred embodiment of the present utility model,, all any modifications of within spirit of the present utility model and principle, being done, be equal to and replace and improvement etc., all should be included within the protection range of the present utility model not in order to restriction the utility model.7
Claims (9)
1. earmuff, comprise one have the body of inner chamber and be located in the ear pad of cavity edge, described ear pad is the elliptical annular structure that adapts to the external ear shape, it is characterized in that: the interior ring-side wall of described ear pad circulus has the grid net.
2. earmuff as claimed in claim 1 is characterized in that: each online grid of described grid assumes diamond in shape, square or circular.
3. earmuff as claimed in claim 1 or 2 is characterized in that: the area of described grid net is 40cm
2～50cm
2
4. earmuff as claimed in claim 1 is characterized in that: the area of described grid net accounts for 45%～60% of elliptical annular structural outer surface area.
5. earmuff as claimed in claim 1, it is characterized in that: be provided with driver and transducer in the described inner chamber, described driver is provided with diaphragm, and described transducer is located at the top edges of described diaphragm place one side, and the sensitive surface of described transducer is identical with the direction of vibration of described diaphragm.
6. earmuff as claimed in claim 5 is characterized in that: also be filled with the high damping mandruka between described inner chamber and the described ear pad.
7. earmuff as claimed in claim 5 is characterized in that: also be provided with an opening on the shell of described earmuff, be coated with the net sheet on the described opening.
8. earmuff as claimed in claim 5, it is characterized in that: also be provided with power supply, circuit board in the described inner chamber, described transducer is connected between described power supply and the described circuit board, described circuit board is connected with described driver, also is provided with one on the described body and can stretches into the interface that is connected with described circuit board for the audio signal connecting line.
9. wear-type noise cancelling headphone comprises a headband and is located at the earmuff at headband two ends, it is characterized in that: described earmuff is for as each described earmuff in the claim 1 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206409921U CN201928407U (en) | 2010-12-03 | 2010-12-03 | Ear muff and noise reduction headset |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206409921U CN201928407U (en) | 2010-12-03 | 2010-12-03 | Ear muff and noise reduction headset |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201928407U true CN201928407U (en) | 2011-08-10 |
Family
ID=44432240
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010206409921U Expired - Fee Related CN201928407U (en) | 2010-12-03 | 2010-12-03 | Ear muff and noise reduction headset |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201928407U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013174054A1 (en) * | 2012-05-21 | 2013-11-28 | 东莞市晶丰电子科技有限公司 | Heating earcap suitable for headphone |
| CN110944257A (en) * | 2018-09-25 | 2020-03-31 | 宏达国际电子股份有限公司 | Head earphone |
-
2010
- 2010-12-03 CN CN2010206409921U patent/CN201928407U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013174054A1 (en) * | 2012-05-21 | 2013-11-28 | 东莞市晶丰电子科技有限公司 | Heating earcap suitable for headphone |
| CN110944257A (en) * | 2018-09-25 | 2020-03-31 | 宏达国际电子股份有限公司 | Head earphone |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110810 Termination date: 20141203 |
|
| EXPY | Termination of patent right or utility model |