CN205039984U - Feedforward NOISE -CANCELLING HEADPHONES - Google Patents
Feedforward NOISE -CANCELLING HEADPHONES Download PDFInfo
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- CN205039984U CN205039984U CN201520797242.8U CN201520797242U CN205039984U CN 205039984 U CN205039984 U CN 205039984U CN 201520797242 U CN201520797242 U CN 201520797242U CN 205039984 U CN205039984 U CN 205039984U
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- noise reduction
- phonation unit
- external shell
- feed forward
- lid
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- Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
Abstract
The utility model discloses a feedforward NOISE -CANCELLING HEADPHONES, including external shell, external shell's front end is provided with the lid with external shell matched with, has accommodated the phonation unit in external shell's the space, and the phonation unit includes the moving -coil phonation unit and move indisputable phonation unit, and the moving -coil phonation unit includes the vibrating diaphragm, and external shell's end is provided with the phonate hole, moves one side that is close to the phonate hole that indisputable phonation unit lies in the vibrating diaphragm, combines to have to fall the MIC that makes an uproar in the space that external shell and lid formed, is provided with the receipts sound hole in the intercommunication external world on the lid. The utility model discloses a feedforward NOISE -CANCELLING HEADPHONES can optimize high -frequency characteristic on the one hand, promotes earphone tone quality, and on the other hand can effectively realize falling and make an uproar.
Description
Technical field
The utility model relates to electroacoustic field, is specifically related to a kind of feed forward noise reduction earphone.
Background technology
Earphone is a kind of device transmitting audio signal, its application widely, often with the terminal electronics fit applications such as mobile phone, computer, MP3.Along with the development of science and technology with electron trade, people it is also proposed higher requirement for the performance of earphone.At present, promoting one of method of earphone tonequality is adopt the combination of moving-coil loudspeaker and dynamic iron loudspeaker as the phonation unit of earphone, and two kinds of loudspeaker can mutually supplement in performance, realize with this object promoting tonequality.
For the overall performance of earphone, outside the tonequality of removing sounding, also relate to the noise reduction of earphone on the other hand.When using earphone in the environment that the noises such as subway, airport, railway station are larger, noise around can impact the sound effect of earphone.In order to address this problem, the scheme adopting feed forward type noise reduction is more effective mode, and existing feed forward noise reduction earphone as phonation unit, although can effective noise reduction, but cannot meet higher tonequality requirement mainly with single moving-coil loudspeaker simultaneously.But if adopt the mode of dynamic iron loudspeaker and moving-coil loudspeaker combination, the phonation unit of earphone and single moving-coil loudspeaker are as compared with phonation unit, and its structure there occurs larger change, is difficult to meet current feed forward noise reduction scheme to the requirement of phonation unit.Therefore, no matter from which angle, lifting earphone tonequality and effective noise reduction are all difficult to realize simultaneously.
Utility model content
Technical problem to be solved in the utility model is: provide a kind of feed forward noise reduction earphone, both can promote the tonequality of earphone, effectively can reduce the noise of external environment simultaneously.
To achieve these goals, the utility model by the following technical solutions: a kind of feed forward noise reduction earphone, comprises external shell; The front end of described external shell is provided with the lid matched with described external shell; Contain phonation unit in the space of described external shell, wherein, described phonation unit comprises moving-coil type phonation unit and dynamic iron phonation unit; Described moving-coil type phonation unit comprises vibrating diaphragm; The end of described external shell is provided with phonate hole; Described dynamic iron phonation unit is positioned at the side of the close described phonate hole of described vibrating diaphragm; Noise reduction MIC is combined with in the space that described external shell and described lid are formed; Described lid is provided with and is communicated with the extraneous hole that quiets down.
Improve as one, the second housing that described external shell comprises the first cylindric housing and combines with described first housing; Described moving-coil type phonation unit and described dynamic iron phonation unit are all contained in the inside cavity that described first housing and described second housing are formed.
Improve as one, in the space of described lid and described external shell, be combined with conducting wire plate; Described noise reduction MIC is incorporated into the side of described conducting wire backboard to described external shell.
Improve as one, the compartition that described external shell and described lid are formed is two mutual disconnected cavitys; Space between described conducting wire plate and described lid is noise reduction cavity; The space of described external shell is sounding cavity; Described noise reduction MIC is positioned at described noise reduction cavity.
Improve as one, the Dolby circuit of described conducting wire plate and described feed forward noise reduction earphone is interconnected.
Improve as one, described noise reduction MIC directly accesses the Dolby circuit of described feed forward noise reduction earphone.
Improve as one, the end of described second housing is provided with phonate hole; Space between the vibrating diaphragm of described moving-coil type phonation unit and described second housing phonate hole forms the passage of speaking of the front operatic tunes; Before described dynamic iron phonation unit is positioned at described moving-coil type phonation unit, the operatic tunes speaks on passage.
Improve as one, described dynamic iron phonation unit offers the sound-guiding structure be interconnected with described phonate hole.
Improve as one, described lid is the decorative cover body for the protection of described noise reduction MIC.
Improve as one, described in the hole that quiets down be strip structure.
Compared to existing technologies, feed forward noise reduction earphone of the present utility model, its phonation unit comprises moving-coil type phonation unit and dynamic iron phonation unit two parts, two phonation units can carry out work respectively when different frequency range, the earphone of this kind of structure can well take into account the performance at low-and high-frequency place, promotes the tonequality of earphone; In addition, earphone of the present utility model, is combined with noise reduction MIC in the space that its external shell and lid are formed, lid is provided with and is communicated with the extraneous hole that quiets down, can ambient noise be picked up, and carry out feed forward noise reduction in conjunction with Dolby circuit, effectively reduce the interference of the noise in external environment.In sum, earphone of the present utility model, can realize the function promoting tonequality and feed forward noise reduction simultaneously.
Accompanying drawing explanation
Fig. 1 is the explosive view of the utility model embodiment one feed forward noise reduction earphone;
Fig. 2 is the cutaway view of the utility model embodiment one feed forward noise reduction earphone;
Fig. 3 is the explosive view of the utility model embodiment two feed forward noise reduction earphone;
Fig. 4 is the cutaway view of the utility model embodiment two feed forward noise reduction earphone;
Reference numeral wherein comprises: 1, external shell, the 11, first housing, the 12, second housing, 121, phonate hole, 2, lid, 21, quiet down hole, 3, moving-coil type phonation unit, 31, vibrating diaphragm, 4, dynamic iron phonation unit, 5, noise reduction MIC, 6, conducting wire plate, 7, sounding cavity, 8, noise reduction cavity, H, Dolby circuit.
Embodiment
Below in conjunction with accompanying drawing, describe the utility model content in detail:
Consult Fig. 1, Fig. 2, Fig. 3 and Fig. 4 jointly shown in, feed forward noise reduction earphone of the present utility model, comprise external shell 1 and be arranged at the front end of external shell 1 and the lid 2 matched with external shell 1, wherein, external shell 1 comprises the first cylindric housing 11 and the second housing 12, first housing 11 of combining with the first housing 11 and the second housing 12 complement each other to form the cavity with spatial accommodation; The phonation unit of earphone is contained in the space of this cavity, in order to promote the tonequality of earphone, feed forward noise reduction earphone of the present utility model is two unit sounding earphones, comprise moving-coil type phonation unit 3 and dynamic iron phonation unit 4, dynamic iron phonation unit 3 has outstanding high frequency performance, high-frequency cut-off frequency can be extended, supply the HFS of earphone, thus promote earphone tonequality.
Specifically, moving-coil type phonation unit comprises magnetic circuit system and vibrational system, wherein, vibrational system comprises vibrating diaphragm 31 and fixing voice coil loudspeaker voice coil bonding with vibrating diaphragm 31, when voice coil loudspeaker voice coil receives the signal of external circuit, the motion of the reciprocating cutting magnetic line of force can be done under the effect of electromagnetic field, thus drive vibrating diaphragm 31 to vibrate, the end (being specially the end of the second housing 12) of external shell 1 is provided with phonate hole 121, and vibrating diaphragm 31 vibrates the sound wave produced and is radiated to external environment condition by phonate hole 121.In the present embodiment, dynamic iron phonation unit 4 is placed in the side closer to phonate hole 121 of vibrating diaphragm 31, further, the passage of speaking of the operatic tunes before space between vibrating diaphragm 31 to phonate hole 121 is considered as moving-coil type phonation unit, so, dynamic iron phonation unit 4 be before being positioned at moving-coil type phonation unit 3 operatic tunes speak on passage, the design of this position relationship, the sound wave of dynamic iron phonation unit 4 can be made also directly can to enter people's ear by phonate hole 121, avoid the interference taking the design of other position relationships may bring high frequency performance.During concrete enforcement, moving-coil type phonation unit 3 can be worked by mode in parallel with dynamic iron phonation unit 4 simultaneously, or by adopting frequency dividing circuit to make the two carry out work respectively at different frequency range.
As previously mentioned, what be positioned at moving-coil type phonation unit 3 due to dynamic iron phonation unit 4 speaks on passage, it is readily understood that, dynamic iron phonation unit 4 needs to offer the sound-guiding structure (not shown) be interconnected with phonate hole 121, during concrete enforcement, sound-guiding structure can be through hole or other structures that sound wave can be made to pass through.
The technical program is while lifting earphone tonequality, in order to reach the effect of feed forward noise reduction, noise reduction MIC5 is also combined with in external shell 1 and the space of lid 2, (hole 21 that quiets down in present embodiment is designed to strip in hole 21 lid 2 to be provided with connection extraneous quieting down, during concrete enforcement, it can be other shape, does not specifically limit by this), concrete execution mode comprises following two kinds:
Embodiment one:
Consult shown in Fig. 1 and Fig. 2, one is preferred embodiment, conducting wire plate 6 is combined with in lid 2 and the space of external shell 1, noise reduction MIC5 is incorporated into the side of conducting wire plate 6 external shell 1 dorsad, that is, the compartition that external shell 1 and lid 2 are formed is two mutual disconnected cavitys, and the space between conducting wire plate 6 and lid 2 is noise reduction cavity 8, the space of external shell 1 is sounding cavity 7, and noise reduction MIC5 is positioned at noise reduction cavity 8.Different from feedback noise reduction, in feed forward noise reduction process, noise reduction is carried out in the outside that noise reduction MIC is positioned at earphone sounding cavity 8.
From foregoing description, the utility model provides a kind of structural design being two phonation unit earphone and carrying out feed forward noise reduction, in this embodiment, noise reduction MIC5 is connected with conducting wire plate 6, be equivalent to conducting wire plate 6 solder joint of MIC5 is transferred out, and conducting wire plate 6 is connected with Dolby circuit H, noise reduction MIC5 realizes feed forward noise reduction by conducting wire plate 6 in conjunction with Dolby circuit H.
Embodiment two:
Consult shown in Fig. 3 and Fig. 4, the another kind of execution mode of the technical program is, noise reduction MIC5 directly accesses in the Dolby circuit of feed forward noise reduction earphone, directly carries out feed forward noise reduction, and does not need by conjunction with this process of conducting wire plate 6.In the manner in which, as feed forward noise reduction, noise reduction MIC5 is still positioned at the space of external shell 1 and lid 2, and be namely still arranged in noise reduction cavity 8, its position remains unchanged, and does not just need in conjunction with this structure of conducting wire plate 6.
It should be noted that, for noise reduction, mostly existing feed forward noise reduction is to coordinate moving-coil loudspeaker, frequency response and the phase place of single moving-coil loudspeaker are all unanimously more stable, relatively be beneficial to cooperation Dolby circuit, anti-acoustic capability also realizes than being easier to, feed forward noise reduction earphone of the present utility model, owing to being provided with two phonation units simultaneously, can influence each other to a certain extent, the consistency finally showing as frequency response and phase place is deteriorated, more discrete, its anti-acoustic capability realizes more difficult, based on this factor, during enforcement, should more pay close attention to Design of Compatibility relevant therewith, such as design the wider circuit etc. of the scope of application, realize effective noise reduction of two unit sounding earphone.
Preferably, lid 2 is the decorative cover body for the protection of noise reduction MIC5.
Preferably, quiet down hole 21 for strip structure, in fact, the concrete shape in hole 21 of quieting down is not limited to illustrated strip, also can be other shapes, such as oval, circular, square etc., specifically do not limit, as long as its can with external environment connect, pickup external environment in noise.
These are only the utility model case study on implementation, be not limited to the utility model, as long as those of ordinary skill in the art modify or change according to the equivalence that the utility model institute disclosure is done, all should include in the protection range recorded in claims.
Claims (10)
1. a feed forward noise reduction earphone, comprises external shell; The front end of described external shell is provided with the lid matched with described external shell; Contain phonation unit in the space of described external shell, it is characterized in that: described phonation unit comprises moving-coil type phonation unit and dynamic iron phonation unit; Described moving-coil type phonation unit comprises vibrating diaphragm; The end of described external shell is provided with phonate hole; Described dynamic iron phonation unit is positioned at the side of the close described phonate hole of described vibrating diaphragm; Noise reduction MIC is combined with in the space that described external shell and described lid are formed; Described lid is provided with and is communicated with the extraneous hole that quiets down.
2. feed forward noise reduction earphone according to claim 1, is characterized in that: the second housing that described external shell comprises the first cylindric housing and combines with described first housing; Described moving-coil type phonation unit and described dynamic iron phonation unit are all contained in the inside cavity that described first housing and described second housing are formed.
3. feed forward noise reduction earphone according to claim 1, is characterized in that: be combined with conducting wire plate in the space of described lid and described external shell; Described noise reduction MIC is incorporated into the side of described conducting wire backboard to described external shell.
4. feed forward noise reduction earphone according to claim 3, is characterized in that: the compartition that described external shell and described lid are formed is two mutual disconnected cavitys; Space between described conducting wire plate and described lid is noise reduction cavity; The space of described external shell is sounding cavity; Described noise reduction MIC is positioned at described noise reduction cavity.
5. feed forward noise reduction earphone according to claim 4, is characterized in that: the Dolby circuit of described conducting wire plate and described feed forward noise reduction earphone is interconnected.
6. feed forward noise reduction earphone according to claim 1, is characterized in that: described noise reduction MIC directly accesses the Dolby circuit of described feed forward noise reduction earphone.
7. feed forward noise reduction earphone according to claim 2, is characterized in that: the end of described second housing is provided with phonate hole; Space between the vibrating diaphragm of described moving-coil type phonation unit and described second housing phonate hole forms the passage of speaking of the front operatic tunes; Before described dynamic iron phonation unit is positioned at described moving-coil type phonation unit, the operatic tunes speaks on passage.
8. feed forward noise reduction earphone according to claim 7, is characterized in that: described dynamic iron phonation unit offers the sound-guiding structure be interconnected with described phonate hole.
9. feed forward noise reduction earphone according to claim 1, is characterized in that: described lid is the decorative cover body for the protection of described noise reduction MIC.
10. feed forward noise reduction earphone according to claim 1, is characterized in that: described in the hole that quiets down be strip structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520797242.8U CN205039984U (en) | 2015-10-15 | 2015-10-15 | Feedforward NOISE -CANCELLING HEADPHONES |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520797242.8U CN205039984U (en) | 2015-10-15 | 2015-10-15 | Feedforward NOISE -CANCELLING HEADPHONES |
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| Publication Number | Publication Date |
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| CN205039984U true CN205039984U (en) | 2016-02-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201520797242.8U Active CN205039984U (en) | 2015-10-15 | 2015-10-15 | Feedforward NOISE -CANCELLING HEADPHONES |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106878878A (en) * | 2016-01-08 | 2017-06-20 | 陈淑君 | A kind of new acoustic attenuation device and its manufacture method |
| WO2021098014A1 (en) * | 2019-11-22 | 2021-05-27 | 歌尔股份有限公司 | Active noise reduction acoustic unit and sound-generating body |
-
2015
- 2015-10-15 CN CN201520797242.8U patent/CN205039984U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106878878A (en) * | 2016-01-08 | 2017-06-20 | 陈淑君 | A kind of new acoustic attenuation device and its manufacture method |
| WO2021098014A1 (en) * | 2019-11-22 | 2021-05-27 | 歌尔股份有限公司 | Active noise reduction acoustic unit and sound-generating body |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
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Address after: 261031 Dongfang Road, Weifang high tech Industrial Development Zone, Shandong, China, No. 268 Patentee after: Goertek Inc. Address before: 261031 Dongfang Road, Weifang high tech Industrial Development Zone, Shandong, China, No. 268 Patentee before: Goertek Inc. |