CN2618394Y - Mating noise reduction apparatus and earphone for cabin seat - Google Patents
Mating noise reduction apparatus and earphone for cabin seat Download PDFInfo
- Publication number
- CN2618394Y CN2618394Y CN 03222710 CN03222710U CN2618394Y CN 2618394 Y CN2618394 Y CN 2618394Y CN 03222710 CN03222710 CN 03222710 CN 03222710 U CN03222710 U CN 03222710U CN 2618394 Y CN2618394 Y CN 2618394Y
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- CN
- China
- Prior art keywords
- compensation amplifier
- phase
- earphone
- circuit board
- printed circuit
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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 - Fee Related
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- Soundproofing, Sound Blocking, And Sound Damping (AREA)
- Fittings On The Vehicle Exterior For Carrying Loads, And Devices For Holding Or Mounting Articles (AREA)
Abstract
The utility model relates to an amortization device and a headphone, belonging to the headphone technical filed, in particular to what is complementally used in cockpits of traffic conveyances. The utility model adopts the technical proposals that the device comprises a headphone body, as well as a microphone and a loudspeaker both arranged on the headphone body. A printed circuit board is arranged for supporting the amortization circuit in the cockpit of traffic conveyance. The printed circuit board is composed of a gain compensation amplifier, a phase compensation amplifier, a filter and a phase-reversed driver; wherein, the microphone is connected with the gain compensation amplifier, and the gain compensation amplifier is connected with the phase compensation amplifier; meanwhile, the phase compensation amplifier is connected with the phase-reversed driver, and the output of the phase-reversed driver is connected with the loudspeaker. After adopting such constitution, the loudspeaker can be powered by the phase-reversed driver to sound a reversed noise, in which the amplitude comes close to that of the external sound wave of noise except for a contrary phase; therefore, such two sound waves can be counteracted and the elimination of noise is realized.
Description
Technical field:
The utility model relates to the earphone technical field, refers in particular to a kind of and interior matching used muffling device of passenger cabin of transport facility and earphone.
Background technology:
Along with improving constantly of social economy's level, people's weather also improves constantly, make people more and more higher to the requirement of the vehicles of going out to take, from the automobile to the train, again to aircraft, the speed of the vehicles that people take advantage of is more and more faster, and it has shortened the time that is used in the traffic that spends in people's journey process greatly.But but there is a common shortcoming in these vehicles when providing quick speed to us, promptly the noise that is produced is too big, have influenced people's rest during the journey.Though people are devoted to eliminate the noise that these vehicles bring to the passenger always, effect is undesirable always.The initial noise resistance earphone that occurs on the market is to utilize physical structure to finish the function of sound insulation, and when the user was with earphone, the ear curtain was kept apart noise and human body ear that the external world produces, thereby reduces the noise that the user hears.But the volume of this earphone is bigger, and when using in order to reach the effect of isolating fully, the chucking power of earphone is too big, thereby causes the user to wear uncomfortable and produce sultry sensation.And another aspect, this earphone abates the noise because of adopting physical structure, and it can't be isolated noise fully, still has the part noise and enters in the earphone and heard that by the user effect of its sound insulation still is undesirable.Comparatively desirable noise reduction earphone is a characteristic of utilizing sound wave at present, but produce a kind of sound wave of offset noise, but this earphone is owing to need fitting printed circuit board, so just has to increase the volume and the weight of earphone, thereby feels uncomfortable when causing the user to wear.
Summary of the invention:
The purpose of this utility model is to provide matching used muffling device of passenger cabin and earphone in a kind of simple in structure and with low cost and the transport facility.
The utility model is achieved by the following technical solution: it comprises headset main body and is arranged on headset main body interior microphone, loudspeaker, it also comprises the supporting body printed circuit board (PCB) that is arranged on the muffling circuit in the transport facility passenger cabin, this printed circuit board (PCB) comprises gain compensation amplifier, phase compensation amplifier, filter and rp-drive, microphone is connected with gain amplifier, gain amplifier is connected with the phase compensation amplifier, and the phase compensation amplifier is connected with rp-drive by filter, and the output of rp-drive is connected with loudspeaker.
After adopting this structure, drive loudspeaker by rp-drive and send the antinoise ripple, the wave amplitude of the wave amplitude of this antinoise ripple and external noise sound wave is close, and phase place is opposite, and this just makes two strands of sound waves cancel out each other, thereby reaches the effect that abates the noise.The utility model also has the following advantages:
1, earphone of the present utility model and printed circuit board (PCB) (being muffling circuit) are separated, and printed circuit board (PCB) are arranged in the passenger cabin of transport facility, make earphone weight saving, volume-diminished like this, and it is more comfortable that the user is worn.
2, since printed circuit board (PCB) and earphone branch be arranged, like this when earphone because during careless damage, the earphone that equipment purchase person need only buy identical function once more gets final product, and does not need to buy again entire equipment, so just can reduce the consumption of equipment purchase person's fund.
3, same because printed circuit board (PCB) and earphone branch are arranged, and equipment purchase person can select the various earphones of different styles as required like this, as long as its function is identical.
Description of drawings:
Below in conjunction with accompanying drawing the utility model is further described:
Fig. 1 is a circuit block diagram of the present utility model;
Fig. 2 is the oscillogram of the utility model operation principle;
Fig. 3 is this use new-type circuit figure;
Fig. 4 is that this uses novel execution mode circuit diagram.
Embodiment:
See accompanying drawing 1,3,4, the utility model comprises: headset main body 1 and the supporting body printed circuit board (PCB) 4 that is arranged on the muffling circuit in the transport facility passenger cabin, the wherein microphone 2 that is provided with in the headset main body 1, loudspeaker 3, printed circuit board (PCB) 4 comprises gain compensation amplifier 41, phase compensation amplifier 42, filter 43 and rp-drive 44.Microphone 2 is connected with gain amplifier 41, and gain amplifier 41 is connected with phase compensation amplifier 42, is connected with rp-drive 44 and phase compensation amplifier 42 has passed through filter 43, and the output of rp-drive 44 is connected with loudspeaker 3.
When mounted, headset main body 1 is an independent part, and printed circuit board (PCB) 4 is installed in the passenger cabin of transport facility, and transport facility described here mainly refers to: popular traffic transporting facilities such as aircraft, train, automobile.Wherein can be connected with the socket connected mode by plug between headset main body 1 and the printed circuit board (PCB) 4, its concrete mode is as follows: the microphone 2 in the headset main body 1 is connected with plug base pin by lead with loudspeaker 3, the input of the gain compensation amplifier 41 on the printed circuit board (PCB) 4 then links to each other with socket by lead with the output of rp-drive 44, only need so in use and will can use in the plug insertion socket, get final product otherwise plug extracted.
When this equipment is in running order, the microphone 2 that is arranged in the headset main body 1 will receive external noise, and noise is converted into the gain compensation amplifier 41 that transfers to behind the emulation signal of telecommunication on the printed circuit board (PCB) 4, the emulation signal of telecommunication after providing gain compensation through gain compensation amplifier 41 amplifies signal, signal after the amplification provides phase compensation through phase compensation amplifier 42 again, then filter 43 carries out the frequency band selection, drive loudspeaker by antiphase driver 44 at last and send anti-noise sound wave 6, sound wave 6 is close with the wave amplitude of former noise sound wave 5, and phase place is opposite, therefore two bursts of sound wave major parts will be cancelled out each other in the ear curtain of headset main body, thereby reduced the noise of ear institute uppick, seen accompanying drawing 2.And the sound wave 8 of the remaining noise that is not cancelled will be received by microphone 2 once more, once more through being cancelled again behind the gain compensation, so circulation is until with most noise eliminating, make user's ear not receive external noise, give an one quiet world.
Because headset main body 1 of the present utility model is separated with printed circuit board (PCB) 4, it is arranged on printed circuit board (PCB) 4 in the transport facility passenger cabin, makes earphone weight saving, volume-diminished like this, and it is more comfortable that the user is worn.Equipment purchase person can select the various earphones and the printed circuit board (PCB) of different styles to be used according to demand simultaneously, can satisfy the hobby of different users to different earphones like this.
Claims (2)
1, special-purpose assorted formula muffling device of passenger cabin chair and earphone, comprise: headset main body (1) and be arranged on microphone (2) in the headset main body (1), loudspeaker (3), it also comprises the supporting body printed circuit board (PCB) (4) that is arranged on the muffling circuit in the transport facility passenger cabin, this printed circuit board (PCB) (4) comprises gain compensation amplifier (41), phase compensation amplifier (42), filter (43) and rp-drive (44), it is characterized in that: microphone (2) is connected with gain amplifier (41), gain amplifier (41) is connected with phase compensation amplifier (42), and phase compensation amplifier (42) is connected with rp-drive (44) by filter (43), and the output of rp-drive (44) is connected with loudspeaker (3).
2, special-purpose assorted formula muffling device of passenger cabin chair according to claim 1 and earphone, it is characterized in that: the microphone (2) that is installed in the headset main body (1) is connected with a plug base pin by lead with loudspeaker (3), the input of the gain compensation amplifier (41) on the printed circuit board (PCB) (4) then links to each other with a socket by lead with the output of rp-drive (44), and plug and socket are pegged graft mutually.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03222710 CN2618394Y (en) | 2003-01-03 | 2003-01-03 | Mating noise reduction apparatus and earphone for cabin seat |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03222710 CN2618394Y (en) | 2003-01-03 | 2003-01-03 | Mating noise reduction apparatus and earphone for cabin seat |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2618394Y true CN2618394Y (en) | 2004-05-26 |
Family
ID=34245378
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03222710 Expired - Fee Related CN2618394Y (en) | 2003-01-03 | 2003-01-03 | Mating noise reduction apparatus and earphone for cabin seat |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2618394Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011079722A1 (en) * | 2009-12-31 | 2011-07-07 | 歌尔声学股份有限公司 | Nonenveloped earplug type earphone, device and method for enhancing sound at its earpiece |
| CN101304621B (en) * | 2007-04-19 | 2012-01-04 | 索尼株式会社 | Noise reducing apparatus and audio regeneration apparatus |
| CN101903941B (en) * | 2007-12-21 | 2012-09-19 | 沃福森微电子股份有限公司 | Noise cancellation system with lower rate emulation |
| CN111785240A (en) * | 2020-08-03 | 2020-10-16 | 上海全景医学影像诊断中心有限公司 | Anti-phase interference filter active wave protection device for PET-MR working noise |
-
2003
- 2003-01-03 CN CN 03222710 patent/CN2618394Y/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101304621B (en) * | 2007-04-19 | 2012-01-04 | 索尼株式会社 | Noise reducing apparatus and audio regeneration apparatus |
| CN101903941B (en) * | 2007-12-21 | 2012-09-19 | 沃福森微电子股份有限公司 | Noise cancellation system with lower rate emulation |
| CN102881281A (en) * | 2007-12-21 | 2013-01-16 | 沃福森微电子股份有限公司 | Noise cancellation system with lower rate emulation |
| CN102881281B (en) * | 2007-12-21 | 2015-04-08 | 沃福森微电子股份有限公司 | Noise cancellation system with lower rate emulation |
| CN104751839A (en) * | 2007-12-21 | 2015-07-01 | 沃福森微电子股份有限公司 | Noise Cancellation System With Lower Rate Emulation |
| CN104751839B (en) * | 2007-12-21 | 2019-02-19 | 思睿逻辑国际半导体有限公司 | Noise canceling system with lower rate emulation |
| US10431198B2 (en) | 2007-12-21 | 2019-10-01 | Cirrus Logic, Inc. | Noise cancellation system with lower rate emulation |
| WO2011079722A1 (en) * | 2009-12-31 | 2011-07-07 | 歌尔声学股份有限公司 | Nonenveloped earplug type earphone, device and method for enhancing sound at its earpiece |
| CN111785240A (en) * | 2020-08-03 | 2020-10-16 | 上海全景医学影像诊断中心有限公司 | Anti-phase interference filter active wave protection device for PET-MR working noise |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |