CN202979236U - Bluetooth function noise reduction headphone - Google Patents
Bluetooth function noise reduction headphone Download PDFInfo
- Publication number
- CN202979236U CN202979236U CN 201220576884 CN201220576884U CN202979236U CN 202979236 U CN202979236 U CN 202979236U CN 201220576884 CN201220576884 CN 201220576884 CN 201220576884 U CN201220576884 U CN 201220576884U CN 202979236 U CN202979236 U CN 202979236U
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- noise reduction
- music
- bluetooth
- frequency
- bluetooth function
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Abstract
The utility model discloses a Bluetooth function noise reduction headphone. The Bluetooth function noise reduction headphone comprises a Bluetooth receiving circuit board which is arranged in the headphone and a noise reduction processing chip, wherein the noise reduction processing chip is connected with the Bluetooth receiving circuit board, is used for analyzing DSP processing, sending out inverse audio offset noise, compensating corresponding phase and restoring sound effect, and is connected with a player. Due to the fact that only music with the frequency of 1kz can be received through Bluetooth transmission, music higher than 1kz is limited and the music frequency is reduced. Due to the fact that the CD music frequency is 1.5kz, the frequency is reduced after Bluetooth transmission. After the noise reduction processing chip receives music with the frequency of 1kz, the music frequency is restored to 1.5kz CD music, thus the CD music is played without damage. The Bluetooth function noise reduction headphone provided by the utility model has the advantages of simple structure and reasonable design, can be used by a user in different environments without being affected by background noise, and can bring many conveniences to people.
Description
Technical field
The utility model relates to a kind of Bluetooth function noise cancelling headphone.
Background technology
In voice applications, earphone is the most portable the most common output equipment, and the portable applied environment of earphone has determined the complexity of its background, wherein is no lack of abominable background noise is arranged.Present earphone noise-reduction method is all that audion terminal is delivered in paraphase after the background noise sampling, produces acoustical signal close with the background noise amplitude, single spin-echo, both offset, thereby reach the purpose of noise reduction, this framework noise reduction is better, but complex structure realizes that cost is also higher; And existing because Bluetooth transmission can only receive the music that frequency is 1kz, will be limited and reduce music frequency higher than the music of the music of 1kz, because the frequency of CD music is 1.5kz, so all can reduce frequency through after Bluetooth transmission, former music is produced destroy.
Summary of the invention
The technical problems to be solved in the utility model is to provide a kind of when Bluetooth transmission, the Bluetooth function noise cancelling headphone of the frequency of reducible CD music.
For addressing the above problem, the utility model adopts following technical scheme: a kind of Bluetooth function noise cancelling headphone, comprise the bluetooth circuit board for receiving that is arranged in earphone, and the DSP that be used for to analyze that is connected with the bluetooth circuit board for receiving processes, sends anti-phase audio frequency offset noise, compensates respective phase and reduce the noise reduction process chip of audio, and described noise reduction process chip is connected with player.
As preferably, described noise reduction process chip is connected with for the sound collector that gathers extraneous background noise.
As preferably, be respectively equipped with in described noise reduction process chip for the analog electrical signal that sound collector is produced and convert the A/D translation circuit of anti-phase noisy digit level signal output to and be used for system is exported the signal of telecommunication of playback and the adder that anti-phase noisy digit level signal is carried out add operation, and be used for converting the digital signal of adder output to D/A translation circuit that analog electrical signal is exported.
As preferably, described sound collector is placed on the connecting line of earphone external jack.
As preferably, described adder signal of telecommunication access port is connected with digital raising frequency circuit and digital low-pass filtering circuit in turn.
The beneficial effect of the utility model Bluetooth function noise cancelling headphone is: by adopting technique scheme, because Bluetooth transmission can only receive the music that frequency is 1kz, will be limited and reduce music frequency higher than the music of 1kz, and the frequency of CD music is 1.5kz, so all can reduce frequency through after Bluetooth transmission, the noise reduction process chip is reduced to music frequency the CD music of 1.5kz after receiving the music that frequency is 1kz, make the harmless broadcast of CD music.It is simple in structure, and is reasonable in design, and the user uses under different environment and is not subjected to the impact of background noise, can bring many convenience to people.
Description of drawings
Fig. 1 is the Bluetooth function principle of noise reduction figure of the utility model Bluetooth function noise cancelling headphone;
Fig. 2 is the noise reduction process schematic diagram of the utility model Bluetooth function noise cancelling headphone.
Embodiment
See also illustrated in figures 1 and 2, a kind of Bluetooth function noise cancelling headphone of the present utility model, comprise the bluetooth circuit board for receiving that is arranged in earphone, and the DSP that be used for to analyze that is connected with the bluetooth circuit board for receiving processes, sends anti-phase audio frequency offset noise, compensates respective phase and reduce the noise reduction process chip of audio, and described noise reduction process chip is connected with player.
Described noise reduction process chip is connected with for the sound collector that gathers extraneous background noise.
Be respectively equipped with in described noise reduction process chip for the analog electrical signal that sound collector is produced and convert the A/D translation circuit of anti-phase noisy digit level signal output to and be used for system is exported the signal of telecommunication of playback and the adder that anti-phase noisy digit level signal is carried out add operation, and be used for converting the digital signal of adder output to D/A translation circuit that analog electrical signal is exported.
Described sound collector is placed on the connecting line of earphone external jack.
Described adder signal of telecommunication access port is connected with digital raising frequency circuit and digital low-pass filtering circuit in turn.
The beneficial effect of the utility model Bluetooth function noise cancelling headphone is: by adopting technique scheme, because Bluetooth transmission can only receive the music that frequency is 1kz, will be limited and reduce music frequency higher than the music of 1kz, and the frequency of CD music is 1.5kz, so all can reduce frequency through after Bluetooth transmission, the noise reduction process chip is reduced to music frequency the CD music of 1.5kz after receiving the music that frequency is 1kz, make the harmless broadcast of CD music.It is simple in structure, and is reasonable in design, and the user uses under different environment and is not subjected to the impact of background noise, can bring many convenience to people.
The above be only embodiment of the present utility model, but protection range of the present utility model is not limited to this, and any variation or replacement of expecting without creative work is within all should being encompassed in protection range of the present utility model.Therefore, protection range of the present utility model should be as the criterion with the protection range that claims were limited.
Claims (5)
1. Bluetooth function noise cancelling headphone, it is characterized in that: comprise the bluetooth circuit board for receiving that is arranged in earphone, and the DSP that be used for to analyze that is connected with the bluetooth circuit board for receiving processes, sends anti-phase audio frequency offset noise, compensates respective phase and reduce the noise reduction process chip of audio, and described noise reduction process chip is connected with player.
2. will remove 1 described Bluetooth function noise cancelling headphone according to right, it is characterized in that: described noise reduction process chip is connected with for the sound collector that gathers extraneous background noise.
3. Bluetooth function noise cancelling headphone according to claim 1, it is characterized in that: be respectively equipped with in described noise reduction process chip for the analog electrical signal that sound collector is produced and convert the A/D translation circuit of anti-phase noisy digit level signal output to and be used for system is exported the signal of telecommunication of playback and the adder that anti-phase noisy digit level signal is carried out add operation, and be used for converting the digital signal of adder output to D/A translation circuit that analog electrical signal is exported.
4. Bluetooth function noise cancelling headphone according to claim 2, it is characterized in that: described sound collector is placed on the connecting line of earphone external jack.
5. Bluetooth function noise cancelling headphone according to claim 3, it is characterized in that: described adder signal of telecommunication access port is connected with digital raising frequency circuit and digital low-pass filtering circuit in turn.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220576884 CN202979236U (en) | 2012-11-05 | 2012-11-05 | Bluetooth function noise reduction headphone |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220576884 CN202979236U (en) | 2012-11-05 | 2012-11-05 | Bluetooth function noise reduction headphone |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202979236U true CN202979236U (en) | 2013-06-05 |
Family
ID=48520252
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220576884 Expired - Fee Related CN202979236U (en) | 2012-11-05 | 2012-11-05 | Bluetooth function noise reduction headphone |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202979236U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020048294A1 (en) * | 2018-09-07 | 2020-03-12 | 中兴通讯股份有限公司 | Noise cancelling method, apparatus, device, and storage medium |
-
2012
- 2012-11-05 CN CN 201220576884 patent/CN202979236U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020048294A1 (en) * | 2018-09-07 | 2020-03-12 | 中兴通讯股份有限公司 | Noise cancelling method, apparatus, device, and storage medium |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130605 Termination date: 20131105 |