CN204350245U

CN204350245U - A kind of frequency modulation filtering noise control bluetooth earphone

Info

Publication number: CN204350245U
Application number: CN201420683162.5U
Authority: CN
Inventors: 覃海洋
Original assignee: Individual
Current assignee: Individual
Priority date: 2014-11-13
Filing date: 2014-11-13
Publication date: 2015-05-20
Anticipated expiration: 2024-11-13

Abstract

The utility model discloses a kind of frequency modulation filtering noise control bluetooth earphone, relate to noise-proofing equipment technical field.Comprise sound acquisition module, sound filtration module, bluetooth processing module and sound output module, the voice signal of collection is sent to described sound filtration module and carries out being separated, amplifying process by described sound acquisition module, described sound filtration module sends the voice signal handled well to voice output module, and described bluetooth processing module sends the sound of mobile phone signal of collection to voice output module.The utility model is optionally by the voice signal filtering of the low sound intensity, the voice signal of high sound intensity is amplified, realize the object reducing noise, thus effective filter out noise part, amplify the voice of people around, be conducive to the generation reducing security incident, a relatively quietly operating environment can be provided to operating personnel, whether user can be reminded to have telephone access, the phenomenon can effectively avoiding the important phone of user to miss, facilitates its daily life simultaneously.

Description

A kind of frequency modulation filtering noise control bluetooth earphone

Technical field

The utility model relates to noise-proofing equipment technical field, particularly relates to a kind of frequency modulation filtering noise control bluetooth earphone.

Background technology

In noise complex environment, as on building site, in factory, airport etc., interchange between people is very difficult, the voice of people often flood by the roar of machine, between people, main exchange way passes through gesture exactly, but gesture easily produces and misreads, cause security incident, meanwhile, do not have again corresponding equipment that people can be helped to exchange in this environment, therefore serious potential safety hazard is brought, and long-term operation under this kind of high intensity noise environment, the physical and mental health of staff will be badly influenced, a kind of threat seriously to the life of people.

As everyone knows, noise has significant harmfulness to production and life, and the noise-proof earphone of commercial type and earplug principle of noise reduction are and stop indiscriminately or weaken sound transmission.In actual applications, there is this disadvantage in this series products, namely prevents the propagation of useful sound.In most of the cases, user wishes optionally noise reduction, such as at workshop, workman wishes to reduce machine roar, and the earphone that can exchange like a cork is again born.This earphone adopts the mode of electronic filtering to achieve optionally noise reduction.

Utility model content

Technical problem to be solved in the utility model there is provided one can frequency modulation filter out noise, again by the frequency modulation filtering noise control bluetooth earphone of Bluetooth of mobile phone call.

For solving the problems of the technologies described above, technical solution adopted in the utility model is: a kind of frequency modulation filtering noise control bluetooth earphone, comprise sound acquisition module, sound filtration module, bluetooth processing module and sound output module, the voice signal of collection is sent to described sound filtration module and carries out being separated, amplifying process by described sound acquisition module, described sound filtration module sends the voice signal handled well to voice output module, and described bluetooth processing module sends the sound of mobile phone signal of collection to voice output module.

Preferably, described sound acquisition module is microphone M, and voice output module is loud speaker B.

Preferably, described sound filtration module comprises AD converter IC1, filtering process chip IC2, D/A converter IC3, electric capacity C1, C2, C3, C4, C5, resistance R1, R2, triode VT and 9V power supply, described AD converter IC1 input is by electric capacity C1, C2 is connected with microphone M, its output is connected with the input of filtering process chip IC2, resistance R1 one end is connected with AD converter IC1, the other end is connected with 9V power cathode, the output of filtering process chip IC2 is connected with D/A converter IC3, and by electric capacity C3 grounding connection, the output of D/A converter IC3 is connected with the base stage of triode VT, and be connected with 9V positive source by electric capacity C4, be connected with 9V power cathode by resistance R4, the collector electrode of triode VT is connected with 9V positive source by loud speaker B, electric capacity C5 is attempted by triode VT emitter and loud speaker B two ends.

Preferably, described filtering process chip IC2 is ML26123 chip.

Adopt the beneficial effect that produces of technique scheme to be: the utility model by microphone noise and people spoken sound mixing sound together with gather; usual mechanical roar belongs in low frequency 20-100Hz; and the voice voice frequency of people is generally 500-3000Hz; so filter machine roar part by frequency-selecting filter; the sound of speaking of people is amplified simultaneously; by the voice output (being now substantially left people's voice part) after filtration, import in user's ear.Can also by the band mobile phone of bluetooth and this earphone interconnected, person easy to use can hear oneself telephone bandset the tinkle of bells like this, and make corresponding answer, its daily life convenient.The utility model is optionally by the voice signal filtering of the low sound intensity, the voice signal of high sound intensity is amplified, realize the object reducing noise, thus effective filter out noise part, amplify the voice of people around, be convenient to user and observe surrounding environment, be conducive to the generation reducing security incident, because noise section has been carried out filtering, so a relatively quietly operating environment can be provided to operating personnel, considerably reduce noise like this to the injury on its body and mind, user can be reminded whether to have telephone access simultaneously, effectively can avoid the phenomenon that the important phone of user is missed, facilitate its daily life, be particularly useful for building site machinery driver, factory work personnel, and the personnel of other operations under noisy environment.

Accompanying drawing explanation

Fig. 1 is the utility model principle schematic;

Fig. 2 is the utility model sound filtration module circuit diagram.

Embodiment

Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.

As shown in Figure 1, the utility model is a kind of frequency modulation filtering noise control bluetooth earphone, comprise sound acquisition module, sound filtration module, bluetooth processing module and sound output module, the voice signal of collection is sent to described sound filtration module and carries out being separated, amplifying process by described sound acquisition module, described sound filtration module sends the voice signal handled well to voice output module, and described bluetooth processing module sends the sound of mobile phone signal of collection to voice output module.

As shown in Figure 2, sound acquisition module described in the utility model is microphone M, and voice output module is loud speaker B, described sound filtration module comprises AD converter IC1, filtering process chip IC2, D/A converter IC3, electric capacity C1, C2, C3, C4, C5, resistance R1, R2, triode VT and 9V power supply, described AD converter IC1 input is by electric capacity C1, C2 is connected with microphone M, its output is connected with the input of filtering process chip IC2, resistance R1 one end is connected with AD converter IC1, the other end is connected with 9V power cathode, the output of filtering process chip IC2 is connected with D/A converter IC3, and by electric capacity C3 grounding connection, the output of D/A converter IC3 is connected with the base stage of triode VT, and be connected with 9V positive source by electric capacity C4, be connected with 9V power cathode by resistance R4, the collector electrode of triode VT is connected with 9V positive source by loud speaker B, electric capacity C5 is attempted by triode VT emitter and loud speaker B two ends, described filtering process chip IC2 is ML26123 chip.Described modulus AD converter is primarily of chip IC 1 and peripheral cell composition thereof, its input is by electric capacity C1, IC2 connects mini microphone lead-in wire, resistance R1 shields, the analog signal that microphone exports is converted to digital signal by AD converter, and input IC2, filter IC2 input is connected with IC output, IC2 is by C3 ground connection, the signal that loudness of a sound is less than setting range by IC2 is deleted, as different with the frequency of other noises in people and set different value ranges, such as 300Hz, 500Hz, the signal input IC3 that IC2 output will retain, IC3 is digital to analog converter, its peripheral cell has R2 and C4, the signal that IC2 exports is converted to analog signal by IC3, and be converted to voice signal clearly by triode VT and loud speaker B, auxiliary noise reduction electric capacity C5 is set outside B, described filter circuit by 9V in powered battery.

The utility model by microphone noise and people spoken sound mixing sound together with gather; usual mechanical roar belongs in low frequency 20-100Hz; and the voice voice frequency of people is generally 500-3000Hz; so filter machine roar part by frequency-selecting filter; the sound of speaking of people is amplified simultaneously; by the voice output (being now substantially left people's voice part) after filtration, import in user's ear.Can also by the band mobile phone of bluetooth and this earphone interconnected, person easy to use can hear oneself telephone bandset the tinkle of bells like this, and make corresponding answer, its daily life convenient.The utility model is optionally by the voice signal filtering of the low sound intensity, the voice signal of high sound intensity is amplified, realize the object reducing noise, thus effective filter out noise part, amplify the voice of people around, be convenient to user and observe surrounding environment, be conducive to the generation reducing security incident, because noise section has been carried out filtering, so a relatively quietly operating environment can be provided to operating personnel, considerably reduce noise like this to the injury on its body and mind, user can be reminded whether to have telephone access simultaneously, effectively can avoid the phenomenon that the important phone of user is missed, facilitate its daily life, be particularly useful for building site machinery driver, factory work personnel, and the personnel of other operations under noisy environment.

Claims

1. a frequency modulation filtering noise control bluetooth earphone, is characterized in that, comprise sound acquisition module, sound filtration module, bluetooth processing module and sound output module, the voice signal of collection is sent to described sound filtration module and is separated by described sound acquisition module, amplify process, described sound filtration module sends the voice signal handled well to voice output module, and described bluetooth processing module sends the sound of mobile phone signal of collection to voice output module, and described sound filtration module comprises AD converter IC1, filtering process chip IC2, D/A converter IC3, electric capacity C1, C2, C3, C4, C5, resistance R1, R2, triode VT and 9V power supply, described AD converter IC1 input is by electric capacity C1, C2 is connected with microphone M, its output is connected with the input of filtering process chip IC2, resistance R1 one end is connected with AD converter IC1, the other end is connected with 9V power cathode, the output of filtering process chip IC2 is connected with D/A converter IC3, and by electric capacity C3 grounding connection, the output of D/A converter IC3 is connected with the base stage of triode VT, and be connected with 9V positive source by electric capacity C4, be connected with 9V power cathode by resistance R4, the collector electrode of triode VT is connected with 9V positive source by loud speaker B, and electric capacity C5 is attempted by triode VT emitter and loud speaker B two ends, and described filtering process chip IC2 is ML26123 chip.

2. a kind of frequency modulation filtering noise control bluetooth earphone according to claim 1, it is characterized in that: described sound acquisition module is microphone M, voice output module is loud speaker B.