CN209949400U

CN209949400U - Pick-up noise reduction earphone mainboard

Info

Publication number: CN209949400U
Application number: CN201921159426.6U
Authority: CN
Inventors: 麦志宁
Original assignee: Guangzhou Shen Fire Technology Co Ltd
Current assignee: Guangzhou Shen Fire Technology Co Ltd
Priority date: 2019-07-23
Filing date: 2019-07-23
Publication date: 2020-01-14
Anticipated expiration: 2029-07-23

Abstract

The utility model discloses an earphone mainboard of making an uproar falls in pickup belongs to the earphone field, including the mainboard body, be equipped with VGA gain and filter module, AGC feedback adjustment module, back level adjustment volume module and the module of picking up of environmental sound on the mainboard body, the module of picking up of environmental sound is connected with VGA gain and filter module, and VGA gain and filter module and AGC feedback adjustment module are connected, and VGA gain and filter module output and back level adjustment volume module are connected. The utility model discloses can carry out gain or compression according to the limit of 82 decibel acoustic pressures, guarantee that the acoustic pressure rank that the human body was experienced is within 82 decibels. The environment sound can be effectively restored to an external sound source when the environment sound is picked up, distortion phenomenon is not caused, the direction of the sound can be effectively distinguished, and the authenticity of the picked sound is restored.

Description

Pick-up noise reduction earphone mainboard

Technical Field

The utility model relates to an earphone field specifically is a pickup noise reduction earphone mainboard.

Background

The noise reduction earphone is an earphone which reduces noise by using a certain method. At present, two noise reduction earphones are respectively: active noise reduction headphones and passive noise reduction headphones. When a person is exposed to sound in excess of 85 db, there is a possibility of hearing damage, and if the damage is not significant, hearing can be restored by resting. If the patient is exposed to strong noise for a long time, the hearing fatigue can not be recovered, and the auditory receptors of the inner ear are subjected to organic lesions for a long time to cause permanent hearing damage, namely noise deafness. Aiming at the strong noise environment above 82 decibels, the volume of the picked sound is controlled below 60 decibels through an AGC feedback technology, so that the human hearing is protected; when the external environment sound is below 82 decibels, the sound in the frequency range of 100 to 20KHz is subjected to gain amplification through a VGA gain technology, so that a user can quickly respond when receiving sound information; the volume of the picked-up sound is divided into 6 adjustable gears, so that different hearing sensitivities can be adapted.

At present, a circuit built by an analog electronic technology is adopted by a pickup noise reduction earphone in the market to pick up environmental sound to a certain extent, but the ambient sound is not processed in a specific frequency band and is not excessively attenuated, so that a distortion phenomenon exists when the environmental sound is picked up; a simple feedback loop is adopted on the noise reduction circuit, feedback delay time of a certain time exists, and the noise reduction protection system does not take effect in time to protect human auditory sense due to the delayed response of the feedback loop under the condition of large volume of external sound; the sound pressure level control of the sound pickup volume is less, and the requirements of different human auditory sense sensitivities cannot be met.

SUMMERY OF THE UTILITY MODEL

To current problem, the utility model aims to provide a pickup noise reduction earphone mainboard to solve the problem that proposes in the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme:

the utility model provides an earphone mainboard of making an uproar falls in pickup, includes the mainboard body, is equipped with VGA gain and filter module, AGC feedback adjustment module, the module of picking up of back level adjustment volume module and ambient sound on the mainboard body, and ambient sound's the module of picking up is connected with VGA gain and filter module, and VGA gain and filter module and AGC feedback adjustment module are connected, and VGA gain and filter module output and back level adjustment volume module are connected.

As a further aspect of the present invention: the ambient sound pickup module is connected with an external sound receiving microphone.

As a further aspect of the present invention: the rear-stage volume adjusting module is connected with an external loudspeaker player.

As a further aspect of the present invention: the ambient sound pickup module comprises a left sound channel and a right sound channel.

As a further aspect of the present invention: the main control module is respectively connected with the VGA gain and filtering module, the AGC feedback adjusting module, the rear-stage volume adjusting module and the ambient sound pickup module.

As a further aspect of the present invention: the main board body is also provided with a power module.

Compared with the prior art, the beneficial effects of the utility model are that: the utility model discloses can carry out gain or compression according to the limit of 82 decibel acoustic pressures, guarantee that the acoustic pressure rank that the human body was experienced is within 82 decibels. The environment sound can be effectively restored to an external sound source when the environment sound is picked up, distortion phenomenon is not caused, the direction of the sound can be effectively distinguished, and the authenticity of the picked sound is restored.

Drawings

Fig. 1 is a schematic structural diagram of a sound-picking noise-reducing earphone main board.

Fig. 2 is a schematic circuit connection diagram of a pickup module for picking up ambient sound, an AGC feedback adjustment module, and a post-stage volume adjustment module in the main board of the noise-reducing headphone.

Fig. 3 is a schematic diagram of circuit connection between a post-stage volume adjusting module and a speaker player in a main board of the sound pickup and noise reduction earphone.

In the figure: 1. the system comprises a receiving microphone, a VGA gain and filtering module, a AGC feedback adjusting module, a rear-stage volume adjusting module, a loudspeaker player, a picking module for 6 environmental sounds, and a mainboard body, wherein the receiving microphone is 2, the VGA gain and filtering module is 3, the AGC feedback adjusting module is 4, and the picking module for 6 environmental sounds is 5.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted", "provided", "connected" and "connected" are to be interpreted broadly, for example, as being either fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The first embodiment is as follows: referring to fig. 1-3, a sound pickup and noise reduction earphone main board comprises a main board body 7, a VGA gain and filter module 2, an AGC feedback adjustment module 3, a post-stage volume adjustment module 4 and an ambient sound pickup module 6 are arranged on the main board body 7, the ambient sound pickup module 6 includes a left sound channel and a right sound channel, the ambient sound pickup module 6 is connected with an external sound receiving microphone 1, the ambient sound pickup module 6 is connected with the VGA gain and filter module 2, the VGA gain and filter module 2 is connected with the AGC feedback adjustment module 3, an output end of the VGA gain and filter module 2 is connected with the post-stage volume adjustment module 4, and the post-stage volume adjustment module 4 is connected with an external speaker player 5.

The sound receiving microphone 1 picks up external environment sound, the sound is transmitted to the VGA gain and filtering module 2, then the sound is transmitted to the rear-stage volume adjusting module 4 for adjustment, and finally the sound is output to the loudspeaker player 5 for playing, and the rear-stage volume adjusting module 4 is divided into 6 levels of volume adjustment, so that the sound receiving microphone is suitable for different people.

The AGC feedback adjusting module 3 connected with the VGA gain and filter module 2 has an AGC feedback adjusting technology and a VGA sound pressure gain technology, the AGC feedback adjusting also has two modes of fast recovery and slow recovery to adapt to different scenes, the normal hearing of a human body can be ensured through filtering in a 100 ~ 20KHz frequency band without causing partial noise of the system, when the VGA gain and filter module 2 receives a sound source exceeding 82 decibels, the AGC feedback adjusting module 3 is started immediately to compress the sound to be below 60 decibels and finally output to the external loudspeaker player 5, and the sound pressure range heard by the human hearing sense is always kept below 82 decibels without losing tiny sound details.

The source of the left channel and the right channel to the environmental sound direction can be judged more accurately.

The main control module is arranged on the main board body 7 and is respectively connected with the VGA gain and filtering module 2, the AGC feedback adjusting module 3, the rear-stage volume adjusting module 4 and the ambient sound pickup module 6, so that the control is convenient.

When the environmental noise exceeds 82 decibels, the received sound is immediately compressed and then transmitted to the human auditory sense, the sound sounds like being suddenly cut off, and then the sound is slowly recovered to be normal; the sound is amplified and directly transmitted to human hearing, and the sound volume exceeds a preset value to carry out feedback adjustment, but when the feedback really works, high sound pressure is transmitted to human hearing sense organs, so that the protection of the human hearing is not ideal. The utility model discloses can carry out gain or compression according to the limit of 82 decibel acoustic pressures, guarantee that the acoustic pressure rank that the human body was experienced is within 82 decibels. The environment sound can be effectively restored to an external sound source when the environment sound is picked up, distortion phenomenon is not caused, the direction of the sound can be effectively distinguished, and the authenticity of the picked sound is restored.

Example two: on the basis of the first embodiment, the main board body 7 is further provided with a power supply module, the power supply module is adaptive to two No. 5 batteries, the voltage of the batteries is increased to the voltage required by the system to ensure normal starting, the low-power detection system is provided, and when the voltage of the batteries is 2.0V, the system can give an alarm.

The utility model is loaded in an earphone shell, when a person wears the pickup noise reduction earphone and is in a relatively quiet environment, the earphone picks up the environmental sound and amplifies the environmental sound, the VGA filtering technology is adopted to shield the noise brought by the sound amplification, and people can clearly hear fine sound at a distance or a nearby place, such as footstep sound and bird sound; when the knocking sound or the explosive sound transmitted from the outside exceeds the threshold value of 82 decibels, the AGC circuit immediately responds to the processing, compresses the sound to be lower than 60 decibels and then transmits the sound, and when the high sound pressure does not restore the normal volume level, the sound suddenly becomes small on the human body and then slowly restores the sound pickup effect.

It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims

1. The utility model provides a pick-up noise reduction earphone mainboard, including mainboard body (7), a serial communication port, be equipped with VGA gain and filter module (2) on mainboard body (7), AGC feedback adjustment module (3), pick up module (6) of back level adjustment volume module (4) and ambient sound, ambient sound's pick up module (6) and VGA gain and filter module (2) are connected, VGA gain and filter module (2) and AGC feedback adjustment module (3) are connected, VGA gain and filter module (2) output and back level adjustment volume module (4) are connected.

2. The main board of a sound-pickup and noise-reduction earphone according to claim 1, wherein the ambient sound pickup module (6) is connected to an external microphone (1).

3. The main board of a sound pickup and noise reduction earphone according to claim 1, wherein the rear-stage volume adjusting module (4) is connected with an external speaker player (5).

4. The main board of a pick-up and noise reduction earphone according to claim 2, wherein the pick-up module (6) of ambient sound comprises a left channel and a right channel.

5. The pickup and noise reduction earphone main board according to any one of claims 1 to 4, wherein a main control module is arranged on the main board body (7), and the main control module is respectively connected with the VGA gain and filtering module (2), the AGC feedback adjustment module (3), the post-stage volume adjustment module (4) and the ambient sound pickup module (6).

6. The main board of the earphone for picking up and reducing noise according to claim 5, wherein the main board body (7) is further provided with a power module.