CN210327960U

CN210327960U - Sound equipment power amplifier module based on automatic volume adjustment

Info

Publication number: CN210327960U
Application number: CN201921155106.3U
Authority: CN
Inventors: 李安平
Original assignee: Guangzhou Guangwo Electronic Technology Co ltd
Current assignee: Guangdong guangwo Intelligent Technology Co.,Ltd.
Priority date: 2019-07-23
Filing date: 2019-07-23
Publication date: 2020-04-14
Anticipated expiration: 2029-07-23

Abstract

The utility model discloses a stereo set power amplifier module based on automatic volume control, including the body, still decode the chip including installing the sampling adapter on the body and integrated DSP inside the body, DSP decodes the internal integration of chip and has high bass accommodate unit and output signal size accommodate unit. The utility model discloses, do an algorithm to the detection of miaow sound, with the sampling adapter, the signal of gathering detects the back through the chip, the feedback is decoded the chip and is automatic in inside the increase or the signal processing who reduces of an output signal, thereby realize the stereo set and with the automatic tuning output sound size that comes according to external environment, the effect that whole classmates can hear also can be reached equally to the sound even if very little sound is said when the teacher speaks, on the contrary, even if the teacher can not send very big sound auto-excitation to very close sound that the microphone was close to.

Description

Sound equipment power amplifier module based on automatic volume adjustment

Technical Field

The utility model relates to a stereo set technical field specifically is a stereo set power amplifier module based on automatic volume control.

Background

The existing sound power amplifier board modules are all fixed with maximum power, the output power is adjusted through a total volume potentiometer, some adjust the total volume through a remote controller to adjust the output power of the sound, the sound output power is controlled through adjusting the volume of a mobile phone in a Bluetooth state, the three modes are used in squares and common conferences, the sound of the sound is continuously adjusted along with the change of the surrounding environment, the potentiometer is mechanical and easy to break, if the remote controller is lost, the sound is not adjusted, the operation is more troublesome, more troublesome is that when a teacher speaks in standard teaching, if the remote controller is close to a sound box, the sound answered by the student can not be heard, sometimes the teacher needs to separate a remote speaker from a self-excitation point to prevent the sound, sometimes the sound of the sound needs to be manually adjusted to be reduced, and the speaking strength of different teachers is different, when a student goes to a classroom, the sound of the sound box is manually turned up or down, so that the teaching quality is influenced.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a stereo set power amplifier module based on automatic volume control possesses simple structure, convenient to use's advantage, has solved the problem of proposing in the background art.

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a stereo set power amplifier module based on automatic volume control, includes the body, still including installing the sampling adapter on the body and integrated DSP decoding chip inside the body, DSP decoding chip's internal integration has high bass accommodate unit and output signal size regulating unit.

Preferably, a CD2399 common microphone processing chip is further integrated inside the body.

Preferably, the sampling sound pick-up is internally provided with an audio signal detection function.

Compared with the prior art, the beneficial effects of the utility model are as follows:

1. the utility model discloses, adopt built-in DSP to decode the chip, handle the chip integration to the ordinary microphone of CD2399 in inside, to the high bass accommodate unit of volume, output signal size regulating unit also integrated in DSP decodes chip the inside, will save 100 resistance-capacitance than traditional power amplifier board.

2. The voice self-help desk has the advantages that the voice self-help desk is provided with external sound environment detection, the power output of the sound can be automatically adjusted, the effect that all students can hear even if a teacher speaks a small sound in class can be achieved, and conversely, the voice self-excitation can not be generated even if the teacher leans close to the microphone.

Drawings

Fig. 1 is a schematic structural view of the utility model.

In the figure: 1-body.

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.

Referring to fig. 1, the present invention provides a technical solution: a kind of power amplifier module of sound based on automatic volume control, including the body 1, also include the sampling pickup mounted on body 1 and integrated DSP decoding chip in the body 1 inside, DSP decoding chip inside integrate have high bass regulating unit and output signal size regulating unit, except that the body 1 inside also integrates CD2399 ordinary microphone to process the chip in addition, need save 100 resistance capacitors than the traditional power amplifier board, upgrade one step from the material of the product at first, have reduced the manufacturing cost; meanwhile, the sampling pickup is internally provided with an audio signal detection function, specifically, an algorithm is performed on the detection of the microphone, the sampling pickup is fed back to a DSP decoding chip after the acquired signal is detected by a chip, and the signal processing for increasing or decreasing the output signal is automatically performed inside the DSP decoding chip, so that the sound is automatically tuned according to the external environment to output the sound, the effect that a student can hear all the students even if the teacher speaks a small sound can be achieved, and on the contrary, the teacher can not make a large sound self-excited even if the teacher leans on the microphone to make a close sound.

The working principle is as follows: this stereo set power amplifier module based on automatic volume control uses, the chip is decoded for DSP to the signal of adapter collection intermediate frequency channel, when the adapter detects the signal weakening of voice, DSP decodes that chip inside has an operation to put the output signal grow, make the stereo set reach the output size of setting for, when the adapter detects the signal grow of voice, DSP decodes the inside calculation of chip and diminishes output signal is automatic, make the sound of stereo set output diminish automatically, just so let the unchangeable mode of size of sound output when speaking voice, let teaching quality and effect obviously promote.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a stereo set power amplifier module based on automatic volume control, includes body (1), its characterized in that: the digital signal processor is characterized by further comprising a sampling pickup arranged on the body (1) and a DSP decoding chip integrated in the body (1), wherein a high-low tone adjusting unit and an output signal size adjusting unit are integrated in the DSP decoding chip.

2. The sound power amplifier module based on automatic volume adjustment of claim 1, characterized in that: the inside of body (1) still is integrated with the ordinary microphone of CD2399 and handles the chip.

3. The sound power amplifier module based on automatic volume adjustment of claim 1, characterized in that: the sampling pickup is internally provided with an audio signal detection function.