CN208540166U - A kind of interior single microphone remote pickup public address system - Google Patents

Abstract

It is disclosed by the utility model to belong to audio engineering and room acoustics technical field, specially a kind of indoor single microphone remote pickup public address system, including microphone, the output end of the audio collection module is electrically connected the input terminal of governor circuit plate module, the output end of the automatic growth control module is electrically connected the input terminal of active noise reduction and reverberation cancellation module, the output end that the output end of the active noise reduction and reverberation cancellation module is electrically connected acoustic feedback suppression module is electrically connected the input terminal of public address module, the output end of the public address module is electrically connected the input terminal of speaker, automatic growth control guarantees system sound pressure equalisation, avoid the occurrence of that sound is excessive to utter long and high-pitched sounds or the too small very unclear situation of sound, adaptive environment noise reduction removal ambient noise makes voice purer, improve the clarity of voice, adaptive feedback inhibition is promoted System amplify gain and inhibit utter long and high-pitched sounds.

Description

A kind of interior single microphone remote pickup public address system

Technical field

The utility model relates to audio engineering and room acoustics technical field, specially a kind of indoor single microphone is remote Pickup public address system.

Background technique

Amplifying indoors at present, be widely used is that gooseneck words and then are amplified using power amplifier pickup again.There are also a kind of sides Case is exactly to be amplified using the mobile public address set of " apis florea " etc.The both the above mode output gain that amplifies is big, still The necessary distance microphone of speaker is close, because the pickup distance generally only 3-5cm of this kind of microphone, leads to microphone in this way Constraint (for example must bow speak close to microphone, wear tie clip microphone etc) can be formed to speaker.Such system The high-gain amplifying effect of generation causes indoor acoustic pressure excessively high, and long-time service can damage the hearing of audience, leads to audience The problems such as absent minded.For this purpose, it is proposed that a kind of interior single microphone remote pickup public address system.

Utility model content

It is above-mentioned to solve the purpose of this utility model is to provide a kind of indoor single microphone remote pickup public address system The problem of being proposed in background technique.

To achieve the above object, the utility model provides the following technical solutions: a kind of interior single microphone remote pickup Public address system, including microphone, the output end of the microphone are electrically connected the input terminal of audio collection module, and the audio is adopted The output end for collecting module is electrically connected the input terminal of governor circuit plate module, and the output end of the governor circuit plate module is electric respectively Property connection automatic growth control module and bluetooth communication input terminal, the output end of the automatic growth control module is electrical Connect the input terminal of active noise reduction and reverberation cancellation module, the output end electric connection of the active noise reduction and reverberation cancellation module The output end of acoustic feedback suppression module is electrically connected the input terminal of public address module, and the output end of the public address module is electrically connected sound The input terminal of case, the input terminal of the bluetooth communication are electrically connected the input terminal of intelligent terminal, the intelligent terminal difference Two-way electric connection public address module, active noise reduction and reverberation cancellation module and automatic growth control module.

Preferably, the public address module is connected with volume control panel.

Preferably, the microphone is Electret Condencer Microphone.

Compared with prior art, the utility model has the beneficial effects that a kind of indoor single Mike that the utility model proposes Wind remote pickup public address system, zero constraint pickup mode, allows speaker to be free to mobile speech, can preferably carry out Interaction, which is promoted, lectures experience, and automatic growth control guarantees system sound pressure equalisation, avoids the occurrence of that sound is excessive to utter long and high-pitched sounds or sound mistake Small very unclear situation, adaptive environment noise reduction removal ambient noise makes voice purer, improves the clarity of voice, adaptive Amplifying for feedback inhibition lifting system is answered gain and to inhibit to utter long and high-pitched sounds, Bluetooth control mode installation personnel can be adjusted at a distance be System parameter, convenient position each indoors carry out system debug and audition, simplify the installation configuration flow of system.

Detailed description of the invention

Fig. 1 is the utility model principle block diagram.

Specific embodiment

The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work Every other embodiment obtained, fall within the protection scope of the utility model.

Referring to Fig. 1, the utility model provides a kind of technical solution: a kind of interior single microphone remote pickup amplifies and is System, including microphone, the output end of the microphone are electrically connected the input terminal of audio collection module, the audio collection module Output end be electrically connected the input terminal of governor circuit plate module, the output end of the governor circuit plate module is electrically connected The output end of the input terminal of automatic growth control module and bluetooth communication, the automatic growth control module is electrically connected master The output end of the input terminal of dynamic noise reduction and reverberation cancellation module, the active noise reduction and reverberation cancellation module is electrically connected acoustic feedback The output end of suppression module is electrically connected the input terminal of public address module, and the output end of the public address module is electrically connected the defeated of speaker Enter end, the input terminal of the bluetooth communication is electrically connected the input terminal of intelligent terminal, and the intelligent terminal distinguishes two-way electricity Property connection public address module, active noise reduction and reverberation cancellation module and automatic growth control module.

Wherein, the public address module is connected with volume control panel, and the microphone is Electret Condencer Microphone.

Working principle: in use, the microphone being directed toward using a cardioid, and it is suspended on the movable area of speaker speaker Domain, microphone are powered using 48V phantom power using Electret Condencer Microphone and are linked into public address module.

In order to realize microphone remote pickup, need for microphone to be fixed on liftoff 2.2 meters or so of position, microphone The acquisition of audio signal is realized with audio collection module, and is transmitted to governor circuit plate module, by automatic growth control module The quality for carrying out signal amplitude regulating guarantee pickup, making voice signal is not in occur uttering long and high-pitched sounds or volume because volume is excessive Too small the case where causing audience not hear, in order to achieve the purpose that remove indoor environment noise, the output of automatic growth control module Signal need to eliminate fan sound, air-conditioning sound, outdoor automobile tire grating, interior by active noise reduction and reverberation cancellation module The reverberation that metope reflects to form makes voice keep clear, occurs the acoustic feedback phenomenon uttered long and high-pitched sounds in order to prevent, active noise reduction module is defeated Signal out can be input to acoustic feedback suppression module, and acoustic feedback suppression module is uttered long and high-pitched sounds using digital signal processing algorithm automatic identification Frequency point simultaneously inhibits frequency point of uttering long and high-pitched sounds, so that the public address gain of system is improved, in order to reach the effect sound feedback processing of public address The signal of module output is connected to public address module, and public address module amplifies voice signal and then exported by speaker, in order to right Public address set is controlled, and the utility model is in such a way that volume control panel and intelligent terminal control combine, intelligence Terminal is mainly used for installation and debugging, and volume control panel mainly gives user's regular job to use.

In order to obtain better amplifying effect, the requires of the utility model uses directive property for 10 degree of intermediate frequency speaker, and It is mounted at indoor about 2/3rds, liftoff about 2 meters.

Bluetooth control is carried out to utility model device in order to realize, needs to install an application on intelligent terminal, applies It is communicated by the bluetooth communication on Bluetooth protocol and device, using control below capable of being carried out by bluetooth: adjusting Device output volume, regulating device ambient noise-reduction and reverberation eliminate parameter, control automatic gain module gain ranging and Save system configuration.

While there has been shown and described that the embodiments of the present invention, for the ordinary skill in the art, It is understood that these embodiments can be carried out with a variety of variations in the case where not departing from the principles of the present invention and spirit, repaired Change, replacement and variant, the scope of the utility model is defined by the appended claims and the equivalents thereof.

Claims (3)

1. a kind of interior single microphone remote pickup public address system, including microphone, it is characterised in that: the microphone it is defeated Outlet is electrically connected the input terminal of audio collection module, and the output end of the audio collection module is electrically connected governor circuit template die Automatic growth control module and Bluetooth communication mould is electrically connected in the output end of the input terminal of block, the governor circuit plate module The input terminal of block, the output end of the automatic growth control module are electrically connected the input of active noise reduction and reverberation cancellation module The output end that the output end of end, the active noise reduction and reverberation cancellation module is electrically connected acoustic feedback suppression module, which is electrically connected, to be expanded The input terminal of sound module, the output end of the public address module are electrically connected the input terminal of speaker, the bluetooth communication it is defeated Enter the input terminal that end is electrically connected intelligent terminal, the intelligent terminal distinguish two-way electric connection public address module, active noise reduction and Reverberation cancellation module and automatic growth control module.

2. a kind of indoor single microphone remote pickup public address system according to claim 1, it is characterised in that: the expansion Sound module is connected with volume control panel.

3. a kind of indoor single microphone remote pickup public address system according to claim 1, it is characterised in that: the wheat Gram wind is Electret Condencer Microphone.