20 results about "Public address system" patented technology

1. The name of the design product: intelligent broadcast server host (MTX1-ES). 2. The use of the design product: used for providing resource storage, audio signal distribution, partition control, responsible for program library management, task management, terminal management, recording management, user management, permission management, various task management schemes and other remote services for public broadcasting system, fire emergency broadcasting. 3. The design points of the design product: in shape. 4. The picture or photo that best indicates the design points: perspective view 1.

To reliably amplify sound in an object area.SOLUTION: A sound amplification method for amplifying sound in an object area includes the steps of: monitoring a state of a sound amplification facility 2 installed in the object area A; moving a mobile loudspeaker 6 to an arrangement position of the sound amplification facility 2 in an abnormal state when the state of the sound amplification facility 2 is in the abnormal state without an ability to perform normal sound amplification; and allowing the mobile loudspeaker 6 to amplify the sound in place of the sound amplification facility 2 in the abnormal state.SELECTED DRAWING: Figure 6

To provide a device for real time dissemination of information or water level status to the community wherein they are at the forefront of the impending disaster. A portable water level monitoring device (1) comprising: a 10 microcontroller (11) connected to a MP3 module (12) with a memory card (12a); a plurality of sensors (13) connected to the microcontroller (11); a public address system (15) connected to the microcontroller (11) ;a broadcast address system (14) connected to the microcontroller (11); a power source system (16) connected to the microcontroller (11) and the plurality of sensors (13); wherein the microcontroller (11) 15 programmed the sensors (13) to collect data and transmit a water level to the public address system (15) and broadcast address system (14). A listening station configured to receive the collected data transmitted.

The application provides a method and system for visual monitoring of emergency conference system equipment operation, audio signals at multiple positions in a target conference room are collected; a mixed signal formed by the audio signals is retrieved, the mixed signal is separated into multiple audio channels to form a matrix; a buffer area is set for each audio channel; the order of audio data input and output is controlled, left and right channel audio data of each channel is stored in a corresponding slave buffer area, and the slave buffer area is recalled to a master buffer area; volume size analysis, echo detection, howling detection and bottom noise detection are performed on audio data of the master buffer area; and audio quality abnormal conditions are recorded and displayed. The application realizes detection of the running state of an audio processor and a public address system, facilitates monitoring of the running state of equipment by operation and maintenance personnel, and improves operation and maintenance efficiency.

This utility model relates to the field of pole attachment devices, and more particularly to a pole attachment device for automatically adjusting the direction of a speaker column installation. It includes an annular clamp, a connecting shaft, a speaker column mounting frame, and a drive unit. The annular clamp is a ring-shaped structure fitted onto the pole. The speaker column mounting frame is mounted on the speaker column. One end of the connecting shaft is movably connected to the annular clamp via the drive unit, and the other end is fixedly connected to the speaker column mounting frame. This utility model is particularly suitable for public address systems requiring dynamic adjustment of sound field coverage, as well as flood control and flood warning systems and smart construction site management scenarios. It provides a remotely controllable, automatically adjustable speaker column installation device to improve installation flexibility and management efficiency. It features structural stability, precise orientation, remote control, and strong compatibility. This utility model solves the technical problems of existing fixed speaker columns that cannot be dynamically adjusted after installation, resulting in low efficiency and poor safety of manual adjustment.

We provide the system. [Solution] A data processing means that receives video information from a monitoring system and analyzes the video information to detect abnormal behavior, Information generation means that generates a warning message based on abnormal behavior detected by the data processing means, A signal output means for outputting the warning message, Information communication means for notifying a management information terminal of the results of detecting the abnormal behavior, A sound generation means that generates an audio signal using the warning message and outputs it to a public address system in real time, A system that includes this.

This invention discloses a portable subway fire suppression system (FAS) and gas extinguishing system simulation training device, comprising a base with a simulation panel fixed to the top. The panel integrates a fire alarm simulation device, a fire extinguishing control simulation device, a gas extinguishing device, and a ventilation simulation device. The fire alarm simulation device simulates various alarms via alarm lights fixed to the panel. The fire extinguishing control simulation device includes gas extinguishing control and section control devices. The ventilation simulation device includes an exhaust fan, a gas valve, and corresponding status lights. Furthermore, the gas extinguishing device is bolted to the ground. The simulation panel also integrates a suction detector and an auxiliary simulation device. The base has a support bracket and casters. A power supply is located on the back of the panel. The auxiliary simulation device can simulate subway fire pumps, access control systems, and public address system status indicators. This invention is easy to move and provides comprehensive simulation training, improving trainees' learning efficiency.

The application provides a kind of loudspeaker online monitoring system and public broadcast system, the system includes: host computer, detection control device, power amplifier, and the detection terminal of matching setting with loudspeaker;The first end of detection control device is connected with the input end of power amplifier;The second end of detection control device and the output end of power amplifier are connected with the input end of each detection terminal;Detection control device is used to mix audio signal with ultrasonic signal, and sends mixed signal to power amplifier;Power amplifier is used to amplify the mixed signal received, and sends mixed amplified signal to each detection terminal;Detection terminal is used to sample power amplifier circuit and loudspeaker loop, when power amplifier circuit sampling voltage and loudspeaker loop sampling current include ultrasonic data and ultrasonic data is within the preset voltage range, it is determined that power amplifier circuit and loudspeaker loop work normally;The application can realize one-to-one detection of loudspeaker while improving the detection accuracy of loudspeaker working state.

A hybrid in-person and remote audiovisual conference broadcasting system provides a centrally controlled system for managing and broadcasting the audiovisual data collected from mobile devices both in humanly perceptible proximity of an in-person public-address system and beyond humanly perceptible proximity to the in-person public-address system. In an exemplary embodiment, a moderator controls requests from various participant members to broadcast audio or video from their personal mobile device to the other group members. Some members may be in proximity to an in-person public address system where they may for example be able to hear amplified audio and see live projected or otherwise presented video. In this exemplary embodiment, remote users not in proximity to the in-person public address system may also participate by for example listening to and viewing the broadcast audiovisual data on their personal mobile devices. Both in-person / local users and remote users may request to be selected for broadcasting to all users.

A gaming machine, public address system, and gaming system are provided with a public address system integrated into the gaming machines to use the gaming machine speakers for public address audio. The public address system includes a microphone amplifier adapted for coupling to a microphone and producing a first audio signal. An audio signal distribution module receives the first audio signal and transmits a version of the audio signal to a plurality of gaming machine audio systems. In each gaming machine audio system, a mixer operable to receive the version of the first audio signal and mix it with a second audio signal produced in the gaming machine and feed a mixed signal to an audio power amplifier circuit driving the gaming machine speakers.

The present disclosure includes devices, systems, and methods for electrically connecting and disconnecting portions of an electrical line of a public address system. One device includes a switch configured to electrically connect and disconnect a first and a second contact point, wherein the first and the second contact point are configured to be electrically connected to respective portions of the electrical line, a controller configured to control the switch based on at least one electrical characteristic at the first and / or second contact point, and a power supply configured to be electrically connected to the first contact point via the switch.

To provide a broadcast wireless system capable of correctly transmitting audio to a resident, and a public-address slave station and a signal processing device for the broadcast wireless system.SOLUTION: A broadcast wireless system according to an embodiment of the present invention comprises a master station facility, and at least one public-address slave station installed outdoors, and broadcasts loudspeaker information including an audio signal distributed from the master station facility to the public-address slave station from the public-address slave station. The master station facility has a transmission unit for transmitting the audio signal and environmental information including data related to at least one of a temperature, a humidity, and a weather of a location where the master station facility or the public-address slave station is installed to the public-address slave station. The public-address slave station has: a receiver for receiving the audio signal and the environmental information; a loudspeaker for reproducing the audio signal; and a signal processing device for correcting the audio signal based on the environmental information so that an evaluation index relating to clarity of the audio reproduced by the loudspeaker becomes a predetermined reference value.SELECTED DRAWING: Figure 1

A device, system, and method whereby a speech-driven system can distinguish speech obtained from users of the system from other speech spoken by background persons, as well as from background speech from public address systems. In one aspect, the present system and method prepares, in advance of field-use, a voice-data file which is created in a training environment. The training environment exhibits both desired user speech and unwanted background speech, including unwanted speech from persons other than a user and also speech from a PA system. The speech recognition system is trained or otherwise programmed to identify wanted user speech which may be spoken concurrently with the background sounds. In an embodiment, during the pre-field-use phase the training or programming may be accomplished by having persons who are training listeners audit the pre-recorded sounds to identify the desired user speech. A processor-based learning system is trained to duplicate the assessments made by the human listeners.

1. The name of the design product: network constant-voltage power amplifier. 2. The use of the design product: the design product is used in the field of public broadcasting system audio transmission, mainly applied to the audio transmission of public broadcasting system in schools, shopping malls, stations and other public places. 3. The design points of the design product: in shape. 4. The picture or photo that best indicates the design points: assembly 2 perspective view.

A Class-D amplifier is disclosed, comprising: a switching circuit that generates a switched DC voltage by performing switching between a first DC voltage and a second DC voltage (the first DC voltage and the second DC voltage are applied to the Class-D amplifier through a first voltage terminal and a second voltage terminal, respectively, wherein the DC level of the first DC voltage is higher than the DC level of the second DC voltage); a low-pass filter circuit (including an inductor); a first additional switching circuit coupled between the switching circuit and the inductor; a second additional switching circuit coupled between the inductor and an output terminal for outputting a speaker drive signal from the Class-D amplifier; an amplifier controller that controls the Class-D amplifier to operate in an idle state based on the absence of an input audio signal to the Class-D amplifier (control includes keeping the first additional switching circuit and the second additional switching circuit off during the idle state); and an idle state conduction forming two different circuit paths leading from the second voltage terminal through the inductor to the first voltage terminal, each in a different direction between the two terminals of the inductor. It includes a circuit (in which, during operation of the Class-D amplifier in the idle state, one of two different circuit paths provides conduction from the second voltage terminal through the inductor to the first voltage terminal).

Devices, systems, and methods for operating public address systems with IP-based amplifiers are described herein. In some examples, one or more embodiments include a computing device, and a public address system of a facility, comprising a plurality of speakers, an amplifier connected to the plurality of speakers, and a controller wirelessly connected to the amplifier, wherein the controller is configured to cause the plurality of speakers to play audio.

A hybrid in-person and remote audiovisual conference broadcasting system provides a centrally controlled system for managing and broadcasting the audiovisual data collected from mobile devices both in humanly perceptible proximity of an in-person public-address system and beyond humanly perceptible proximity to the in-person public-address system. In an exemplary embodiment, a moderator controls requests from various participant members to broadcast audio or video from their personal mobile device to the other group members. Some members may be in proximity to an in-person public address system where they may for example be able to hear amplified audio and see live projected or otherwise presented video. In this exemplary embodiment, remote users not in proximity to the in-person public address system may also participate by for example listening to and viewing the broadcast audiovisual data on their personal mobile devices. Both in-person / local users and remote users may request to be selected for broadcasting to all users.

The present invention achieves suitable acoustic quality evaluation of a loudspeaker communication system by objective evaluation without implementing a speaking test or a listening test, even in a call environment in which there is an ambient noise. An acoustic quality evaluation device according to the present disclosure comprises a first acoustic quality evaluation unit, an analysis unit, and a second acoustic quality evaluation unit. The first acoustic quality evaluation device presents an analytical reference signal, an analytical degradation signal, and an analytical ambient noise to an evaluator and acquires an analytical subjective evaluation value. An analysis device determines an analytical PESQ value from the analytical reference signal and the analytical degradation signal, and determines the relationship between the analytical subjective evaluation value and the analytical PESQ value. The second acoustic quality evaluation device determines a test PESQ value from a testing reference signal, a testing degradation signal, and a testing ambient noise, and in accordance with the relationship, calculates, from the test PESQ value, estimated subjective evaluation values of the testing degradation signal for the testing reference signal testing ambient noise obtained through comparison under the testing ambient noise.

The utility model relates to the technical field of broadcasting equipment, and discloses public broadcasting equipment for weak current engineering, which comprises a mounting frame mounted on a mounting rod, broadcasting equipment is mounted in the mounting frame, a through groove is formed in the lower end of the mounting frame, a limiting pressing plate is slidably connected to one side of the through groove, and a moving pipe is fixedly connected to one side of the limiting pressing plate. One side of the moving pipe is in threaded connection with a lead screw, one side of the lead screw is fixedly connected with a gear, one side of the gear is rotationally connected with the inner side wall of the lower end of the mounting frame, and through the structures such as a limiting pressing plate, the moving pipe and the lead screw arranged at the through groove in the lower end of the mounting frame, when the broadcast equipment is placed on the mounting frame for use, the limiting pressing plate is used for limiting and protecting a connecting wire; according to the broadcast equipment, the connecting wire is fixed after being connected with the lower end distribution box, the situation that connection is disconnected due to continuous shaking in the using process is avoided, the broadcast equipment can be continuously used outdoors, and the broadcast equipment can be protected to a certain degree through the protection net frame on the protection rod.

The invention discloses a multi-gear audio attenuation and selection cooperative control system, and relates to the technical field of public broadcast systems, and the system comprises a wireless microphone receiving module which receives a UHF frequency band signal, and outputs an audio frequency after processing, adjusting and filtering; the FM radio module receives broadcast signals through the special telescopic antenna; the multimedia playing module obtains audio through a USB or Bluetooth; the audio selection module responds to the instruction to switch an audio channel, eliminate sonic boom and realize non-attenuation transmission; the evading control module detects microphone signals and triggers multimedia audio attenuation and gradient recovery; the audio amplification module amplifies the signal and ensures low distortion and high signal-to-noise ratio; the man-machine interaction module inputs instructions through keys, and the LCD displays information in real time; the power supply management module provides stable DC voltage, inhibits interference and monitors the voltage state. The anti-interference capability and the audio definition of the wireless microphone are improved, the emergency response is fast, various public broadcast scenes are adapted, and the use experience and the operation stability are improved.