19results about "Electric megaphones" patented technology

The application discloses a sound amplification device, which comprises a vibrating body, the vibrating body comprises at least one first vibrating surface and at least one contact area for contacting with a vibration source, the vibration source and the contact area are in detachable contact, the area of the first vibrating surface is larger than that of the contact area, the vibration source is used for generating vibration, the vibration is transmitted to the first vibrating surface through the contact area and is transmitted outward through the first vibrating surface.

The utility model relates to the technical field of respirators, in particular to a fireman air respirator mask communication sound amplifying device, which comprises a mask main body, a communication sound amplifying device and a communication sound amplifying device, the dual-mode noise reduction microphone is embedded in the nose bridge of the mask main body; the flexible circuit board is mounted on the inner wall of the mask main body and is in signal connection with the dual-mode noise reduction microphone; the sound amplification loudspeaker is mounted at the lower jaw position of the mask main body, and the sound amplification loudspeaker directionally conducts sound through an acoustic flow guide cavity in the sound amplification loudspeaker; the connecting mechanisms are installed on the mask body and used for enabling the mask body to be stably worn on the head, and the number of the connecting mechanisms is at least one set; the alarm mechanism is mounted on the mask body and used for detecting stable fit between the mask body and the face; the magnetic control power supply mechanism is mounted on the mask main body, and the magnetic control power supply mechanism is electrically connected with the flexible circuit board; the noise reduction effect is high, and sound transmission is stable.

The utility model discloses a power amplification system for an electroacoustic alarm supporting out-of-band audio monitoring, which comprises a communication interface and control module, a test sound generation module, an audio processing module, a power amplification module and a voltage and current monitoring module, the communication interface and control module receives a control instruction of the alarm control module and issues the control instruction to the corresponding module, the test sound generation module generates out-of-band test audio with the needed frequency and amplitude, and the audio processing module is used for processing audio signals of the out-of-band test audio or alarm audio. And the power amplification module is used for performing power amplification on the processed audio signal and outputting the amplified audio signal to a loudspeaker, and meanwhile, controlling the voltage and current monitoring module to perform voltage and current monitoring on an audio output channel and sending monitoring data to the alarm control module through the communication interface and control module.

The application discloses an audio playing control method, comprising: acquiring first audio data; acquiring an environmental noise decibel value; performing sound source separation on the first audio data to obtain a plurality of second audio data with different frequency structures; adjusting the volume of the plurality of second audio data according to the environmental noise decibel value; performing audio mixing on the second audio data after volume adjustment; and adjusting the playing volume of the second audio data after audio mixing according to the environmental noise decibel value. The audio playing control method provided by the application can realize sound source separation of playing audio data, and adjust the volume of, for example, target sound source data and environmental sound source data according to the environmental noise condition, thereby improving the automatic adjustment capability of the system. The volume of sound of different sound sources is adjusted, so that sound containing substantial content such as a human voice sound source is highlighted in a noisy environment, and all kinds of sound sources are balanced in a quiet environment, giving people a sense of stability and improving the auditory experience.

Disclosed are systems and methods utilize networked speaker arrays and audio waveform shaping using interferometric feedback of sound transmitted by the speaker arrays. In further aspects, the systems and method employ an intelligently controlled acoustic device that can focus sound at specific locations and record the acoustic environment / reflected sound to self-calibrate for improved performance. Moreover, the device is modular and scalable with the ability to network distributed speakers to enhance the audio performance.

The present invention provides a sound transmission assembly and a sound transmission method for transmitting speech uttered by a user wearing a breathing apparatus mask for one or more sound applications. [Solution] A sound transmission assembly (100) for a respiratory device, comprising a mouth-covering mask (10) worn by the user of the respiratory device, the sound transmission assembly (100) comprising: at least one vibration sensor assembly (110) that generates an audio signal based on vibrations detected on the outer surface of the mask (10); a sound application assembly (130) that applies the audio signal obtained from the at least one vibration sensor assembly (110); and a sound processing unit (120) that preprocesses the audio signal obtained from the vibration sensor assembly (110) before passing it to the sound application assembly (130) for application.

This application provides an audio speaker, relating to the field of acoustic equipment technology. The speaker includes: a cabinet; a loudspeaker connected to the cabinet; a partition disposed inside the cabinet, dividing the space within the cabinet into a main cavity and a secondary cavity, with the loudspeaker opposite the main cavity; multiple passive radiators, each disposed on an opposing surface of the cabinet and the partition; a linkage connecting the multiple passive radiators, used to actuate the multiple passive radiators; and a perforated component disposed within at least one of the main cavity and the secondary cavity. This speaker can reduce the resonant frequency of the acoustic system, while absorbing standing waves and excess reflected sound energy, reducing acoustic interference and nonlinear distortion, and preventing noticeable bass trailing and muddiness.

The invention relates to the technical field of intelligent sound boxes, in particular to a sound system with an AI recognition regulation and control function, the sound system comprises a main box shell and a bottom supporting plate, and an electric control type turnover control module is arranged on the front side of the main box shell and right above a control assembly. According to the invention, the optical lens module is matched with the AI recognition module, so that real-time distance, position and action feature data of dancing personnel can be accurately collected and recognized, and intelligent perception of user states is realized; based on the identification data, the main control module can automatically adjust the overall power of the multi-loudspeaker module and the independent power of the loudspeakers in different directions, so that the problems that the volume adjustment of a traditional sound box depends on manual operation and the sound coverage is unbalanced are solved, the auditory suitability is improved, and meanwhile, the power consumption waste is also reduced; and the audio track correction module can correct the audio track in real time in combination with the action characteristics of the dancer, so that the music rhythm is highly matched with the dance action, and the dance coordination and experience feeling are enhanced.

The utility model provides an explosion-proof communication device for well drilling, and relates to the field of explosion-proof communication equipment for well drilling, the explosion-proof communication device for well drilling comprises two groups of hand-free communication machines, a microphone body, a communication junction box and a sound amplification assembly, the two groups of hand-free communication machines are respectively a host and a slave, each hand-free communication machine comprises a box body, a mainboard and a loudspeaker, the main board is fixed in an inner cavity of the box body, the loudspeaker is installed at the top of the box body, the microphone body is connected with the hands-free communication devices through a cable, the two hands-free communication devices are connected with each other through a communication junction box, the communication junction box is used for transmitting signals, and the sound amplification assembly comprises a power amplifier junction box and a sound amplification loudspeaker. According to the utility model, instructions are received through the host computer or the slave computer, and the microphone, the host computer, the slave computer, the junction box, the power amplifier junction box and the loudspeaker are combined for use, so that real-time communication can be realized in drilling operation, and the communication quality and the working efficiency are improved.

The invention discloses a local sound amplification method based on an acoustic feedback suppression technology, and belongs to the field of acoustic feedback suppression of sound amplification systems. The invention aims to solve the technical problem of poor howling suppression effect caused by impure reference signals and poor environmental adaptability in the prior art. According to the invention, a pure voice reference signal and a mixed audio signal are synchronously acquired through a bone conduction sensor and an air conduction microphone; measuring the acoustic environment of the sound amplification space according to the detection signal and adjusting the neural network prediction model; carrying out adaptive filtering on the mixed audio signal by adopting a pure voice reference signal to extract a speaker voice component; performing howling risk analysis according to the adjusted prediction model to generate potential howling frequency points; the potential howling frequency point is utilized to execute adaptive notch processing to form a primary suppression sound amplification signal; and finally, applying random micro-delay disturbance to generate a final suppression feedback sound amplification signal.

The utility model discloses a flute performance effect sound amplification device, which comprises a flute main body, a support sleeve plate, a guide sleeve plate and a sound amplification module adjusting mechanism, the support sleeve plate is fixedly sleeved on the outer wall of one end of the flute main body, the guide sleeve plate is rotatably sleeved on the outer wall of the support sleeve plate, and the sound amplification module adjusting mechanism is arranged on the guide sleeve plate. The sound amplification module adjusting mechanism comprises a supporting plate, a limiting assembly, an assembly head and a replacement assembly, the supporting plate is fixedly connected to the outer wall of the guide sleeve plate, the limiting assembly is installed on the outer wall of the supporting sleeve plate and connected with the outer wall of the guide sleeve plate, the assembly head is fixedly connected to the outer wall of the supporting plate, and the replacement assembly is installed on the assembly head and connected with the guide sleeve plate. Accordingly, the corresponding and appropriate microphone is replaced through the replacement assembly, effective sound amplification is achieved, the microphone can be driven to adjust different positions by rotating the guide sleeve plate, practicability is improved, meanwhile, after position adjustment of the microphone is completed, position fixing of the microphone can be achieved through the limiting assembly, and the practicability is improved. Therefore, the stability of the playing process is ensured.

The invention relates to a vehicle comprising: at least one lateral glazing; at least one vibration sensor arranged on a lateral glazing for detecting sound vibrations propagating on the glazing; at least one audio transmitter; a calculation unit connected to the vibration sensor and the audio transmitter; characterized in that the computing unit is arranged to: receive an electrical signal representing a sound signal from the vibration sensor; the signal is processed in order to isolate a useful signal representing speech, which is transmitted by the computing unit towards the audio transmitter.

The application relates to the technical field of acoustic signal processing and emergency broadcasting, and discloses a multi-source fusion alarm method and system for an emergency intelligent broadcasting system. The method comprises the following steps: acquiring multi-path environmental audio data collected by a distributed microphone array and a target audio signal to be broadcast; performing spatial energy spectrum analysis according to the multi-path environmental audio data to obtain an environmental noise distribution graph representing noise intensities of different coordinate points in space; determining a gain compensation parameter according to the environmental noise distribution graph and a discretized guide node, and performing gain adjustment on the target audio signal to obtain a to-be-projected audio signal; performing phased beamforming processing according to the to-be-projected audio signal and a calculated phase delay parameter to obtain a directional projection vector and drive a loudspeaker array to emit sound waves, thereby forming a spatialized guide sound field on an escape path. The method can realize accurate directional projection and dynamic path guidance of evacuation instructions in a complex high-noise environment.

To assist conversations between passengers inside a mobile vehicle with good sound quality. [Solution] A conversation assistance system comprising a plurality of conversation assistance devices arranged inside a mobile vehicle, each of the plurality of conversation assistance devices comprising a housing having at least one opening, a microphone mounted on the housing, a speaker unit having a sound-emitting part arranged inside the housing, and a guide member that guides sound from the sound-emitting part to the at least one opening, wherein the guide member causes the sound from the sound-emitting part to be emitted to the outside of the housing in a direction away from the microphone from the at least one opening.

The invention relates to the technical field of audio enhancement, in particular to an audio signal enhancement method in a tunnel environment based on directional sound waves, and the method comprises the steps: collecting audio signal data and audio decibel data at preset positions in a tunnel in real time; dividing the whole data acquisition time interval into various time periods, acquiring a wave crest fluctuation coefficient at each position in each time period, acquiring a wave crest difference coefficient at each position in each time period, and further acquiring a stability coefficient at each position in each time period; according to the change condition of the audio signal data at each position in the historical time period, acquiring the audio short-term variation at each position in each time period; and obtaining an interference coefficient and an adjustment urgency degree at each position in each time period, so as to screen the position where the broadcast audio signal needs to be enhanced in each time period. The invention aims to improve the propagation quality of broadcast audio, thereby ensuring that drivers and conductors can clearly listen to the content of tunnel broadcast everywhere in the tunnel.

The invention relates to the field of audio circuit and power supply management, and discloses battery-powered sound equipment with an intelligent power supply isolation function and a power supply control method of the battery-powered sound equipment. The problems that external power supply noise is easily introduced when existing equipment is used while being charged, and the plugging state cannot be sensed after main power supply is cut off are solved. The scheme is characterized in that a main power supply path is connected in series with a power supply switching unit, and the input side is connected with a bypass detection unit; when the equipment is in an audio working state, the power supply switching unit is disconnected to enter a pure battery power supply mode to physically isolate noise; during the disconnection period, the bypass detection unit continuously monitors the state of the input voltage, identifies plugging and executes recovery control. The invention is mainly used for various battery-powered sound equipment.

Systems and methods for volume control over intercom trunks. One example method includes receiving a call request from a first key panel coupled to a first intercom that identifies a remote key panel coupled to a second intercom. The method includes sending a trunk request based on the call request and receiving a trunk setup message. The method includes activating a first crosspoint to provide a bidirectional audio connection between the first and second intercom devices. The method includes applying a trunk gain value to the first crosspoint based on the remote key panel and transmitting an audio stream received from the first key panel with an audio gain based on the trunk gain value. The method includes receiving a gain adjustment value associated with the first key panel and the remote key panel from the second intercom and applying an adjusted trunk gain value to the first crosspoint based on the gain adjustment value.

The present invention relates to a vehicle comprising: at least one side window; at least one vibration sensor arranged on the side window to detect sound vibrations propagating on the window; at least one audio transmitter; and a computing unit connected to the vibration sensor and to the audio transmitter; characterised in that the computing unit is arranged to receive an electrical signal representative of a sound signal from the vibration sensor to process said signal in order to isolate a useful signal representative of a voice, the useful signal representative of a voice being sent by the computing unit to the audio transmitter.

A saxophone with a sound amplification accompaniment function relates to the technical field of saxophone equipment, the front end of a saxophone main body is provided with an elbow, the elbow is provided with a sound amplification accompaniment mechanism, the sound amplification accompaniment mechanism comprises a horn tube and a playing mechanism, the playing mechanism is arranged at the top end of the horn tube, the horn tube is internally provided with a control mainboard, the control mainboard is provided with a control chip, and the control chip is provided with a sound amplification accompaniment function. The control chip is in wireless connection with the playing mechanism, the bent pipe is further provided with a connecting pipe connected with the horn pipe, the connecting pipe is internally provided with a pickup head, the pickup head is electrically connected with the control mainboard, the Bluetooth loudspeaker box and the pickup head are arranged in the horn pipe of the saxophone, sound amplification can be performed in real time during playing, and audio accompaniment signals are transmitted through external equipment, so that the saxophone is more convenient to play. And sound mixing output is realized, so that the performance convenience is improved, and better experience is brought to players and audiences.