165results about "Electric megaphones" patented technology

Disclosed are an emergency vehicle supporting device and system using a drone that resolve forward traffic congestion on a road on which an emergency vehicle is driving via the drone and supports securing of a driving path for the emergency vehicle. According to the present invention, an emergency vehicle supporting device mounted on the emergency vehicle generates drone control information and transmits the generated drone control information to the drone. Further, the drone flies according to the drone control information and a location change of the emergency vehicle and broadcasts an avoidance warning to surrounding vehicles around the flying drone, so that the surrounding vehicles may help the emergency vehicle secure a driving path and thus the emergency vehicle may arrive at a destination within a desired time.

The invention relates to the audio broadcast system, including the audio broadcast equipment, audio broadcast control device, application server and mobile terminal. The invention also relates to audio broadcast control method, the mobile terminal sends audio broadcast request information to the application server; the application server produces audio broadcast control information according to the audio broadcast request information and send it to the audio broadcast control device; the audio broadcast control device sends control signal and digital audio signal according to the broadcast control information, the audio broadcast device broadcast digital audio signal according to the control signal. The invention achieves the remote control of the audio player device; communication can be realized just need power cord between the audio broadcast device and the audio broadcast control device, the users can set up audio player device conveniently; it can control audio broadcast device broadcast downloaded from the Internet or local audio data by mobile terminal; it can set remote play list to control the broadcast list content of the audio broadcast device by mobile terminal.

Disclosed are a randomly addressing adaptive frequency-hopping wireless transmitter and the receiver thereof, which belong to short distance wireless communication audio-frequency transmitting and receiving device, and solve the discretional matching problem of the wireless transmitter and receiver and the inconvenience during the manufacturing of the manufactures. The transmitter of the invention includes a micro controller, a microphone, a volume tuning circuit, an audio signal process circuit, a signal mixing module, a frequency hopping sequence module, a radio frequency modulation and demodulation circuit and a radio frequency amplifying circuit; the transmitter also includes a random signal generation circuit, an address generation module and a pulse width modulation circuit. The receiver of the invention includes a radio frequency amplifying circuit, a radio frequency modulation and demodulation circuit, a frequency hopping sequence module, a signal separation module, audio signal recovery circuit, a volume tuning circuit, a micro controller and an audio amplifying circuit; the receiver also includes a pulse width modulation circuit and an address comparison module. The randomly addressing adaptive frequency-hopping wireless transmitter and the receiver of the invention realize the discretional matching of the transmitter and the receiver in large scale application without interference with other transmitters; meanwhile, the randomly addressing adaptive frequency-hopping wireless transmitter and the receiver of the invention bring convenience in manufacturing the same model wireless transmitter and receiver.

A voice amplifier for attachment to a mask has a sound reflector that faces outwardly of the mask when the voice amplifier is attached to the mask. A speaker faces inwards towards the sound reflector. Sound waves emanate from the speaker inward towards the sound reflector, reflect off the sound reflector and exit the voice amplifier through an outer peripheral gap and travel outwardly from the mask. The voice amplifier has an on / off switch mounted on the front of the voice amplifier. The voice amplifier cover has a front wall with a front surface facing away from the mask. The narrow end of the speaker is located closer to the front wall of the cover than the wide end. The cover front wall follows the profile of the speaker in a direction from the narrow end to the wide end of the speaker.

An improved light weight, portable public address system configured with high fidelity omni-directional and high wattage directional speakers for both indoor and outdoor use with a wide variety of sound inputs assembled in a self-contained, compact housing. Optional systems provide for the remote deployment of up to two speakers and the use of a remote wireless microphone. Improved options include a unique compact configuration that allows for modular construction of all components for plug and play operation and rapid field replacement; a weatherproof housing for operation in inclement weather, and a tape player to provide prerecorded programming.

The present invention discloses an integrated karaoke device, including a microphone and a sound box. The sound box includes a sound chamber (400) containing a loudspeaker (500). The integrated karaoke device further includes a connecting part (100) made of flexible material that is fixedly connected between a bottom of the microphone and a top of the sound chamber (400). The use of a flexible material connecting part (100) rather than a solid structural part reduces the transmission to the microphone of sound vibration generated by the sound box. The beneficial effect of implementing the present invention is that a flexible material connecting part is fixedly connected between the bottom of the microphone and the top of the sound chamber, and meanwhile, a gap is kept between the bottom of a printed circuit board (PCB) and the top of the sound chamber; and because the flexible material connecting part can effectively reduce sound vibration, the transmission of vibration to the microphone from the sound box can be effectively eliminated, thereby preventing squealing, and enabling integration of the microphone and the sound box for use in karaoke.

A handheld wireless speaker comprises a body having a receiving chamber; a positioning seat installed within the receiving chamber. The body further has a battery chamber of receiving at least one battery. A sensor is assembled in the body. A volume control panel is assembled within the body. A plurality of buttons is installed on the volume control panel. The buttons is connected to the backboard of the body. An amplifier plate is assembled in the body. A wireless receiving plate and infrared receiving plate are assembled in the body. A mask cover is installed in the front wall of the body. The mask cover has a light filtering mask. A net mask is installed on a wall of the mask cover. An inner surface of the mask cover is formed with a trumpet facing the net mask; and a CD player is assembled to a backboard of the body.

A hearing assistance system having a transmission unit (10, 10′) with a microphone arrangement (16) for capturing audio signals from a speaker's voice and means (20, 22) for transmitting audio signals via a wireless audio link (24); at least one receiver unit (12) for receiving audio signals from the transmission unit via the wireless audio link, the receiver unit having a speech quality indicator unit (40) for assessing the speech quality of the received audio signals and for providing an signal representative of the assessed speech quality; an arrangement (38) for stimulating a user's hearing according to the audio signals received by the receiver unit; and an arrangement (40) for providing an alarm signal if the assessed speech quality is below a predefined threshold value.

A voice amplifier for attachment to a mask has a sound reflector that faces outwardly of the mask when the voice amplifier is attached to the mask. A speaker faces inwards towards the sound reflector. Sound waves emanate from the speaker inward towards the sound reflector, reflect off the sound reflector and exit the voice amplifier through an outer peripheral gap and travel outwardly from the mask. The voice amplifier has an on / off switch mounted on the front of the voice amplifier. The voice amplifier cover has a front wall with a front surface facing away from the mask. The narrow end of the speaker is located closer to the front wall of the cover than the wide end. The cover front wall follows the profile of the speaker in a direction from the narrow end to the wide end of the speaker.

This invention relates to a piezoelectric loudspeaker to generate sound wave transmitting to the external space, and improve sound pressure standard and useable frequency range through combining sound wave channels which have resonant cavity with space resonant frequency and increased cross-sectional area. The sound wave channel has an inlet and an outlet, in which, the inlet links the opening of the resonant cavity. The outlet leads to the external space which cross-sectional area increases from the inlet to the outlet. The sound wave from resonant cavity enters into the sound wave channel through the opening and the external space followed. The resonant cavity connects and compresses air to generate sound wave by dint of mechanical deformation from piezoelectric actuator. The wave is amplified by resonance in the cavity, and then transmits to the channel external space through wave channel.

The embodiment of the invention discloses an intelligent voice device and a control method thereof. The intelligent voice device comprises a movable part which can be combined with or disengaged fromthe intelligent voice device on the physical structure, and a movable microphone and a micro speaker which are arranged on the movable part and connected with a main control unit. If the main controlunit judges that the movable part is disengaged from the intelligent voice device and it is detected that the movable part and a communication client side are in a communication state, voice signals collected by the microphone are sent to the communication client side, and audio signals sent by the communication client side are sent to the micro speaker; if the main control unit judges that the movable part and the intelligent voice device are in a disengaged state and switching signals generated by a switching detecting circuit are detected, the received audio signals are sent to the micro speaker. In the intelligent voice device, when the movable part is taken up to be disengaged from the intelligent voice device, through the communication of the microphone and the micro speaker, the communication privacy is ensured, and the intelligent voice device is more convenient and intelligent to use.

The invention relates to a microphone assembly for use with an aftermarket telematics unit. A microphone assembly for use with an aftermarket telematics unit mounted in a passenger compartment of a vehicle is disclosed herein. The aftermarket telematics unit has a chamber having an opening that generally faces towards a rear of the vehicle and the microphone assembly includes, but is not limited to, a directional wideband microphone disposed within the chamber. A preamplifier is internally mounted within the directional wideband microphone. The preamplifier has an electrical lead and is both electrically and structurally attached to the aftermarket telematics unit via the electrical lead. The electrical lead is the sole means of physical attachment between the directional wideband microphone and the preamplifier, on the one hand, and the aftermarket telematics unit on the other hand.

The invention discloses an amplifier back panel, which comprises a panel main body (1) and an installing part (2) fixed on the outer periphery of the panel body (1) in a surrounding way. The amplifier back panel is characterized in that the panel main body (1) is provided with a wireless microphone receiving area (3), a signal input control area (4) consisting of a Bluetooth interface (4.1.1), an SD (Secure Digital) interface (4.1.2), a USB (Universal Serial Bus) interface (4.1.4), a 3.5mm socket (4.2.1) and an RCA socket (4.2.2) and a multifunctional socket (4.3.1), and an input power supply control area (5) in sequence from top to bottom. By adopting the structure of the amplifier back panel, a plurality of sound source input ways can be realized, and high universality is achieved; moreover, a plurality of amplifiers can be used together through an arranged signal output interface, so that the length of a connecting circuit is reduced. Moreover, a storage battery is provided, so that work without an external power supply can be realized.

The present invention provides a portable wireless loudspeaker, which is mainly provided with an inductor, a volume control board, an amplifier board, a wireless receiver board and an infrared receiver board in the body, a cover is provided in front of the body, and a cover is provided on the cover. There is a filter cover and a net cover. The speaker is assembled on the inner surface of the cover. There is a CD player on the back wall of the main body. The main body can receive the sound source output by the wireless microphone and the infrared microphone at the same time, and then the sound source is amplified by the speaker. Output, the sound is amplified and sent out through the amplifier board. Its output power is large, and the sound quality is stable and undistorted. The volume is only A4 size, small and light, and can be easily carried out for use.

The invention discloses a sound amplification method of a sound amplification system. The sound amplification system comprises a sound amplification host, at least one near-talk voice acquisition device and at least one far-talk voice acquisition device, wherein the near-talk voice acquisition device and the far-talk voice acquisition device are respectively connected with the sound amplificationhost, and the distance between the near-talk voice acquisition device and a sound source is smaller than the distance between the far-talk voice acquisition device and the sound source. The sound amplification method of the sound amplification system comprises the following steps: carrying out audio pre-processing on the first audio signal when a first audio signal acquired by the near-talk voiceacquisition device and a second audio signal acquired by the far-talk voice acquisition device are received; and carrying out sound amplification playing of the first audio signal subjected after theaudio pre-processing. The invention also discloses the sound amplification system and a computer readable storage medium. According to the invention, the tone quality of the audio signal played through sound amplification is ensured.

A wireless listening system includes a base operable to receive an electrical signal corresponding to an audio signal, including the ring of an incoming telephone call, up-convert the audio signal to an infrared signal, and transmit the infrared audio signal wirelessly therefrom, and a wireless headset operable to selectably receive either the infrared audio signal transmitted by the base, or an infrared signal corresponding to an audio signal transmitted by a public address system, down-convert the received signal back into the audio signal, and audibly reproduce the audio signal to a wearer of the headset. The system enables a hearing impaired listeners to enjoy their favorite audio programs without disturbing nearby persons with normal hearing and without missing an incoming telephone call, and is also compatible with public IR PA systems currently used to assist the hearing impaired community.

An audio transmission system of the present invention includes: an unmanned aircraft; a steering terminal that is used to steer the unmanned aircraft; and an information terminal configured to access a server providing a service for translating text data created in an official language of a country into a designated language other than the official language, and converting the translated text data into audio data, the information terminal being able to download the audio data from the server. The information terminal transmits the audio data in the designated language downloaded from the server to the unmanned aircraft, and the unmanned aircraft outputs the audio data in the designated language as an audio message from a speaker attached to an airframe.

The invention discloses a loudspeaker device, comprising an external frame and a loudspeaker component. A rotating slot with an upward entrance and a clamping slot of which entrance faces the rotating slot are arranged in the external frame. A rotating disk is rotationally mounted in the rotating slot through a rotating bearing. A middle end slot is arranged at a middle end of the rotating disk. A rise and fall arm is mounted in the middle end slot based on a sliding mode. An internal spiral hole with downward entrance is arranged in the rise and fall slot. A rise and fall spiral rod is mounted in the internal spiral hole through thread matching. A rotating middle end shaft is rotationally mounted at a lower end of the middle end slot through the rotating bearing. The upper end of the rotating middle end shaft is fixedly connected with the rise and fall spiral rod. The lower end of the rotating middle end shaft stretches to the clamping slot and is fixedly mounted with an upper rotating tooth-shaped wheel. An internal tooth edge is fixedly mounted at a bottom end of the clamping slot. A vertical side sliding cavity stretching along a vertical side is arranged in the rotating disk. A sliding frame is mounted in the vertical side sliding cavity based on the sliding mode. A rise and fall motor is fixedly mounted in the sliding frame.

There is provided a headphone or headset comprising at least one housing, at least one microphone for detecting interference sound, at least one active noise compensation unit for implementing active noise compensation based on the interference sound detected by the at least one microphone and for the output of a compensation signal. The headphone or the headset has at least one electroacoustic reproduction transducer for output of the compensation signal from the noise compensation unit and a circumaural cushion having a recess for receiving a spectacles side arm. The active noise compensation unit is adapted in noise compensation to take account of the effect of the recess in the ear cushion.

The invention discloses an IP network broadcast integrated sound box. The communication terminal comprises a communication terminal body, a loudspeaker, an anti-falling pad, a rotating disc and a lifting rod, the loudspeaker is embedded in the position, close to one side of a display screen, of the upper surface of a voice coil, one end of a telephone base is wrapped with the anti-falling pad, a storage card slot is formed in one side of the telephone base, and the rotating disc is arranged at the upper end of the base. The sound box is scientific and reasonable in structure and safe and convenient to use, by setting the loudspeaker, the size of incoming call sound can be enhanced; by setting an anti-falling pad, the problem that the service life of the communication terminal body is influenced by collision of the communication terminal body is avoided; by setting a storage card slot, communication contents can be recorded at any time, it is convenient for a user to store useful information, by setting the lifting rod and the turntable, the position of the communication terminal body can be adjusted and the direction of the communication terminal body is rotated at any time, and the sound box is simple in structure, practical in function and beneficial to operation of the user.

The invention belongs to the technical field of sound amplifying systems, and particularly provides a multi-scene self-adaptive intelligent sound amplifying system. The system comprises a transmittingend used for collecting human voice and sending the human voice; a receiving end which comprises a first communication unit which is used for communicating with the transmitting end; a second communication unit which is used for communicating with an external mobile player; a processing unit which is used for analyzing the data of the first communication unit to obtain a human voice signal; a synthesis unit which is used for carrying out combination processing on the human voice signal and the music signal received by the second communication unit; a playing unit which is used for playing thecombined sound signals; a switching unit which is used for switching the mode of the receiving end, wherein when the receiving end is in the self-adjusting mode, the proportion of the music signal inthe combined sound is reduced if the processing unit analyzes the data of the first communication unit to obtain the human voice signal. Compared with the prior art, the system can be applied to various scenes.

Disclosed is a modular voice amplification system for a protective mask that allows connection of a single amplifier assembly to masks of varying configurations through minimal adjustment of the system. Adapter plates in the form of mounting brackets are provided, each of which is configured for attachment to the single amplifier assembly, but is individually configured for attachment to protective masks of varying configurations through differing attachment mechanisms provided on each adapter plate.

This invention has given birth to a multi-purpose speaker, and this type of speaker contains an external cover, loudspeaker, power supply, microphone, magnified circuit, switch and a volume adjustor. In the front of the resonance cartridge in the loudspeaker is a spotlight. The external cover is composed of a loudspeaker, a handle and a back cover, among which the handle comprises a left and right cover. Both the covers are bolted together, and so are the loudspeaker and the handle, as well as the handle and the back cover. The speaker could be used both as torchlight and speaker after being turned on. Besides, people are also able to use the speaker as an alarming apparatus, radio and recorder, which could be recharged when facing power shortage by giving out shortage indication. In addition, it's structurally simple. Therefore, it is an ideal choice in many situations.

The invention discloses a functionally-diversified audio power amplifier circuit applying a rotary encoder. The circuit comprises a main control chip and a rotary encoder, wherein the rotary encoder is connected with the main control chip, and the main control chip is also connected with a display screen for displaying change levels. Through the cooperation of the main control chip and the rotaryencoder, the reverberation, reverberation delay and reverberation repeat functions of an audio power amplifier can be realized, complex circuits are not required, the manufacturing cost can be saved,and only one rotary encoder is adopted, the operation is simple, and the function upgrades or changes can be implemented; and meanwhile, the display screen is arranged, and thus the sound effect adjustment state can be intuitively viewed.

The invention provides a protection device for a radiology department doctor to block rays, belongs to the technical field of protection devices, and aims to solve the problem that an existing protection clothing protection device is very inconvenient to wear due to the fact that the protection clothing protection device needs to be worn when in use. The protection device comprises a protection box body, wherein a transparent protection glass cover is arranged on the upper portion of the front end surface of the protection box body, two long-barrel protection gloves are slidably connected to the upper portion of the front side of the protection box body in a bilateral symmetry mode, a supporting mechanism is arranged at the bottom of the protection box body, and a lifting mechanism is arranged on the bottom end surface in the protection box body. According to the invention, an accompanying person enters a protection box body from a box opening in the rear side of the protection box body, then a box door is closed, then the accompanying person stretches the two hands into two long-barrel protection gloves, and the protection device does not need to be worn and only needs to enter the protection box body, so that the protection device is more convenient to use and does not need to be supported by the body so as to reduce the physical loss of people.