58results about How to "Clear sound quality" patented technology

A bone conduction speaker having a vibration prevention structure is disclosed. In the speaker structure that a magnet and a voice coil are installed in the interior of a housing disposed in an inner side of an external casing of a bone conduction speaker and are engaged with a yoke, and a diaphragm is installed in an outer side of the yoke, there is provided a bone conduction speaker having a vibration prevention structure which comprises one or at least two ribs which are formed as an outer side of the diaphragm is outwardly extended; and an engaging part which is disposed in an end of each rib and is fixedly assembled to the casing.

A system for the projection of cinematographic works or digital works with sound having at least one sound channel. The system comprises a screen and, for the sound channel, at least one woofer and at least one medium/treble transducer. The screen is a non-perforated screen. The medium/treble speaker is a flat sound transducer placed against the screen to the rear thereof in relation to the direction of projection. An extreme treble speaker is disposed on the periphery of the screen.

This invention discloses one ear small phone to process ear phone front and back shells, wherein, the materials is of good resistance property to absorb redundant vibration besides trumpet to make the sound quality more pure, clear; the materials quality is of good spring and tightness to absorb trumpet.

The invention discloses a helmet provided with a multifunctional head strap. The helmet comprises a helmet main body, a control circuit board which is integrally formed on the helmet main body, the head strap arranged on the inner side of the helmet main body and bone conduction earphones which are arranged on the head strap, wherein the bone conduction earphones are electrically connected to the control circuit board; each of the bone conduction earphones comprises a vibrating sheet and a driving device for driving the vibrating sheet to vibrate; the vibrating sheets are fixedly arranged on the head strap; a regulator is arranged on the head strap for regulating the tightness degree of the head strap; and the driving devices are capable of driving the vibrating sheets to vibrate, so that the head strap is synchronously vibrated indirectly, and a bone conduction effect is caused in the vibrating process of the head strap. The helmet disclosed by the invention is good in sound effect; the helmet is capable of making a sound without vibration of an air medium, and various frequency bands are quite clear in sound quality. The resonance-type riding helmet disclosed by the invention has many practical functions, and the defect of a conventional helmet, which has a single function, is overcome; and the helmet is strong in practicability and is relatively strong in significance of popularization.

The invention relates to a 5.1 sound channel bass reflex type earphone and a manufacture method thereof. The method comprises the following steps of: arranging an independent space in an earlap; arranging a mega bass loudspeaker in the independent space of the earlap, wherein the basin surface of the mega bass loudspeaker faces towards the inner wall of the independent space; arranging a front loudspeaker, a middle loudspeaker and a rear loudspeaker in the independent space corresponding to the mega bass loudspeaker, wherein the front loudspeaker, the middle loudspeaker and the rear loudspeaker are distributed in a triangular shape, the three loudspeakers have inclination angles towards a central point and are put front and back with distances, and sound emitted from the mega bass loudspeaker in the independent space is reflected to the front through the inner wall of the independent space, mixed with the sound of the front loudspeaker, the middle loudspeaker and the rear loudspeaker and then emitted so as to obtain bass lower than lower frequency directly emitted from the front and the effect of isolating medium and high frequency. The structure of the earphone comprises the megabass loudspeaker, the front loudspeaker, the middle loudspeaker and rear loudspeaker.

A semiconductor device is disclosed. The semiconductor device includes a digital audio circuit which converts an input digital signal into an analog audio signal, a DC-DC converter having a switching power source circuit, and an audible frequency determining circuit. In order that a difference between a frequency of a first clock signal for digital to analog conversion which is used in the digital audio circuit and a frequency of a second clock signal for switching control which is used in a DC-DC converter exceeds a maximum audible frequency, a frequency comparing circuit in the audible frequency determining circuit outputs a signal to a frequency changing circuit in the DC-DC converter. The frequency changing circuit causes a second oscillating circuit to change the second frequency.

The invention relates to the technical field of automobile electronics, specifically to a method and a device for cleaning up carbon deposited in an automobile engine, wherein the device comprises a sensor, a controller and a pulse generator, wherein the controller is composed of a power circuit, a signal input circuit, a processor and a signal output interface, wherein the signal input circuit, the processor and the signal output interface are orderly connected; the pulse generator is composed of a condition indicator, a pulse circuit and a signal output circuit, wherein the pulse circuit and the signal output circuit are connected with each other; the sensor is connected with the signal input circuit of the controller; and the pulse generator is connected with the signal output interface of the controller. The method and the device provided by the invention can transmit a pulse signal timely according to an operation condition of the engine so as to clean up original deposited carbon of the engine, prevent newly deposited carbon from being generated, ensure a combustion condition is optimal under various conditions, and improve overall performance of entire automobile.

The invention discloses a manufacturing method of a 3D-printed hearing aid casing. The method includes the following steps that firstly, three-dimensional reconstruction is performed on medical imagedata of a hearing-impaired person, three-dimensional data of the ear canal of the person are obtained, a model is formed by the aid of three-dimensional software and then is designed and optimized bythe aid of the three-dimensional software according to the reconstructed three-dimensional data, the optimized model is printed by the aid of a 3D metal printer to form the casing, and aftertreatmentwork is performed on the casing. According to the manufacturing method of the 3D-printed hearing aid casing, technical materials for printing adopt titanium or titanium alloys, printing is performed by the aid of the 3D metal printer, customization can be realized according to personal information, the casing can be relatively thin, multiple hearing aid elements can be placed inside the casing andinclude electronic elements and various other structures, the person can wear the casing comfortably, and mounting of hearing aid equipment is facilitated. The casing has the relatively high fittingdegree, so that the wearer can feel stable sound transmission, the tone quality is clearer, and the wearer is not prone to allergies.

The invention discloses a fire-special-use interphone, aims to provide the fire-special-use interphone with a more reliable security-call function or a self-help function, and solves the problem that when the fire is serious and the fire situation is complex, the requirement is difficult to be met, and the standby measures are deficient so that the situation in the fire can be obtained by command staff in time. The main point of the technical scheme of the invention is that the fire-special-use interphone comprises a shell and a circuit device arranged in the shell; the circuit device comprises an accidental alarm circuit and a talkback circuit; the accidental alarm circuit comprises an acceleration sensor used for sensing the shell speed, a control circuit connected with the acceleration sensor and used for performing signal processing, and a buzzer connected with the control circuit; and the control circuit judges the magnitude of the shell speed and controls the buzzer to give a strong sound alarm when the shell speed is less than a first speed value, and controls the buzzer to give a low sound alarm when the shell speed is greater than a second speed value.

The invention discloses a multi-channel wireless radio system which comprises a wireless explaining player covering channels from 64 to 256 and wireless explaining controllers. Each wireless explaining controller comprises a shell and a control circuit arranged in the shell, and the control circuit comprises a power circuit, a radio frequency identification module, a key decoding circuit, a FLASH storage, a CPU, an audio decoding circuit, a D/A conversion unit and an audio amplifier. By means of the wireless explaining player covering the channels from 64 to 256, frequency signals of different channel conversion control signals are sent to exhibition areas or scenic spots of multiple areas, tourists in the corresponding areas receive the frequency signals through the wireless explaining controllers, the control circuits are activated to be connected with the corresponding CPUs, so that audio content and/or video content of the FLASH storages can be called out and completely and continuously played, the tourists can hear explaining information of the scenic spots or the exhibition areas clearly and completely, the adjacent scenic spots or the adjacent exhibition areas do not interfere with each other and the tourists themselves cannot interfere with each other.

The invention relates to a single-magnetic head through-the-wall listener, which comprises a host, a probe, a wall probe and an earphone, wherein the upper part of the host is provided with a volume switch, a frequency regulation switch, a probe jack, a charging jack, an antenna jack, a sound recording jack and an earphone jack; and the probe, the wall probe and the earphone are connected with the host. Compared with the prior art, the single-magnetic head through-the-wall listener has high performance, high tone quality and high sensitivity, can meet using requirements under different conditions, wirelessly transmit signals away for listening and perform synchronous sound recording, and is simple and convenient to use.

The invention discloses an automatic meter reading system of an electric energy meter. The automatic meter reading system comprises an acquisition system and a collection system, the acquisition system comprises a microprocessor, the microprocessor is connected with an analog-to-digital conversion chip, a display, a GPRS communication device, a control circuit and a read only memory respectively, the analog-to-digital conversion chip is connected with a filter circuit and an amplification filter circuit respectively, the filter circuit is connected with a three-phase voltage transformer, the amplification filter circuit is connected with a three-phase current transformer, the acquisition system is connected with the GPRS communication terminal of the collection system through the GPRS communication device, the collection system also comprises a host computer, and the host computer is connected with the GPRS communication terminal, a display panel and a memory respectively. The automatic meter reading system does not need artificial onsite meter reading, saves manpower, is unlimited by the distance and space, can realize momentary meter reading, and saves much meter reading time; and the GPRS network has a wide cover range, and can meet the meter reading need of the electric energy meter, so the electric energy meter is always online, and the traffic cost is low.

The invention discloses a man-machine interacting device. The man-machine interacting device is assembled onto an unmanned bus and connected to a vehicle controller through a communication module. Theman-machine interacting device comprises a station selecting module for selecting stations, a display module for display video information or image information, an audio module for broadcasting arrival information and prompt information, an anti-pinch device mounted at a bus door, and a remote interacting module connected with a server through the communication module and used for communicating with the server. The m man-machine interacting device is simple in structure and effectively achieves effective interaction between passengers and the unmanned bus, thereby improving the experience ofthe passengers.

The invention discloses a voice signal acquisition system based on a DSP. The voice signal acquisition system comprises a differential amplification circuit, an A/D conversion circuit, a DSP processing circuit and a serial port expansion circuit. After eight paths of voice signals are conditioned by the differential amplification circuit, AD conversion is carried out by the A/D conversion circuit,and converted data enter the DSP processing circuit to be processed and then are uploaded to an upper computer through the serial port expansion circuit and an RS232 interface. According to the system, eight paths of voice signals are synchronously acquired and decoded in real time by utilizing the McASP and EDMA technologies in the DSP. Compared with a common data acquisition system, the systemis high in acquisition precision, good in linearity, stable in work, high in signal-to-noise ratio, clear in tone quality, high in sound reduction degree and high in practicability, and is particularly suitable for data acquisition in severe environments such as high temperature, low temperature and salt mist.

The invention discloses a teaching platform. The teaching platform structurally comprises a platform frame, a display screen and a platform column. The display screen is mounted on the platform frame;and the platform frame is locked with the platform column. The platform frame is composed of a supporting arc frame, a baffle, a sidetone wing, a keyboard drawer and a rack. The supporting arc frameis locked with the baffle and the rack; the rack is provided with the sidetone wing; and the keyboard drawer is connected with a rack track; the baffle is spliced and connected with the rack. The sidetone wing comprises a telescopic pressing plate, a left concave plate, a left turning plate, a right turning plate and a right concave plate. The telescopic pressing plate is connected with the left concave plate and the right turning plate through the track; and the left concave plate is connected with the left turning plate. According to the invention, the telescopic pressing plate drives the left concave plate and the right turning plate to be folded in a concave mode, the sidetone wing collects audio in the middle to produce sounds, an audio trimmer processes the audio, high-definition audio and noisy audio are separated; four surrounding loudspeakers cooperate with each other in a circulating sound production mode, three-dimensional circulating sound production is achieved, the propagation distance is long, and the propagation sound quality is clear.

The invention relates to a ceiling loudspeaker for sound, in particular a ceiling speaker, comprises a loudspeaker box body and a main loudspeaker, a subwoofer radiator and a tweeter respectively positioned in the loudspeaker box body, wherein the loudspeaker box body is an independent sealed box body, the main loudspeaker and the tweeter loudspeaker are installed on the front box wall of the loudspeaker box body, and the subwoofer radiator is installed on the front box wall and/or the rear box wall of the loudspeaker box body; at least one rear bass sound outlet hole is formed at the edge ofthe front box wall. As that main loudspeaker and the bass radiator interact with each other, the bass is greatly improved, and the sound quality of the conventional ceiling loudspeaker is superior tothat of the conventional ceiling loudspeaker by using a 3.5-inch ordinary loudspeaker; at that same time, the cost is reduced, the installation height is low, the volume is small, the weight is light,the ceiling is self-contained, and the installation and use of the ceiling are more convenient.

The invention relates to a vehicle-mounted communication system comprising an instant messaging information processing module, a vehicle-mounted Bluetooth module, a voice input module, a voice output module, an external connection module and an information input module; the vehicle-mounted Bluetooth module, the voice input module, the voice processing module, the voice output module, the external connection module and the information input module are connected with the instant messaging information processing module. The vehicle-mounted communication system can be connected to a mobile phone having a Bluetooth function and can also be connected to a mobile phone having no Bluetooth function, thereby expanding the application range, echo cancellation and noise elimination processing is carried out on collected driver answer voice information through the voice processing module so as to ensure that the sound quality of the driver answer voice information transmitted to the mobile phone is clear, therefore the communication quality is improved, the output volume of the voice output module can be automatically adjusted according to the environmental noise, and a telephone card can be inserted in the vehicle-mounted communication system for communication when the mobile phone is powered off.