45 results about "Condenser microphone" patented technology

The invention relates to the technical field of noise measurement systems, in particular to a noise measurement system for a new energy tire, which comprises a tire positioning and driving unit, a sensor unit, a data acquisition and synchronization unit, a data processing unit, a data analysis unit and a man-machine interaction and display unit, the tire positioning and driving unit simulates different loads, different speeds and different road conditions of a tire by using a rack type tire positioning device, and drives the tire to rotate by using a brushless mute motor, so that a high-speed rotating effect without introducing extra mechanical noise is realized; the sensor unit is arranged on the two sides of the tire and at the position close to the ground through an acoustic sensor free field type condenser microphone array, is fixed to the suspension support through an acceleration sensor and is used for collecting vibration signals; the running states of the tire under different loads, speeds and road conditions are accurately simulated, noise data of the tire under various actual working conditions are obtained, and the measurement result is closer to the real situation.

1. The name of the design product: Capacitor microphone (YF-A2). 2. The use of the design product: The design product is used for microphone. 3. The design points of the design product: in shape. 4. The picture or photo that best indicates the design points: perspective view.

1. The name of the design product: spring clip (520). 2. The use of the design product: for fixing on the bracket to hold the cell phone, microphone (condenser microphone). 3. The design points of the design product: the combination of shape and pattern. 4. The picture or photo that best indicates the design points: perspective view.

Provided is an acoustic device capable of effectively using voice even in noise. The present invention is provided with: a base body part (14) that can be worn by a user and that, when worn by the user, curves with a sound source on an inner side in a worn state; and an electret condenser microphone (20) that has flexibility, is mounted on the base body part (14) with the sound source on the inner side, and is curved so as to follow the shape of the base body part (14). By the curvature of the electret condenser microphone (20), a focal point of sound is formed on the inner side of the electret condenser microphone device (20). A plurality of directional surfaces (46A1 to 46A9) facing the focal point of sound are formed on the electret condenser microphone (20).

According to the multi-mode emotion regulation subtitle generation method fused with cognitive intervention, classroom teaching audio is collected through an omnidirectional condenser microphone, multi-dimensional acoustic features are extracted after preprocessing such as mute segment removal, noise suppression and signal normalization, the audio is converted into a text through a DNN-ASR model and a pre-training BERT model, and a semantic embedding vector is generated. An improved CNN-LSTM model is adopted to fuse acoustic and semantic features for emotion recognition, and a primary cognitive tag is generated in combination with a classroom situation knowledge base. Based on an emotion cognition theory, secondary modeling is carried out on emotion signals through an explanatory subtitle generation sub-model and a background annotation adjustment sub-model, an emotion adjustment factor matrix is formed, and weights are dynamically controlled. And finally, according to the adjustment factor, generating a multi-mode subtitle, matching a color code, a dynamic icon and a font style, and presenting the information on a teaching terminal. According to the invention, classroom teaching information processing efficiency can be effectively improved, and deaf students and other groups can be assisted to better understand teaching contents.

A pickup 10 for a sound-producing body according to one embodiment of the present disclosure comprises: a non-directional condenser microphone 11; and a chamber 12 formed in front of the non-directional condenser microphone 11. A part of the chamber 12 is defined by an elastic body 13 that has a first opening 13a penetrating along the inward-outward direction of the chamber 12. The pickup further comprises a weight body 14 layered on the elastic body 13 in a manner closing the first opening 13a.

The invention provides a condenser microphone, a semiconductor device and a manufacturing method thereof, which are applied to the technical field of semiconductors. According to the invention, the trench isolation structure is arranged in the substrate under the diaphragm structure, so that a high-insulation resistor is additionally arranged at the weakest part of the substrate under the diaphragm structure, and a leakage current path possibly generated between the diaphragm structure and the substrate is avoided by utilizing physical isolation; the leakage resistance between the vibrating diaphragm structure and the substrate is further increased, the parasitic capacitance between the vibrating diaphragm structure and the substrate is reduced, and the problems that the leakage resistance between the vibrating diaphragm structure and the substrate is reduced and the signal-to-noise ratio is reduced due to the loss of the isolating layer caused by the fillet first opening formed in the first sacrificial layer are solved.

1. The name of the design product: Capacitor microphone (EC001). 2. The use of the design product: For transmitting sound. 3. The design points of the design product: In shape. 4. The picture or photo that best indicates the design points: Perspective view 1.

The utility model relates to the technical field of capacitor microphones, in particular to a sound head polar plate adopting a zirconium oxide coating, which comprises a back polar plate, the vibrating diaphragm is parallel to the back polar plate, and a gap is reserved between the vibrating diaphragm and the back polar plate; and the zirconium oxide coating is arranged on one side surface, close to the vibrating diaphragm, of the back pole plate. Compared with the prior art, the utility model has the advantages that the capacitance of the sound head is obviously increased, and the sensitivity of the sound head is improved. Meanwhile, the film absorbing voltage of the microphone sound head can be increased, the stability of the microphone sound head can be improved, and the sensitivity can be further improved.

The utility model discloses a multi-mode electroencephalogram environment data real-time collector, and belongs to the technical field of electroencephalogram collection environment information real-time measurement, the multi-mode electroencephalogram environment data real-time collector comprises a mounting rack, the top of the mounting rack is provided with a sliding groove, a plurality of mounting holes are formed in the corners of the mounting rack in a penetrating mode, and the sliding groove is communicated with the mounting holes. A data acquisition main body is arranged in a sliding groove in the top of the mounting frame, a human body existence state sensing module, a control mainboard and a single chip microcomputer are mounted at the top of the data acquisition main body, and the bottom of the data acquisition main body is of a hollow structure; and an ambient light sensor, an electret condenser microphone and a digital temperature and humidity sensor are mounted on the surface of the top of the data acquisition main body. By monitoring the influence of environmental factors (such as illumination, noise, temperature and humidity) on the electroencephalogram activity in real time, whether the change of the electroencephalogram signal is related to the environmental factors or not can be recognized, so that the data accuracy is improved.

The application provides a condenser microphone, a semiconductor device and a manufacturing method thereof, and is applied to the technical field of semiconductors.In the application, a groove isolation structure is arranged in a substrate under a vibrating diaphragm structure, a high insulation resistance is additionally arranged at the weakest position of the substrate under the vibrating diaphragm structure, then a possible leakage current path between the vibrating diaphragm structure and the substrate is avoided by physical isolation, the leakage resistance between the vibrating diaphragm structure and the substrate is further increased, the parasitic capacitance between the vibrating diaphragm structure and the substrate is reduced, and the problems of the reduced leakage resistance between the vibrating diaphragm structure and the substrate and the reduced signal-to-noise ratio caused by the loss of the first opening with a rounded corner in the first sacrificial layer to the isolation layer are solved.

The application relates to the field of shield model testing and monitoring, and particularly discloses a slurry balance shield model testing device, which comprises a soil bin, a counterforce frame fixed to one side of the soil bin, a moving cabin capable of reciprocating sliding between the soil bin and the counterforce frame, and a multi-source sensor system. The moving cabin comprises a slurry cabin and an air cushion cabin which are independent of each other. A cutter head is arranged at the front end of the slurry cabin. A centrifugal pump is connected in series to a slurry inlet pipeline and a slurry discharge pipeline of the slurry cabin. The multi-source sensor system comprises a torque sensor connected to the cutter head, a pressure sensor connected to the slurry cabin, a pump body acceleration sensor connected to the centrifugal pump, and a condenser microphone arranged in the soil bin and facing a tunneling face. The device can simulate the coupling process of shield tunneling and slurry circulation under laboratory conditions in a high simulation mode, and can realize the synchronous and real-time collection of key multi-source physical parameters of cabin pressure, cutter head load, pumping vibration and tunneling face acoustic signals, thereby providing technical support for in-depth research on the evolution mechanism of complex working conditions such as slurry balance shield lagging.

This invention discloses a MEMS capacitive microphone, comprising a substrate, a support, and a diaphragm, wherein: the diaphragm is supported above the substrate by the support, and the substrate, the support, and the diaphragm form a vacuum cavity; the side of the diaphragm near the vacuum cavity is connected to an electrostatic clutch via a connecting rod; the electrostatic clutch is connected to a capacitive sensing structure. Compared with the prior art, the advantage of this invention is that it allows the microphone to operate under a wide range of atmospheric pressures that customers may expect. This is achieved electrostatically in a purely passive manner, which is advantageous over other designs that require complex electronics and active control. Since only small AC disturbances of the rotor need to be considered, without considering DC changes in rotor position, the diaphragm and sensing structure are physically decoupled, thereby simplifying the design of the sensing structure.

An apparatus for extracting a feature from a sound time series signal, the apparatus comprising: a condenser microphone comprising a diaphragm and a back plate, the condenser microphone for detecting the sound time series signal and outputting a feature signal indicative of a feature of data contained in the sound time series signal; the DC signal generator is used for generating a DC current signal, and the voltage amplitude of the DC current signal is larger than the amplitude of the minimum working bias voltage of the condenser microphone; the AC signal generator is used for generating a periodic AC current signal, and the voltage amplitude of the periodic AC current signal is smaller than that of the DC current signal; and a mixer for mixing the DC current signal and the periodic AC current signal to obtain a mixed current signal and applying the mixed current signal to the condenser microphone such that the condenser microphone presents a limit cycle behavior.

A device for receiving acoustic waves, includes an acoustic antenna able to function as a condenser microphone distributed along a line of the acoustic antenna comprising a conductor and a dielectric, the line being a transmission line or being configured to function as a transmission line when the dielectric makes direct physical contact with another conductor, an exciter configured to apply, in a receiving step, an input voltage to a first longitudinal end of the line so as to generate an input electromagnetic wave that moves toward a second longitudinal end of the line and so as to generate an output electromagnetic wave that moves in the opposite direction to the input electromagnetic wave, the input voltage simultaneously comprising a set of sinusoidal voltages comprising a fundamental sinusoidal voltage and a set of harmonics of the fundamental sinusoidal voltage, the frequency of the fundamental sinusoidal voltage being defined so that stationary waves are established in the line such that the output electromagnetic wave comprises directional acoustic-antenna channels.

1. The name of the design product: Capacitor microphone (YF-A1). 2. The use of the design product: The design product is used for microphone. 3. The design points of the design product: in shape. 4. The picture or photo that best indicates the design points: perspective view.

The application provides a USB stereo digital condenser microphone, which comprises a shell, a circuit board arranged in the shell, a first rotary press switch arranged on the shell and used for rotating and adjusting a sound source gain input and pressing and adjusting a sound source collection mode, an audio interface and a background lamp arranged on the shell, a second rotary press switch arranged on the shell and used for rotating and adjusting an audio interface volume output and pressing and adjusting a background lamp color, and the background lamp comprises a first background lamp arranged on the top of the first rotary press switch and the second rotary press switch, and the audio interface, the first rotary press switch, the second rotary press switch and the first background lamp are electrically connected with the circuit board. The two functions are realized through the rotary press switch, the switch setting is reduced, the first background lamp is directly arranged on the rotary press switch and used as a background interactive lamp and an indicating lamp, the functions of the microphone are realized through fewer components, and the microphone is convenient to quickly assemble.

The present invention discloses a condenser microphone with a new type of microphone plate electrode, which includes a microphone plate electrode. A first diaphragm clamping ring and a second diaphragm clamping ring are respectively arranged on the upper and lower sides of the microphone plate electrode. A gold-plated film is covered on the first diaphragm clamping ring, and a diaphragm is covered on the second diaphragm clamping ring. The gold-plated film is connected to a first microphone wire, and the microphone plate electrode is connected to a second microphone wire. A plurality of stepped through-holes and a plurality of blind holes are distributed on the upper surface of the microphone plate electrode. The plurality of stepped through-holes include a first through-hole arrangement, two second through-hole arrangements, and two third through-hole arrangements. One second through-hole arrangement and one third through-hole arrangement are symmetrically arranged on both sides of the first through-hole arrangement as a group, and the second through-hole arrangement is arranged between the first through-hole arrangement and the third through-hole arrangement. The advantage is that the condenser microphone has better directivity indexes.

The utility model discloses an outdoor noise monitoring sensor relates to noise monitoring sensor technical field. This outdoor noise monitoring sensor, including support sleeve, terminal, connecting wire, terminal and connecting wire electric connection, the inside of support sleeve is provided with sensor mainboard and condenser microphone, sensor mainboard and connecting wire electric connection, the outer wall of support sleeve is close to the top and is provided with the sound hole, the sound hole is in the outside of support sleeve and is distributed in the circular array, the outside of support sleeve is sleeved with T type mounting disc, the outer wall of T type mounting disc is provided with screw hole, the inner wall screw thread connection of screw hole has fastening bolt. The utility model discloses through multiple structure cooperation, avoids the erosion of wind and rain, dust to internal condenser microphone, sensor mainboard, guarantees the stable collection of sound wave signal again, has improved the monitoring precision and equipment durability under the outdoor complex environment significantly.

The invention discloses a photoacoustic spectrometry gas detection device and method based on a pi-type Helmholtz photoacoustic cell, and the device comprises a distributed feedback type semiconductor laser, a laser collimator, the pi-type Helmholtz photoacoustic cell, a condenser microphone, a control and data acquisition system, and a computer. Wherein the distributed feedback type semiconductor laser outputs modulated laser, the modulated laser is collimated by the laser collimator and then enters the Pi-type Helmholtz photoacoustic cell to excite target gas to be measured in the Pi-type Helmholtz photoacoustic cell, and the target gas to be measured generates periodic pressure fluctuation after absorbing laser energy; after being conducted by a connecting pipe of the Pi-type Helmholtz photoacoustic cell, a photoacoustic signal is generated at the detection cavity, the photoacoustic signal at the detection cavity is detected by using a condenser microphone, and the detected photoacoustic signal is transmitted to a control and data acquisition system and a computer for demodulation and subsequent processing. The device has the advantages of being good in resonant frequency matching performance, high in photoacoustic signal intensity and high in anti-noise capacity.

The invention relates to the technical field of sound equipment, and discloses a condenser microphone, which comprises a power supply conversion module, the power supply conversion module comprises a power supply module and a voltage stabilization module, the output end of the power supply module is connected with the input end of the voltage stabilization module, and the power supply conversion module is used for carrying out primary processing on conversion and adaptation of an input power supply voltage; the output end of the voltage stabilizing module is connected with the input end of the gain strengthening module; the input end of the high-resistance signal presetting module is connected with the output end of the gain strengthening module; the input end of the OTL power module is connected with the output end of the high-resistance signal presetting module, and the output end of the OTL power module is connected with the input end of the power supply module; the input end of the bias module is connected with the output end of the voltage stabilizing module, and the output end of the bias module is connected with the high-resistance signal presetting module and the OTL power module. The method has the advantages that the signal processing stability is improved, the nonlinear distortion is reduced, and the power supply voltage adaptation capability is enhanced.

The utility model provides a microphone circuit for eliminating near speaking effect and loud sound distortion, comprising a condenser microphone which is coupled with a DC bias power supply used for providing bias voltage, the anode output and the cathode output of the condenser microphone are respectively coupled with a load resistor R2, and audio signal voltage is taken out from two ends of the load resistor R2; the drain electrode of the low-resistance field effect transistor T1 is coupled with the positive electrode output of the microphone through a resistor R1, and the source electrode of the low-resistance field effect transistor T1 is coupled with the negative electrode output of the microphone; the input end of the overload shunt circuit is coupled with the positive electrode output of the microphone and the negative electrode output of the microphone, the output end of the overload shunt circuit is coupled with the grid electrode of the low-resistance field effect transistor T1, and the overload shunt circuit is used for controlling the on-off of the low-resistance field effect transistor T1 based on the output voltage of the microphone; when the output voltage of the microphone exceeds a preset threshold value due to the rising of a near speaking effect or strong noise, the overload shunt circuit outputs voltage / current to open the low-resistance field effect transistor T1, and the loop impedance of the microphone output circuit is smaller than the internal resistance of the direct current bias power supply, so that the bias voltage drops, the gain of the microphone drops, and the distortion is reduced.

The invention relates to the technical field of condenser microphones, in particular to a microporous waterproof condenser microphone which comprises a mounting ring, a plurality of mounting mechanisms are fixedly connected to the mounting ring, a head lamp is sleeved with the mounting ring, and a protective cover is fixedly connected to one side of the mounting ring. Two baffles are symmetrically and rotatably connected to an opening in the bottom end of the protective cover, a moving ring is arranged in the protective cover, a rotating ring is rotatably connected to the moving ring, and a condenser microphone is rotatably connected to the rotating ring. According to the capacitive microphone, the baffle can be driven to be closed while the capacitive microphone is retracted into the protective cover, so that the capacitive microphone is protected in the protective cover, meanwhile, a plurality of sound receiving micropores are formed in the sound receiving surface of the capacitive microphone, liquid can be fixed in the sound receiving micropores by utilizing the surface tension of the liquid, and the sound receiving effect of the capacitive microphone is improved. External liquid is prevented from entering the inside of the condenser microphone, and the waterproof effect can be effectively achieved.

This application provides a sound perception and localization method for humanoid robots, relating to the field of robotics. It constructs a basic three-dimensional sampling array by scientifically arranging four microphones, employing high-precision omnidirectional condenser microphones to achieve distortion-free acquisition of environmental sound signals. Simultaneously, it outputs raw sound signal data, precise sound pressure amplitude data, and related identification information. The raw sound signal is preprocessed using A-weighted sound levels that conform to human hearing characteristics, while filtering out DC components and high-frequency interference noise to output a human-like sound signal. Then, based on the theory of pulsating spherical source radiation sound field and a point source approximation model, combined with the human-like sound pressure data acquired by the microphone array and preset coordinates, the three-dimensional spatial coordinates of the sound source are accurately calculated. Multiple sound source coordinate results are obtained through multi-microphone array combination calculations, thereby achieving accurate judgment and high-precision localization of the environmental sound source and its location.

The present disclosure relates to an electret condenser microphone (1000), comprising: a case (10) comprising a case bottom (102) and a circumferential wall (104), wherein the case (10) is configured for grounding; a PCB assembly (20), comprising a PCB substrate (22) having a top side (22a) and a bottom side (22b); a diaphragm (30) and a back plate (40), wherein the back plate (40) is electrically conductive and communicatively connected to the PCB assembly (20); wherein the PCB assembly (20), the diaphragm (30) and the back plate (40) are arranged in the case (10), and contacts (282) for connecting to a power supply are arranged on the top side (22a) of the PCB substrate (22), and a field effect transistor (284) is arranged on the bottom side (22b) of the PCB substrate (22), and wherein a shielding layer (24) is arranged between the top side (22a) and the bottom side (22b) to eliminate power frequency interference.

The embodiment of the utility model provides a diaphragm assembly for a capacitor microphone and the capacitor microphone. The diaphragm assembly for the capacitor microphone comprises an inner diaphragm ring (1), an outer diaphragm ring (2) and a diaphragm (3), the inner membrane ring (1) is provided with a first port (11), a second port (12) and a first peripheral side (13); the outer membrane ring (2) is provided with a third port (21), a first bottom surface (22) and a second peripheral side (23) connected to the first bottom surface (22); the diameter of the diaphragm (3) is greater than that of the outer wall of the outer diaphragm ring (2); the diaphragm (3) is flatly laid on the inner wall of the second port (12); the inner membrane ring (1) is arranged in the outer membrane ring (2) in a sleeved mode, the second port (12) is pressed on the flatly-laid membrane (3) and tightly presses the membrane (3), and the outer wall of the first peripheral side (13) and the inner wall of the second peripheral side (23) are attached together in an interference fit mode. The inner membrane ring and the outer membrane ring can be repeatedly disassembled, assembled and adjusted, and the part loss rate is low.

An active noise reduction microphone circuit structure and an active noise reduction microphone are disclosed. The active noise reduction microphone includes a clamp, a retaining seat, an active noise reduction control board, an outer tube, and an electret condenser microphone. The active noise reduction microphone can be installed and secured to an external object quickly through the clamp. The outer tube and a sound-collecting tube are used for sound collection. By providing a preamplifier circuit, an ADC circuit and a DSP circuit, the active noise reduction microphone has an active noise reduction function and can be used conveniently.

The utility model discloses an automatic calibration device for a condenser microphone. The automatic calibration device comprises a PC (Personal Computer), a main control module and an electrostatic excitation module which are connected in sequence, the main control module comprises a main control unit, an RS485 communication unit, a user display unit and a data storage unit, and the RS485 communication unit, the user display unit and the data storage unit are all connected with the main control unit; the electrostatic excitation module comprises a signal generation circuit, a pole plate and a signal acquisition unit, wherein the signal generation circuit comprises an oscillation circuit, an amplification circuit and a filter circuit which are connected in sequence. According to the utility model, the automatic calibration device is additionally arranged on the basis of the original equipment aiming at the condenser microphone which is installed on site but does not have a calibration function, so that errors caused by manual operation in the traditional calibration process are simplified, and the measurement precision and the calibration efficiency of the original equipment are improved.

The utility model provides an acoustic support, comprising a pickup head frame which comprises a pickup head fixing ring and a vertical support column located below the pickup head fixing ring; the horizontal base plate is provided with a long hole, and a sliding rail is arranged in the circumferential direction of the long hole; the connecting ring is arranged on the periphery of the vertical supporting column in a sleeving mode so that the vertical supporting column can slide in the vertical direction; the connecting piece is fixedly connected with the connecting ring, the connecting piece comprises a lap joint part, and the lap joint part is embedded in the sliding rail and can slide in the horizontal direction. According to the acoustic support, the position of the pickup head fixing ring can be adjusted in the horizontal direction, so that the first distance between the vibrating diaphragm of the pickup head and the side plane is adjusted, and then the high-frequency directivity is adjusted; and the position of the pickup head fixing ring can be adjusted in the vertical direction, so that the second distance between the vibrating diaphragm of the pickup head and the bottom plane is adjusted, and then the low-frequency directivity is adjusted. The utility model also provides a condenser microphone comprising the acoustic support.

This application relates to the field of audio equipment technology and discloses a condenser microphone, including a power conversion module comprising a power supply module and a voltage regulator module. The output terminal of the power supply module is connected to the input terminal of the voltage regulator module. The power conversion module is used for preliminary processing of input power supply voltage conversion and adaptation. A gain enhancement module is also included, with the output terminal of the voltage regulator module connected to its input terminal. A high-impedance signal pre-adjustment module has its input terminal connected to the output terminal of the gain enhancement module. An OTL power module has its input terminal connected to the output terminal of the high-impedance signal pre-adjustment module, and its output terminal is connected to the input terminal of the power supply module. A bias module has its input terminal connected to the output terminal of the voltage regulator module, and the output terminals of the bias module are connected to both the high-impedance signal pre-adjustment module and the OTL power module. This application has the advantages of improving signal processing stability, reducing nonlinear distortion, and enhancing power supply voltage adaptation capability.