12 results about "Directional microphone" patented technology

The invention relates to a method and an apparatus for improving the intelligibility of a group of persons engaged in conversation, each person in the group being able at times to be a speaker and at times to be a listener. The persons are situated at two or more positions P. For this purpose, a system (1) is used comprising: two or more directional microphones M which are directed towards the positions P; two or more directional loudspeakers L which are likewise directed towards the positions P; and a digital signal processor DSP which is capable of processing and forwarding acoustic signals in real time. Each microphone M continuously receives acoustic signals Ai and forwards them to the DSP. The DSP identifies, in real time, a speech signal Si1 from each acoustic signal Ai and generates therefrom a processed speech signal aSi1. The DSP transmits the processed speech signal aSi1 to one or more other loudspeakers L. The DSP detects later-arriving speech signals Si2, Si3 having the same characteristics as reflections of the speech signal Si1, and generates therefrom, in real time, processed reflected signals aSi2, aSi3, which the DSP transmits to another loudspeaker L within a predetermined time window (4) having a duration of at most 40 ms.

This utility model discloses an adjustable pickup angle microphone, relating to the field of microphone technology. It includes a directional microphone body and an adjustment component. The bottom of the directional microphone body has a support frame, and the adjustment component is located on one side of the support frame. The adjustment component includes a side plate, a side cover, a first motor, a worm gear, a worm wheel, and an adjustment shaft. The side cover is mounted on one side of the side plate, and the first motor is fixed to the bottom of the side cover. Through the adjustment component, when the pickup angle of the directional microphone body needs to be adjusted, the first motor drives the worm gear to rotate, which in turn drives the adjustment shaft to rotate, adjusting the pitch angle of the directional microphone body. In conjunction with a second motor, a gear and a gear ring drive the base plate to rotate, changing the orientation of the directional microphone body. This allows for precise pickup at specific angles, further expanding the device's application range.

This invention discloses a subject data acquisition system based on multi-mode interaction. The system includes an edge computing gateway, and a flexible piezoelectric thin film array, a millimeter-wave radar module, and a directional microphone array, all connected to the edge computing gateway. The edge computing gateway is configured to control the millimeter-wave radar module to operate at a low duty cycle and extract the compression profile in basic scanning mode. When the piezoelectric signal envelope variance exceeds the limit, it triggers entry into a directional diagnostic mode, calculating the geometric centroid coordinates and extracting the main peak of ventricular ejection. Based on these geometric centroid coordinates, the beamforming weight vector of the directional microphone array is updated to extract the audio signal sequence. The cross-correlation function between the main peak and the Doppler phase signal trough of the chest wall displacement is calculated to obtain the time delay parameter. After sliding window compensation alignment and feature vector extraction, the results are input into the model to output the state confidence assessment result. This application can achieve high signal-to-noise ratio and low false alarm rate for accurate spatiotemporal alignment of multi-source heterogeneous physiological signals and imperceptible monitoring of abnormal states.

This application discloses a multimodal guided emergency supplies location and medical order recording system, relating to the field of medical equipment technology. The system includes: a central processing unit, a mobile interactive terminal, and a visually guided medicine cabinet. The mobile interactive terminal has a built-in directional microphone array, used to collect on-site voice through the directional microphone array and transmit the voice to the central processing unit. The central processing unit issues LED control commands to the visually guided medicine cabinet based on the on-site voice and records the medical order information identified from the on-site voice. The visually guided medicine cabinet includes multiple partitions, each corresponding to an independently addressable LED indicator. The visually guided medicine cabinet has a built-in medicine cabinet controller, used to control the corresponding LED indicator to light up according to the LED control commands. This application improves the accuracy of emergency supplies guidance and the efficiency of medical order recording.

This invention discloses an interactive TR robot and its interaction method, relating to the field of robot interaction technology. It includes a workbench and a voice acquisition device. A lower microphone is located at the top of the outer wall of the workbench, and the lower microphone has a wider bottom and narrower top structure. A voice acquisition device is located at the top of the outer wall of the lower microphone, and eight upward-tilted acquisition holes are located on the side of the outer wall of the voice acquisition device. An upper microphone is located at the top of the outer wall of the voice acquisition device, and the upper microphone has a wider top and narrower bottom structure. This invention, by incorporating the upper microphone, lower microphone, voice acquisition device, eight sets of tilted acquisition holes, and a directional microphone, achieves converged sound wave acquisition and directional noise reduction from eight groups, suppressing noise from non-target directions, significantly improving the strength and accuracy of voice signal acquisition, and clearly capturing operator voice even in noisy environments.

This utility model discloses an audio processing module for an industrial camera with sound field direction analysis, including a microphone array containing at least three asymmetrically distributed directional microphones, configured in the circumferential edge region of the industrial camera housing, for acquiring multi-channel audio signals within the target sound field range; through the setting of high-precision sound field direction, and through a dual-layer asymmetrical microphone array (6 cardioids in the inner ring + 12 supercardioids in the outer ring) and MVDR beamforming algorithm, a 2.5° azimuth resolution is achieved in the 12kHz frequency band, which is 67% higher than that of traditional uniform arrays, and effectively suppresses multipath reflection interference in the industrial environment (positioning error < ±5cm / 3m).

This invention discloses a method, system, terminal, and medium for directional fan-shaped sound pickup based on a microphone linear array. The method includes: establishing a microphone linear array, which includes at least one directional microphone and several omnidirectional microphones; determining the sound source angle and the distance between the sound source and the center of the omnidirectional microphones based on the phase difference between the omnidirectional microphones; determining a fan-shaped sound pickup area based on the sound source angle and distance to achieve fan-shaped sound pickup; determining the positional relationship between the sound source and the microphone linear array based on the amplitude difference between the directional microphone and any one of the omnidirectional microphones; and obtaining a directional fan-shaped sound pickup area based on the positional relationship and the fan-shaped sound pickup area to achieve directional fan-shaped sound pickup. The positional relationship refers to the sound source being located in front of or behind the microphone linear array. This invention can precisely control the pickup distance and angle, effectively solving the problem of directional fan-shaped sound pickup.

This utility model belongs to the field of hearing aid technology and discloses a behind-the-ear hearing aid, including a hearing aid suspension shell and an amplifier, receiver, and battery disposed inside the hearing aid suspension shell. Multiple miniature directional microphones are embedded on the front, top, and rear sides of the hearing aid suspension shell, and multiple independent acoustic channels are provided inside the hearing aid suspension shell. This utility model enhances the ability to pick up target speech from the front by embedding integrated miniature directional microphones on the front, top, and rear sides of the hearing aid shell in an asymmetrical spatial arrangement, and by providing multiple independent acoustic channels inside the hearing aid shell. Each independent acoustic channel is equipped with an electrically adjustable miniature acoustic damper, which can physically reduce noise, suppress side and rear noise, wind noise, and interference in specific frequency bands, and improve the basic signal-to-noise ratio. The independent acoustic channels can physically isolate the sound signals of each channel, improving speech clarity.

The utility model relates to microphone technical field and disclose a kind of intelligent voice interaction directional microphone, including microphone body, the bottom of the microphone body is provided with charging port, the surface of the microphone body is fixedly connected with connecting frame, the bottom of the connecting frame is sleeved with adjusting assembly, the adjusting assembly includes sleeve, the surface of the sleeve is fixedly connected with threaded sleeve one, the inside threaded connection of threaded sleeve one has threaded rod one, the bottom of the sleeve is fixedly connected with mounting bracket, the inner wall of the mounting bracket is fixedly connected with fixed column.The utility model is provided with movable sleeve, after completing the fixation of microphone body, rotating threaded rod two, so that threaded rod two and the surface of the stop plate are separated, movable sleeve loses the extrusion force received, so that movable sleeve can rotate on the surface of fixed column, after the fixation of microphone body, the angle of microphone body can be adjusted, and the use of microphone in suitable position can be selected.

The application provides a sound pickup module, a sound recorder and a sound pickup method. The sound pickup module comprises a base body, an omnidirectional microphone, a directional microphone assembly and a driving assembly. The base body is provided with a control unit. A plurality of omnidirectional microphones are dispersedly arranged on the base body and are signal-connected with the control unit to transmit sound source information to the control unit. The directional microphone assembly is rotationally arranged on the base body. The driving assembly is arranged on the base body and is drivingly connected with the directional microphone assembly. The driving assembly is control-connected with the control unit to control the directional microphone assembly to turn according to the sound source information, so that the sound receiving range of the directional microphone assembly at least partially overlaps with the sound source distribution range. The directional microphone assembly can automatically adjust the sound receiving direction with the assistance of the omnidirectional microphone and the control unit, so that the directional microphone assembly can pick up sound in different directions and avoid excessive manual assistance, thereby balancing the convenient operation and the better sound pickup effect.

The utility model is suitable for the field of vibration detection, provides a kind of anti misjudgment vibration detection device, including vibration detection module, sound detection module, main control module, alarm module and shell;The vibration detection module adopts magnetic displacement sensor, for detecting vibration mechanical wave and conversion into electric signal;The sound detection module adopts directional electret microphone, for picking up the sound wave signal generated by impact and conversion into electric signal;The vibration detection module and sound detection module are respectively connected with special amplification circuit, and electric signal is amplified to the detectable range of main control module;In the utility model, through the double signal fusion mode of vibration detection and sound detection combination, the accurate processing of signal in combination with special amplification circuit, utilize directional microphone to filter non-front sound interference and adjustable reference value to filter slight vibration interference, can effectively distinguish real vibration and interference signal, greatly reduce the probability of misjudgment, ensure that detection result is reliable.

The application discloses a pickup method and device of a microphone array, a storage medium and an electronic device, comprising: processing the received signals of all omnidirectional microphones in the microphone array according to the beam coefficients corresponding to the pickup angles to obtain beam signals, and performing beam enhancement on the beam signals to obtain a first signal; performing noise reduction processing on the received signals of all directional microphones in the microphone array to obtain a second signal; calculating a proportional eigenvalue based on the first signal and the second signal; when the proportional eigenvalue is not greater than a first threshold value determined based on a user-indicated pickup distance, calculating a fusion ratio of the first signal and the second signal based on the proportional eigenvalue, and fusing the first signal and the second signal into a pickup signal according to the fusion ratio for output. By applying the application, pickup processing within a limited direction and distance range can be realized, and the accuracy of the pickup signal is improved.