A microelectromechanical system (MEMS) transducer includes a transducer substrate, a diaphragm, and a stiffening member. A first side of the diaphragm is coupled to the transducer substrate. A second side of the diaphragm is coupled to the stiffening member. The stiffening member includes a plurality of fingers extending inwards from a perimeter of an aperture defined by the transducer substrate.

A microphone unit includes: an audio data acquisition unit that acquires speech as audio data; an audio data registration unit that registers verification audio data obtained by extracting a feature point from the audio data; an evaluation audio data acquisition unit that acquires speech that is input to a first microphone as evaluation audio data; a verification unit that verifies whether or not a speaker who uttered speech that is based on the evaluation audio data is a speaker who uttered speech that is based on the verification audio data, based on the verification audio data and a feature point extracted from the evaluation audio data; and a verification result output unit that outputs a result of verification performed by the verification unit.

A differential MEMS-readout circuit comprises a first input bonding pad, including a first contact pin and a second contact pin. The differential MEMS-readout circuit comprises a second input bonding pad, including a first contact pin and a second contact pin; and a differential-readout amplifier section comprising a first input connected to the first contact pin of the first input bonding pad and a second input connected to the first contact pin of the second bonding pad, wherein the differential-readout amplifier section comprises a first and a second transistor circuit and each of the second contact pins of the first and second input bonding pads is coupled to one of the first and the second transistor circuits or is coupled to one of the first and the second transistor circuits and/or to ground.

The present application relates to graphene-based transducing devices, including micromechanical ultrasonic transducers and electret transducers. A micromachined ultrasonic transducer comprising: a backing layer, a spacer layer, and a diaphragm comprising a material selected from the group consisting of graphene, h-BN, MoS2, and combinations thereof, wherein the backing layer comprises a first etched semiconductor, glass, or polymer, wherein the spacer layer comprises a second etched semiconductor, glass, or polymer.

One of the main objects of the present invention is to provide a MEMS speaker with improved high frequency acoustic performance. To achieve the above-mentioned object, the present invention provides a MEMS speaker including a base with a first cavity and two openings opposite to each other; a substrate covering one of the openings; a diaphragm fixed to the base and covers the other opening; and a MEMS driver. The MEMS driver includes a first support part forming a distance from the diaphragm, a second support part extending from an edge of the first support part toward the diaphragm for supporting the diaphragm, and a piezoelectric member attached to the first support part.

One of the main objects of the present invention is to provide a MEMS acoustic sensor with improved acoustic performance and liability. To achieve the above-mentioned objects, the present invention provides a MEMS acoustic sensor, including: a base with a cavity; a number of structural layers fixed on the base, each including a fixed end fixed to the base and a suspension end extending from the fixed end for being suspended above the cavity, the suspension end being spaced from the base for forming a slit; a piezoelectric functional layer on the suspension end; and a flexible connector completely covering the slit; wherein a Young's modulus of the flexible connector is smaller than a Young's modulus of the structural layer.

A wearable stethoscope includes a sound sensing device for collecting heart sound signals of the body, an electrocardiogram sensing device for collecting electrocardiogram signals of the body, a processing unit, powered by a power source, coupled to the sound sensing device and the electrocardiogram sensing device to perform data preprocessing on the above-mentioned signals to remove background noise. An external electronic computing device is set up to analyze and process the fed pre-processed ECG signal and heart sound signal, perform feature extraction in combination with the user's physiological parameters and medical records to obtain related feature vectors, input the feature vectors into a screening model, obtain an evaluation value and give corresponding suggestions. After screening, users can upload the verification results to the cloud database to expand the existing training samples for further optimizing the parameters of the screening model.

A MEMS microphone includes a substrate having a cavity, a diaphragm disposed above the substrate to correspond to the cavity, and a back plate disposed above the diaphragm. The diaphragm includes a concave-convex structure, and the back plate includes a second concave-convex structure corresponding to the concave-convex structure.

Provided are a directional acoustic sensor that detects a direction of sound, a method of detecting a direction of sound, and an electronic device including the directional acoustic sensor. The directional acoustic sensor includes a sound inlet through which a sound is received, a sound outlet through which the sound received through the sound inlet is output, and a plurality of vibration bodies arranged between the sound inlet and the sound outlet, in which one or more of the plurality of vibration bodies selectively react to the sound received by the sound inlet according to a direction of the received sound.

An audio processing system includes at least one first microphone, at least one adaptive filter, and a processor. The at least one first microphone acquires a first audio signal and outputs a first signal based on the first audio signal. The first audio signal includes at least one of a first audio component generated at a first position and a second audio component generated at a second position different from the first position. The first signal is input to the at least one adaptive filter. The at least one adaptive filter outputs a passing signal based on the first signal. The processor, when executing a program stored in a memory, performs: making a determination of which of the first audio component and the second audio component the first audio signal includes more; and controlling a filter coefficient of the adaptive filter based on a result of the determination.