Sensor apparatus and methods for operating the same for measuring acceleration are disclosed. In some embodiments, circuitry inside a sensor digitizes a measured acceleration signal from an accelerometer into a digitized acceleration signal, which is processed by a digital equalization filter within the sensor to provide an equalized acceleration signal. The equalized acceleration signal may have a frequency response that is substantially flat over a frequency range that extends beyond the resonant frequency of a MEMs sensor within the accelerometer of the sensor.

Described herein is a MEMS acoustic transducer device provided with a micromechanical detection structure that detects acoustic-pressure waves and supplies a transduced electrical quantity, and with an integrated circuit operatively coupled to the micromechanical detection structure and having a reading module that generates at output an audio signal as a function of the transduced electrical quantity. The integrated circuit is further provided with a recognition module, which recognizes a of sound activity event associated to the transduced electrical quantity. The MEMS acoustic transducer has an output that supplies at output a data signal that carries information regarding recognition of the sound activity event.

Described herein is a MEMS acoustic transducer device provided with a micromechanical detection structure that detects acoustic-pressure waves and supplies a transduced electrical quantity, and with an integrated circuit operatively coupled to the micromechanical detection structure and having a reading module that generates at output an audio signal as a function of the transduced electrical quantity. The integrated circuit is further provided with a recognition module, which recognizes a of sound activity event associated to the transduced electrical quantity. The MEMS acoustic transducer has an output that supplies at output a data signal that carries information regarding recognition of the sound activity event.

An earphone includes a resonance circuit that outputs an adjusted signal obtained by making a signal component of a predetermined frequency contained in an electric signal outputted from a sound source device larger than a signal component of another frequency, a fixed electrode that is fixed to a housing, a diaphragm that is provided facing the fixed electrode and that vibrates according to a potential difference generated between the diaphragm and the fixed electrode on the basis of the adjusted signal, a contact part that contacts a partial region of the diaphragm and presses the partial region against the fixed electrode, and a sound emitting part that emits sound generated by vibration of the diaphragm to the outside of the housing.

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.

A sensor assembly including a capacitive sensor, like a microelectromechanical (MEMS) microphone, and an electrical circuit therefor are disclosed. The electrical circuit includes a first transistor having an input gate connectable to the capacitive sensor, a second transistor having an input gate coupled to an output of the first transistor, a feedforward circuit interconnecting a back-gate of the second transistor and the output of the first transistor, and a filter circuit interconnecting the output of the first transistor and the input gate of the second transistor.

A capacitive microphone includes a substrate, a plurality of stationary electrodes, a diaphragm, and a backplate. The substrate includes a cavity and a step disposed in the cavity, and the plurality of stationary electrodes is equally spaced on the step. A diaphragm is received in the step and includes a vibration portion and a connecting portion connected to the vibration portion. A plurality of movable electrodes protrudes from a periphery of the vibration portion, and one end of the connecting portion away from the vibration portion is connected to the substrate. The backplate is provided with a plurality of sound transmission holes, and a gap is formed between the backplate and the diaphragm to form electrode plates of a variable capacitor. The capacitive microphone can get a higher signal-to-noise ratio, improve the capability of suppressing linear distortion, and improve the anti-interference capability of the microphone.

The present disclosure provides a microphone apparatus. The microphone apparatus may include a microphone and a vibration sensor. The microphone may be configured to receive a first signal including a voice signal and a first vibration signal. The vibration sensor may be configured to receive a second vibration signal. And the microphone and the vibration sensor are configured such that the first vibration signal may be offset with the second vibration signal.

The present invention is a signal processing circuit 12 for an electrostatic electroacoustic transducer configured to correct signals input to a single driven electrostatic electroacoustic transducer 15 including a diaphragm 151 and a fixed electrode 152 disposed to face the diaphragm. The signal processing circuit includes a correction value determiner 122 configured to determine a correction value v1 of a level based on a level of the input signals s1 from the sound source, and a level corrector 124 configured to correct the level of the input signals based on the correction value. The level corrector is configured to correct the level of an input signal among the input signals based on the correction value. The input signal corresponds to a signal for displacing the diaphragm to a first direction side on which a fixed electrode is not disposed with respect to a predetermined position.

The present invention is a signal processing circuit 12 for an electrostatic electroacoustic transducer configured to correct signals input to a single driven electrostatic electroacoustic transducer 15 including a diaphragm 151 and a fixed electrode 152 disposed to face the diaphragm. The signal processing circuit includes a correction value determiner 122 configured to determine a correction value v1 of a level based on a level of the input signals s1 from the sound source, and a level corrector 124 configured to correct the level of the input signals based on the correction value. The level corrector is configured to correct the level of an input signal among the input signals based on the correction value. The input signal corresponds to a signal for displacing the diaphragm to a first direction side on which a fixed electrode is not disposed with respect to a predetermined position.