An integrated optical transducer for detecting dynamic pressure changes comprises a micro-electro-mechanical system, MEMS, die having a MEMS diaphragm with a first side exposed to the dynamic pressure changes and a second side. The transducer further comprises an application specific integrated circuit, ASIC, die having an evaluation circuit configured to detect a deflection of the MEMS diaphragm, in particular of the second side of the MEMS diaphragm. The MEMS die is arranged with respect to the ASIC die such that a gap with a gap height is formed between the second side of the diaphragm and a first surface of the ASIC die and the MEMS diaphragm, the ASIC die and a suspension structure of the MEMS die delineate a back volume of the integrated optical transducer.

An optical network element includes a connection to an optical fiber in an optical line system including a coherent receiver; a microphone configured to detect sound; and circuitry connected to the microphone and configured to cause transmission of information related to sounds detected by the microphone to a receiver at an end of the optical line system, wherein the transmission is over the optical fiber in the optical line system to the coherent receiver. The optical network element can include a polarization controlling device connected to the circuitry and configured to modulate a state-of-polarization (SOP) envelope for the transmission.

The sound detection device comprises a substrate, an array of sound detectors in or on a surface of the substrate, a processing circuit coupled to the sound detectors, the processing circuit being configured to sum signals from the sound detectors with relative time delays or phase shifts that compensate for propagation delay of sound along the array in a sound propagation mode that is bound to said surface. In an embodiment the sound in said sound propagation mode is bound to the surface using an acoustic waveguide, wherein the surface of the substrate forms a part of the acoustic waveguide, the sound detection device comprising a wall facing the array of sound detectors, with a space between the surface of the substrate and the wall, the sound detection device comprising an opening that provides incoming sound from outside the device access to said space, for excitation of the wave in the bound propagation mode in the acoustic waveguide by sound from outside the device.

An assembly (1) for measuring a relative humidity level inside a watch (2), the watch (2) provided with a movement (10) and a device (4) for determining the humidity level present in the enclosure (9) of a case (3) of this watch (2). The determination device (4) includes a receiver module (6a, 6b, 6c) for receiving at least one acoustic signal from a timepiece component (11) of said movement (10), and a control unit (7) connected to said receiver module (6a, 6b, 6c). The control unit (7) is configured to run a model for evaluating a water vapour content of a gaseous fluid contained inside the enclosure (9) based on the at least one acoustic signal received by the receiver module (6a, 6b, 6c).

An in-line filter uses scalar coils positioned in series with an input of a speaker to modify or enhance the audio quality and of the speaker, and its auditory effects on a user, by changing the sound signature and reducing digital noise. Scalar coils have two spiral windings with opposite winding directions. Scalar coils can also be used in series with a laser emitter that produces a laser beam that travels through the scalar coil, which produce electromagnetic forces that improve perceived audio quality in a user.

A voice activation system for a vehicle. The voice activation system for a vehicle which has at least one sound panel capable of providing vibrations of a user's voice from the outside of the vehicle into an inside area of the vehicle. A laser listening device is operably connected to the panel for receiving vibrations from a user's voice. A controller receives a pre-identified command of the user from the laser listener and operates an action in the vehicle in response thereto.

Provided is a sensor package with an integrated circuit embedded in a substrate and a sensor die on the substrate. The substrate includes a molding compound that has additives configured to respond to a laser. The integrated circuit is embedded in the molding compound. An opening is through the substrate and is aligned with the sensor die. A lid covers the sensor die and the substrate, forming a cavity. At least one trace is formed on a first surface of the substrate, on an internal sidewall of the opening and on a second surface of the substrate with a laser direct structuring process.

A signal processing method and device of a MEMS microphone and a MEMS microphone are disclosed. The method comprises: acquiring a first electrical signal obtained by converting a received optical signal by an optical sensor disposed near a sound hole of the MEMS microphone; acquiring a second electrical signal output by the MEMS microphone; and judging that the second electrical signal is an interference signal when within a substantially overlapping time range, the first electrical signal acquired reaches a preset first threshold value and the second electrical signal acquired meets a preset condition.

An electronic device includes a microphone, an array of coherent optical emitters, an array of balanced coherent optical vibration sensors, and a processor. Each balanced coherent optical vibration sensor in the array of balanced coherent optical vibration sensors is paired with a coherent optical emitter in the array of coherent optical emitters. The processor is configured to analyze a set of waveforms acquired by the array of balanced coherent optical vibration sensors; identify, using the analysis of the set of waveforms, a set of one or more voices in a field of view; and adjust an output of the microphone to accentuate a particular voice in the set of one or more voices.

An optical device for an optical sensor comprises a gain element of a semiconductor laser, a wavelength selective feedback element, and a sensing element. At least part of the wavelength selective feedback element and the sensing element are arranged in a common sensor package. The gain element is arranged to generate and amplify an optical signal. The gain element and the wavelength selective feedback element form at least part of an external cavity of the semiconductor laser, thereby providing a feedback mechanism to sustain a laser oscillation depending on the optical signal. The wavelength selective feedback element is arranged to couple out a fraction of the optical signal and direct said fraction of the optical signal towards the sensing element to probe a physical property of the sensing element.