A microphone assembly comprising a housing, a single flexible diaphragm, and a rigid backplate. The backplate may be coated with a parylene configured to help reduce the flatness deviation of the backplate across the diameter of the backplate. A plurality of openings may extend from the top portion of the backplate to the bottom portion of the backplate.

Disclosed is a voice input apparatus including: a panel in which a voice input hole is formed; a circuit board which is disposed below the panel, and has a voice passing hole and a binding hole formed in a position corresponding to the voice input hole; a microphone which is disposed below the circuit board, and provided with a voice receiving hole in a position corresponding to the voice passing hole; and a sealer which guides a voice inputted through the voice input hole to the voice passing hole, wherein the sealer includes: a guide pipe which is formed in a cylindrical shape having a hollow and disposed between the panel and the circuit board, has an upper surface defining an upper end of the hollow is in contact with a bottom surface of the panel while surrounding the voice input hole, and has a lower surface defining a lower end of the hollow is in contact with an upper surface of the circuit board while surrounding the voice passing hole; and a hook which protrudes from the lower surface of the guide pipe and passes through the binding hole to be caught by a bottom surface of the circuit board.

Provided herein is technology relating to measuring weather data and particularly, but not exclusively, to apparatuses, methods, and systems for sensing hydrometeors (e.g., rain) and measuring hydrometeor characteristics (e.g., volume, rate, size distribution, etc.).

An electroacoustic transducer includes a first fixed electrode, a second fixed electrode, and a vibration body. The first and second fixed electrodes face each other across a space. The first fixed electrode includes first protrusions that are provided on a first electrode surface of the first fixed electrode and that protrude toward the second fixed electrode. The first protrusions are arranged at a first arrangement density that varies depending on a position of the first protrusions on the first electrode surface. The second fixed electrode includes second protrusions that are provided on a second electrode surface of the second fixed electrode and that protrude toward the first fixed electrode. The second protrusions are arranged at a second arrangement density that varies depending on a position of the second protrusions on the second electrode surface. The vibration body is sandwiched between the first protrusions and the second protrusions.

Disclosed is a voice input apparatus including: a panel in which a voice input hole is formed; a circuit board which is disposed below the panel, and has a voice passing hole and a binding hole formed in a position corresponding to the voice input hole; a microphone which is disposed below the circuit board, and provided with a voice receiving hole in a position corresponding to the voice passing hole; and a sealer which guides a voice inputted through the voice input hole to the voice passing hole, wherein the sealer includes: a guide pipe which is formed in a cylindrical shape having a hollow and disposed between the panel and the circuit board, has an upper surface defining an upper end of the hollow is in contact with a bottom surface of the panel while surrounding the voice input hole, and has a lower surface defining a lower end of the hollow is in contact with an upper surface of the circuit board while surrounding the voice passing hole; and a hook which protrudes from the lower surface of the guide pipe and passes through the binding hole to be caught by a bottom surface of the circuit board.

A micro-electromechanical transducer including one or more moveable members, and a viscoelastic substance having a predetermined viscoelasticity, the viscoelastic substance being adapted to influence the response of the transducer in a predetermined manner. The micro-electromechanical transducer of the present invention may include a MEMS transducer, such as a MEMS microphone, a MEMS vibration sensor, a MEMS acceleration sensor, a MEMS receiver.

A micro-electromechanical transducer including one or more moveable members, and a viscoelastic substance having a predetermined viscoelasticity, the viscoelastic substance being adapted to influence the response of the transducer in a predetermined manner. The micro-electromechanical transducer of the present invention may include a MEMS transducer, such as a MEMS microphone, a MEMS vibration sensor, a MEMS acceleration sensor, a MEMS receiver.

The present invention discloses a method for producing parametric sound using parametric sound system which is based on ultrasonic electrostatic transducers. It comprises modulation of a carrier ultrasonic signal with a processed audio signal in audio signal processor comprising adaptive frequency filtering based on the audio signal level, dynamic range compression, square root operation, amplification of the modulated ultrasonic signal using a D-class amplifier, driving an electrostatic transducer and generating modulated ultrasonic waves into the air. The electrostatic transducer for the parametric sound system comprises a specific back plate structure that improves electromechanical efficiency of the transducer and also enables realization of a phased array on a single back plate. The disclosed manufacturing method of the electrostatic transducer comprises producing sets of electrodes on the surface of the back plate forming individual cells.

A sensing arrangement for detection of electrical discharges in an electrical apparatus is described. The sensing arrangement includes an acoustic sensor and a signal enhancing structure with a funnel region. The acoustic sensor is positioned outside the funnel region on an apex side of the funnel region. An electrical switchgear is described. The electrical switchgear includes a sensing arrangement for detection of electrical discharges in an electrical apparatus. The sensing arrangement includes an acoustic sensor and a signal enhancing structure with a funnel region.

A sensing arrangement for detection of electrical discharges in an electrical apparatus is described. The sensing arrangement includes an acoustic sensor and a signal enhancing structure with a funnel region. The acoustic sensor is positioned outside the funnel region on an apex side of the funnel region. An electrical switchgear is described. The electrical switchgear includes a sensing arrangement for detection of electrical discharges in an electrical apparatus. The sensing arrangement includes an acoustic sensor and a signal enhancing structure with a funnel region.