A system including a work string and an acoustic device for sensing or transmitting an acoustic signal at least partially traveling through a borehole fluid within a wellbore and a method of operation. The acoustic device includes a compensation fluid, an acoustic transducer at least partially disposed in the compensation fluid and configured to sense the acoustic signal, and a metallic cover that separates the compensation fluid from the borehole fluid and configured to deform in response to a pressure difference between the borehole fluid and the compensation fluid. The acoustic device is conveyed into the wellbore and an electric signal is sent or received with the processor to or from the acoustic transducer.

A voice reception device includes a casing and at least two voice reception units. The casing includes a peripheral side wall, a bottom wall, a containing space formed in an inside of the peripheral side wall and the bottom wall, and a first opening end located at an end of the containing space. The voice reception units are disposed in the containing space. Each of the voice reception units includes a main body, a diaphragm, and a voice guiding channel. The main body has a chamber, and an end of the chamber has a second opening end. The diaphragm is connected to the second opening end of the main body. The voice guiding channel includes an importing end acoustically connected to the chamber and an exporting end opposite to the importing end and acoustically connected to a microphone.

A voice reception device includes a casing and at least two voice reception units. The casing includes a peripheral side wall, a bottom wall, a containing space formed in an inside of the peripheral side wall and the bottom wall, and a first opening end located at an end of the containing space. The voice reception units are disposed in the containing space. Each of the voice reception units includes a main body, a diaphragm, and a voice guiding channel. The main body has a chamber, and an end of the chamber has a second opening end. The diaphragm is connected to the second opening end of the main body. The voice guiding channel includes an importing end acoustically connected to the chamber and an exporting end opposite to the importing end and acoustically connected to a microphone.

Systems, methods, and computer-readable media are disclosed for contactless power converter aging detection. An example method may include receiving, from a microphone, first acoustic data associated with a power converter. The example method may also include converting the first acoustic data into second acoustic data, wherein the first acoustic data is time domain data and the second acoustic data is frequency domain data. The example method may also include determining, by a machine learning model and based on the second acoustic data, a remaining useful life value associated with the power converter.

Systems, methods, and computer-readable media are disclosed for contactless power converter aging detection. An example method may include receiving, from a microphone, first acoustic data associated with a power converter. The example method may also include converting the first acoustic data into second acoustic data, wherein the first acoustic data is time domain data and the second acoustic data is frequency domain data. The example method may also include determining, by a machine learning model and based on the second acoustic data, a remaining useful life value associated with the power converter.

A sound pickup device damping structure and a sound pickup apparatus, the sound pickup device damping structure includes: a housing, including a side wall and a peripheral wall connected with the side wall; a circuit board, fixedly connected with the peripheral wall, wherein the circuit board and the side wall and the peripheral wall enclose to form an accommodating chamber; at least one sound pickup component, located in the accommodating chamber and electrically connected with the circuit board; and a first damping layer, disposed between the side wall and the sound pickup component; wherein a second sound pickup hole in the side wall, a hole channel in the first damping layer and a first sound pickup hole disposed in the sound pickup component are communicated with each other.

A sound pickup device damping structure and a sound pickup apparatus, the sound pickup device damping structure includes: a housing, including a side wall and a peripheral wall connected with the side wall; a circuit board, fixedly connected with the peripheral wall, wherein the circuit board and the side wall and the peripheral wall enclose to form an accommodating chamber; at least one sound pickup component, located in the accommodating chamber and electrically connected with the circuit board; and a first damping layer, disposed between the side wall and the sound pickup component; wherein a second sound pickup hole in the side wall, a hole channel in the first damping layer and a first sound pickup hole disposed in the sound pickup component are communicated with each other.

The disclosure generally relates to a conductive layer having one or more protrusions configured to attract an electrostatic discharge (“ESD”) arc. The device may be any device, such as a smartphone, tablet, earbuds, etc. The device may include a microphone and, therefore, may include a microphone opening. The conductive layer may include a conductive opening axially aligned with the microphone opening and one or more protrusions extending radially inwards towards the center of the conductive opening.

A device and method for detecting water leaks in building structures relies on sonic and spectral density analyses of sound distortions caused by a subsurface water leak. Structurally, the device includes a microphone connected with a sound amplifier. Also included is a head set and/or a sound analyzer which are respectively connected with the amplifier. In this combination, the microphone is moved across a surface in the building structure to detect an audio signal that is indicative of a subsurface water leak. This audio signal is then aurally evaluated using the headset to identify a sound distortion relative to white noise, or it is visually evaluated by reference to a spectral density presentation of frequencies on the sound analyzer. Operationally, a location of the water leak is determined by moving the microphone along a search pattern of trace lines over the surface being searched until there is a meaningful response.

A device and method for detecting water leaks in building structures relies on sonic and spectral density analyses of sound distortions caused by a subsurface water leak. Structurally, the device includes a microphone connected with a sound amplifier. Also included is a head set and/or a sound analyzer which are respectively connected with the amplifier. In this combination, the microphone is moved across a surface in the building structure to detect an audio signal that is indicative of a subsurface water leak. This audio signal is then aurally evaluated using the headset to identify a sound distortion relative to white noise, or it is visually evaluated by reference to a spectral density presentation of frequencies on the sound analyzer. Operationally, a location of the water leak is determined by moving the microphone along a search pattern of trace lines over the surface being searched until there is a meaningful response.