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 apparatus may include a display panel configured to display an image, a vibration apparatus disposed at a rear surface of the display panel to vibrate the display panel, wherein the vibration apparatus includes a plurality of vibration structures, and a pad member disposed outside or inside the vibration apparatus.

An apparatus may include a display panel configured to display an image, a vibration apparatus disposed at a rear surface of the display panel to vibrate the display panel, wherein the vibration apparatus includes a plurality of vibration structures, and a pad member disposed outside or inside the vibration apparatus.

The actuator includes a magnetic drive mechanism to relatively move the movable body with respect to the support body. The magnetic drive mechanism has a magnet and a coil. The connecting element connected to the support body and the movable body is a viscoelastic member. The viscoelastic member has a temperature characteristic that a loss tangent (Tan δ) thereof measured by a dynamic viscoelasticity measurement decreases as a temperature rises. When using a silicone gel as the connecting element, the decrease in the peak value of the acceleration of the movable body caused by the decrease in the current flowing through the coil is cancelled by the increase in the peak value of the acceleration of the movable body caused by the decrease in Tan δ of the silicone gel. Therefore, the oscillation of the movable body is unchanged even if a temperature changes.

A device to transmit an audio signal comprises at least one light source configured to transmit the audio signal with at least one wavelength of light. At least one detector is configured to detect the audio signal and generate at least one electrical signal in response to the at least one wavelength of light. A transducer is supported with and configured to vibrate at least one of an eardrum, an ossicle or a cochlea. Active circuitry is coupled to the transducer to drive the transducer in response to the at least one electrical signal, so as to provide the user with high quality sound.

Described herein are methods and systems of distributed acoustic sensing, such as in an urban or metropolitan area involving a dedicated and established fibre optic communications network including a data centre. In general, the disclosed method and system includes the steps of (a) selecting an optical fibre cable installation having a path extending across a selected geographical area, the optical fibre cable installation including a bundle of optical fibres and forming part of a fibre-optic communications network, (b) determining characteristics associated with the optical fibre and/or the selected optical fibre installation, (c) transmitting outgoing light in the optical fibre, (d) receiving reflected light back scattered along the optical fibre, and (e) based on the reflected light and the determined characteristics, generating an alert signal representative of an acoustic event. The disclosed method and system are applied to detect acoustic events near or within the selected geographical area.

An optical microphone includes a housing, a diaphragm provided in the housing, a first light source provided within the housing, a first light receiving element provided within the housing, a detection unit that detects an output of the first light receiving element, and a control unit that switches a control mode from a first control mode to a second control mode according to a determination result of an abnormal state by the detection unit.

An air-pulse generating device includes a film structure. The film structure is driven by a modulation-driving signal, so as to form an amplitude-modulated ultrasonic air pressure variation with an ultrasonic carrier frequency. The film structure is driven by a first demodulation-driving signal and a second demodulation-driving signal, so as to form an opening at a rate synchronous with the ultrasonic carrier frequency. The air-pulse generating device produces a plurality of air pulses according to the amplitude-modulated ultrasonic air pressure variation.

An air-pulse generating device includes a film structure. The film structure is driven by a modulation-driving signal, so as to form an amplitude-modulated ultrasonic air pressure variation with an ultrasonic carrier frequency. The film structure is driven by a first demodulation-driving signal and a second demodulation-driving signal, so as to form an opening at a rate synchronous with the ultrasonic carrier frequency. The air-pulse generating device produces a plurality of air pulses according to the amplitude-modulated ultrasonic air pressure variation.

In, for example, the overly vast ocean, it would be economically impossible to use common sensors to construct a sensor network for capturing a rare phenomenon. This invention addresses the problem of providing an unconfirmed sound extraction device, and the like, for facilitating the monitoring of sound caused by an infrequently occurring phenomenon. This unconfirmed sound extraction device comprises an unconfirmed sound extraction unit for extracting, from sound data that has been acquired using an optical fiber and is related to sound at various positions on the optical fiber, unconfirmed sound information representing unconfirmed sound data, which is of the sound data and is on a sound having a cause that cannot be estimated, at a sound data acquisition time and location, and an output unit for outputting the unconfirmed sound information.