A sensor system for detecting water or air in a hollow member comprises a first acoustic sensor assembly in a first housing on one side of the hollow member, a second acoustic sensor assembly in a second housing on the opposite side, a controller unit connected to the first and/or second sensor assemblies, and where the first and second sensor assemblies and the controller unit are provided with power supply. Each of the first and second sensor assemblies comprises a set of probes connected to electronics for transmitting and receiving signals, and where the housings comprise fastening means for connecting the housings and the probes to the hollow member. The controller unit comprises a microcontroller, software for controlling and coordinating transmission and reception of signals between said probes, and means for registering and logging data generated by the sensor assemblies. A method detects water or air in a hollow member.

A sensor system for detecting water or air in a hollow member comprises a first acoustic sensor assembly in a first housing on one side of the hollow member, a second acoustic sensor assembly in a second housing on the opposite side, a controller unit connected to the first and/or second sensor assemblies, and where the first and second sensor assemblies and the controller unit are provided with power supply. Each of the first and second sensor assemblies comprises a set of probes connected to electronics for transmitting and receiving signals, and where the housings comprise fastening means for connecting the housings and the probes to the hollow member. The controller unit comprises a microcontroller, software for controlling and coordinating transmission and reception of signals between said probes, and means for registering and logging data generated by the sensor assemblies. A method detects water or air in a hollow member.

An ear-plug assembly presents audio content to an ear canal of a user. The audio content may be based in part on sound in a local area surrounding the user. The ear-plug assembly detects, via one or more acoustic sensors, sound in the area around the user. The sound waves travel through an aperture in a body of the ear-plug assembly and are propagated to a waveguide to the one or more acoustic sensors. The ear-plug assembly processes the detected sound data in a controller, which instructs a speaker assembly to present audio content based in part on the detected sound data. The detected sounds may be amplified, attenuated, filtered, and/or augmented when presented by the speaker assembly.

A device for manipulating an incident acoustic wave to generate an acoustic output is described wherein the device comprises a plurality of unit cells arranged into an array, at least some of said unit cells being configured to introduce time delays to an incident acoustic wave at the respective positions of the unit cells within the array of unit cells, such that said plurality of unit cells define an array of time delays to thereby define a spatial delay distribution for manipulating an incident acoustic wave to generate an acoustic output. The array of time delays may be re-configured to vary the spatial delay distribution of the device in order to generate different acoustic outputs. Also described are methods for designing or configuring such devices.

An electronic device is provided, and includes a housing, an acoustical component, and a communication support. The housing has an inner cavity, and the acoustical component is disposed in the inner cavity. The housing is provided with a first sound guide channel. The acoustical component is provided with a first installation groove. A bottom wall of the first installation groove is provided with a sound guide opening. The communication support is provided with a second sound guide channel. A first end of the communication support is disposed in the first installation groove. The sound guide opening is in communication with the first sound guide channel through the second sound guide channel. A part, between the housing and the acoustical component, of the communication support, is a flexible connection section.

An electronic device is provided, and includes a housing, an acoustical component, and a communication support. The housing has an inner cavity, and the acoustical component is disposed in the inner cavity. The housing is provided with a first sound guide channel. The acoustical component is provided with a first installation groove. A bottom wall of the first installation groove is provided with a sound guide opening. The communication support is provided with a second sound guide channel. A first end of the communication support is disposed in the first installation groove. The sound guide opening is in communication with the first sound guide channel through the second sound guide channel. A part, between the housing and the acoustical component, of the communication support, is a flexible connection section.

A positionable exhaust apparatus with an exhaust outlet having a first bore extending along a length of the exhaust outlet. The first bore having a longitudinal axis extending the length thereof and an exhaust outlet tip coupled to the exhaust outlet. The exhaust outlet tip having a second bore with at least a portion of the second bore substantially aligned with the first bore of the exhaust outlet. An actuator coupled with the exhaust outlet and the exhaust outlet tip with at least a portion of the exhaust outlet tip to rotate the exhaust outlet tip relative to the exhaust outlet. The exhaust outlet tip rotatable three hundred and sixty degrees about the longitudinal axis of the exhaust outlet.

A positionable exhaust apparatus with an exhaust outlet having a first bore extending along a length of the exhaust outlet. The first bore having a longitudinal axis extending the length thereof and an exhaust outlet tip coupled to the exhaust outlet. The exhaust outlet tip having a second bore with at least a portion of the second bore substantially aligned with the first bore of the exhaust outlet. An actuator coupled with the exhaust outlet and the exhaust outlet tip with at least a portion of the exhaust outlet tip to rotate the exhaust outlet tip relative to the exhaust outlet. The exhaust outlet tip rotatable three hundred and sixty degrees about the longitudinal axis of the exhaust outlet.

Passively controlled acoustic metamaterials allow transmission of low amplitude acoustic (sound) waves having a resonance frequency and reflect waves having a substantially different frequency. Such materials also reflect waves having the resonance frequency when those waves have an amplitude exceeding a threshold. High amplitude resonance waves cause a resonance membrane contained in unit cells of the metamaterial to contact a rigid structure that is positioned at a longitudinal constraint distance from the resonance membrane in each unit cell. Such contact changes the resonance frequency of the membrane, thereby causing reflection of high amplitude waves. Actively controlled acoustic metamaterials include a ferromagnetic layer on the membrane and an electromagnetic positioned in each unit cell. Activation of the electromagnetic displaces the membrane and thereby shifts the resonance frequency of the membrane, on demand.

Passively controlled acoustic metamaterials allow transmission of low amplitude acoustic (sound) waves having a resonance frequency and reflect waves having a substantially different frequency. Such materials also reflect waves having the resonance frequency when those waves have an amplitude exceeding a threshold. High amplitude resonance waves cause a resonance membrane contained in unit cells of the metamaterial to contact a rigid structure that is positioned at a longitudinal constraint distance from the resonance membrane in each unit cell. Such contact changes the resonance frequency of the membrane, thereby causing reflection of high amplitude waves. Actively controlled acoustic metamaterials include a ferromagnetic layer on the membrane and an electromagnetic positioned in each unit cell. Activation of the electromagnetic displaces the membrane and thereby shifts the resonance frequency of the membrane, on demand.