Provided is a sensor interface including a first cantilever beam bundle including at least one resonator and a first output terminal, a second cantilever beam bundle including at least one resonator and a second output terminal, and a differential amplifier including a first input terminal electrically connected to the first output terminal of the first cantilever beam bundle and a second input terminal electrically connected to the second output terminal of the second cantilever beam bundle.

Provided is a sensor interface including a first cantilever beam bundle including at least one resonator and a first output terminal, a second cantilever beam bundle including at least one resonator and a second output terminal, and a differential amplifier including a first input terminal electrically connected to the first output terminal of the first cantilever beam bundle and a second input terminal electrically connected to the second output terminal of the second cantilever beam bundle.

The present disclosure provides an acoustic output apparatus. The acoustic output apparatus may include a vibration assembly and a mass element. The vibration assembly may include a piezoelectric structure and a vibration element. The piezoelectric structure may be configured to convert an electrical signal into mechanical vibrations, and the vibration element may be connected to the piezoelectric structure at a first position of the piezoelectric structure and configured to receive the mechanical vibrations to generate an acoustic signal. The mass element may be connected to the piezoelectric structure at a second position of the piezoelectric structure.

The present disclosure provides an acoustic output apparatus. The acoustic output apparatus may include a vibration assembly and a mass element. The vibration assembly may include a piezoelectric structure and a vibration element. The piezoelectric structure may be configured to convert an electrical signal into mechanical vibrations, and the vibration element may be connected to the piezoelectric structure at a first position of the piezoelectric structure and configured to receive the mechanical vibrations to generate an acoustic signal. The mass element may be connected to the piezoelectric structure at a second position of the piezoelectric structure.

A contact sensor for the repeatable detection of small, high frequency mechanical vibrations in external systems is presented herein. The sensor includes a metal housing with an attachment device at one end and an output at the other end. Inside the metal housing is a core assembly that includes a piezo transducer assembly suspended or isolated between an actuator and a biasing device. The actuator may be in the form of a ceramic sphere that sits at least partially within a recess on the inside of the housing and is in physical contact with the piezo transducer assembly. The biasing device may be in the form of a spring that causes the piezo transducer assembly to be pressed against the actuator at a contestant and known amount of tension.

A contact sensor for the repeatable detection of small, high frequency mechanical vibrations in external systems is presented herein. The sensor includes a metal housing with an attachment device at one end and an output at the other end. Inside the metal housing is a core assembly that includes a piezo transducer assembly suspended or isolated between an actuator and a biasing device. The actuator may be in the form of a ceramic sphere that sits at least partially within a recess on the inside of the housing and is in physical contact with the piezo transducer assembly. The biasing device may be in the form of a spring that causes the piezo transducer assembly to be pressed against the actuator at a contestant and known amount of tension.

An acoustic device, comprising: a device body comprising: an acoustic membrane having a first surface and a second surface opposite the first surface; and at least one acoustic cavity formed adjacent the first surface of the acoustic membrane; a plurality of piezoelectric beam resonators supported over the first surface of the acoustic membrane and separated from the first surface by the at least one acoustic cavity, each of the plurality of piezoelectric beam resonators having at least one different natural frequency; wherein each of the plurality of piezoelectric beam resonators is configured to oscillate in response to sound pressure waves incident at the acoustic device.

An acoustic device, comprising: a device body comprising: an acoustic membrane having a first surface and a second surface opposite the first surface; and at least one acoustic cavity formed adjacent the first surface of the acoustic membrane; a plurality of piezoelectric beam resonators supported over the first surface of the acoustic membrane and separated from the first surface by the at least one acoustic cavity, each of the plurality of piezoelectric beam resonators having at least one different natural frequency; wherein each of the plurality of piezoelectric beam resonators is configured to oscillate in response to sound pressure waves incident at the acoustic device.

An in-ear receiver can be used in a headset and/or hearing aid and includes a housing in which at least one ear canal section is configured to be inserted into an ear canal of a wearer when the in-ear receiver is used as intended. The housing defines at least one outer contour that is configured with at least in one section adapted to the ear canal of the wearer. The in-ear receiver includes a sound transducer arranged in the housing, and at least one resonant cavity, which is formed in the housing and is divided by the sound transducer into a front volume and a rear volume. The sound transducer is a MEMS sound transducer, and the front volume and/or the rear volume have/has an inner contour adapted to the ear canal.

A sound transducer and a method for operating a sound transducer are disclosed. In an embodiment a sound transducer includes a first piezoelectric element having first external electrodes configured to generate an acoustic signal from an electrical signal or vice versa, and at least one second external electrode, wherein the second external electrode is separately controllable from the first external electrodes in order to set electro-acoustic properties of the sound transducer.