Embodiments of the present disclosure provide an acoustic output device comprising: a vibration element having a beam structure extending along a length direction of the vibration element; a piezoelectric element configured to deform in response to an electrical signal, the deformation of the piezoelectric element driving the vibration element to vibrate, wherein the piezoelectric element is attached to a first position of the beam structure, and a size of an attachment area along the length direction does not exceed 80% of a size of the beam structure along the length direction; and a mass element connected to a second position of the beam structure, wherein the first position and the second position are spaced apart along the length direction, and the vibration of the vibration element drives the mass element to vibrate in a direction perpendicular to the length direction.

Embodiments of the present disclosure provide an acoustic output device comprising: a vibration element having a beam structure extending along a length direction of the vibration element; a piezoelectric element configured to deform in response to an electrical signal, the deformation of the piezoelectric element driving the vibration element to vibrate, wherein the piezoelectric element is attached to a first position of the beam structure, and a size of an attachment area along the length direction does not exceed 80% of a size of the beam structure along the length direction; and a mass element connected to a second position of the beam structure, wherein the first position and the second position are spaced apart along the length direction, and the vibration of the vibration element drives the mass element to vibrate in a direction perpendicular to the length direction.

The present disclosure discloses a sensing device, comprising a sensor configured to convert a sound signal into an electrical signal, the sensor having a first resonant frequency; and a resonant system including a vibration pickup unit and configured to generate a vibration in response to a vibration of a housing of the sensing device. The vibration pickup unit may include at least an elastic diaphragm and a mass block. The elastic diaphragm may be connected to the housing the sensing device through a peripheral side of the elastic diaphragm. The mass block may be at least made of a polymer material. A first acoustic cavity may be defined between the elastic diaphragm and the sensor. When the housing of the sensing device generates a vibration in response to an external sound signal, the elastic diaphragm and the mass block may generate a vibration in response to the vibration of the housing of the sensing device. The elastic diaphragm may cause a sound pressure change in the first acoustic cavity during a vibration process, and the sensor may convert the external sound signal into an electrical signal based on the sound pressure change in the acoustic cavity. The resonant system may provide at least one second resonant frequency to the sensing device. The second resonant frequency may be lower than the first resonant frequency.

The embodiments of the present disclosure provide a sensor device, including: a sensor assembly with a first resonant frequency and a sound pickup assembly configured to communicate with an external sound of the sensor device through a sound inlet, wherein an acoustic cavity may be formed between the sound pickup assembly and the sensor assembly, when the sound pickup assembly vibrates in response to an air conduction sound transmitted through the sound inlet, vibrations of the sound pickup assembly may change a sound pressure in the acoustic cavity, and the sensor assembly may convert the air conduction sound into an electrical signal based on changes of the sound pressure in the acoustic cavity, wherein the sound pickup assembly may provide the sensor device with a second resonant frequency, and a difference between the second resonant frequency and the first resonant frequency may be in a range of 1000 Hz-10000 Hz.

The present disclosure provides a sensing device, comprising: a housing, an accommodation cavity being provided inside the housing; a transduction unit, including a vibration-pickup structure used to pick up vibration of the housing to generate an electrical signal, wherein the transduction unit divides the accommodation cavity into a front cavity and a rear cavity located on opposite sides of the vibration-pickup structure, at least one of the front cavity or the rear cavity is filled with liquid, and the liquid is in contact with the vibration-pickup structure; and one or more pipeline structures, each pipeline structure being configured to connect the accommodation cavity to an outside of the housing, the liquid being at least partially located in the one or more pipeline structures.

One of the embodiments of the present disclosure provides a sensor device, including: a housing and a transducer unit, wherein the housing has an accommodating cavity inside, the transducer unit includes a vibration pickup structure configured to pick up a vibration of the housing and produce an electrical signal, and the transducer unit in the accommodating cavity separates the accommodating cavity to form a front cavity and a rear cavity on opposite sides of the vibration pickup structure. At least one cavity of the front cavity and the rear cavity is filled with liquid, the liquid is in contact with the vibration pickup structure, and an air cavity is formed between the liquid and the housing.

An ultrasound energy delivery system is provided that includes a transducer and a housing.

An ultrasound energy delivery system is provided that includes a transducer and a housing.

The document describes systems and methods for handling local (legacy) devices. A local cloud gateway comprises a plurality of interface connectors of different types to physically connect a plurality of these legacy devices to the cloud, comprising a plurality of distant servers. Developments describe the step of extracting the functional messages out of messages stemming from local legacy devices (e.g. protocol translators), secure communications, logical representations of legacy devices in the cloud (“twins”), administration options, various user interfaces (e.g. buzzer) for seamless configuration and use, the use of one or more actuators (retroactions on the physical world), etc. Software and/or hardware embodiments are described.

The document describes systems and methods for handling local (legacy) devices. A local cloud gateway comprises a plurality of interface connectors of different types to physically connect a plurality of these legacy devices to the cloud, comprising a plurality of distant servers. Developments describe the step of extracting the functional messages out of messages stemming from local legacy devices (e.g. protocol translators), secure communications, logical representations of legacy devices in the cloud (“twins”), administration options, various user interfaces (e.g. buzzer) for seamless configuration and use, the use of one or more actuators (retroactions on the physical world), etc. Software and/or hardware embodiments are described.