A vibrating panel assembly configured to radiate sound into a passenger compartment of a vehicle having a support structure is provided. The assembly includes a substrate panel having front and back surfaces. The panel includes an inner portion, an outer boundary portion formed on the perimeter of the panel and an intermediate portion between the inner portion and the outer boundary portion. The vibrating panel has a frequency distribution of modes in a range of audible frequencies. The panel is configured to be attached to the support structure. An electroacoustic vibrator is mounted on the inner portion at the back surface at a predetermined location and is configured to vibrate the panel over the range of audible frequencies in response to an electrical signal. The intermediate portion is configured to increase modal density of the panel.

A capacitive transducer or microphone includes a first substrate of one or more layers and which includes a first surface, a first cavity in the first surface, and a mesa diaphragm that spans the first cavity. The capacitive transducer or microphone includes a second substrate fixed to the first substrate. The second substrate has one or more layers which includes a second cavity having a nonplanar (e.g., contoured or structured or stepped) bottom surface that faces the mesa diaphragm. A shape or relief of the bottom surface of the cavity may advantageously be, to at least some degree, complementary to a deformed shape of the diaphragm. The second substrate may include one or more acoustic holes, non-uniformly distributed thereacross. One or more vents may vent the second cavity.

One of the main objects of the present invention is to provide a speaker with optimized overall acoustic performance. To achieve the above-mentioned object, the present invention provides a speaker including: a base with an accommodation cavity; a vibration sounding assembly accommodated in the accommodation cavity, including a first diaphragm and a second diaphragm, and a driver fixed to the first diaphragm for driving the first diaphragm and the second diaphragm to vibrate and produce sound. The second diaphragm stacks on the first diaphragm, and a stiffness of the second diaphragm is different from a stiffness of the first diaphragm.

One of the main objects of the present invention is to provide a speaker with optimized overall acoustic performance. To achieve the above-mentioned object, the present invention provides a speaker including: a base with an accommodation cavity; a vibration sounding assembly accommodated in the accommodation cavity, including a first diaphragm and a second diaphragm, and a driver fixed to the first diaphragm for driving the first diaphragm and the second diaphragm to vibrate and produce sound. The second diaphragm stacks on the first diaphragm, and a stiffness of the second diaphragm is different from a stiffness of the first diaphragm.

Provided is a vibration panel including an inner member, a first outer member, a second outer member, a piezoelectric actuator, an actuator bonding layer, and a filler. The inner member includes first and second main surfaces. The first outer member includes third and fourth main surfaces, the third main surface including a first region and a second region. The second outer member includes fifth and sixth main surfaces, the fifth main surface including a third region and a fourth region. The piezoelectric actuator causes vibration. The actuator bonding layer is disposed between the piezoelectric actuator and the second region and bonds the piezoelectric actuator to the second region. The filler fills a space between the second region and the fourth region and covers the piezoelectric actuator.

A piezoelectric microelectromechanical systems device is provided, having a first piezoelectric layer, a first metal layer including a first metal, a second metal layer including a second metal, the first and second metals having different properties to compensate deflection due to thermal stress of any or all of the piezoelectric layer, the first metal layer, and second metal layer and a substrate including at least one wall defining a cavity and the at least one wall supporting the layers. The method for making the piezoelectric microelectromechanical systems device is also provided.

The present disclosure provides a speaker vibration assembly and speaker. The speaker vibration assembly driven by a speaker driving module to vibrate, which comprises a first frame body, a vibrating diaphragm, and a plurality of covering members. The first frame body comprises a hollow part. The vibrating diaphragm is disposed at the first frame body and covers the hollow part. The vibrating diaphragm comprises a plurality of first openings. The plurality of covering members are disposed at the vibrating diaphragm and respectively cover the plurality of first openings. Each of the covering members comprises a plurality of through holes. The speaker comprises a speaker vibration assembly according to the above description and a driving module. The driving module is connected with the first frame body and driving the first frame body to vibrate.

A piezoelectric film laminated body includes a metal film, an amorphous film, and a scandium aluminum nitride film. The amorphous film has an insulation property and is disposed on the metal film. The scandium aluminum nitride film is disposed on the amorphous film and is in contact with a surface of the amorphous film.

The invention provides a diaphragm for a microspeaker and a manufacturing method thereof. The diaphragm is a single-layer diaphragm or a multi-layer diaphragm and comprises at least one layer of a chemically cross-linked thermoplastic polyester elastomer, wherein: the chemically cross-linked thermoplastic polyester elastomer has a loss factor less than or equal to 0.4 at a temperature range not higher than a softening temperature of thermoplastic polyester elastomer before chemical crosslinking plus 40° C., as measured by a rheological curve; and the diaphragm further has a yield strain in the range of 7% to 30%. The diaphragm for a microspeaker according to the technical solution of the present invention is easy to be prepared by thermoforming, and has appropriate modulus, good strength, elasticity, and thermal stability.

Provided is a mounting component held so as to be capable of attachment and detachment by a mounting machine. The mounting component includes a membrane support, a vibrating membrane connected to the membrane support and displaceable in a membrane thickness direction, and a contact member that is located on the membrane support and is subjected to an upward attractive force by the mounting machine without generating stress leading to shape deformation or breakage of the vibrating membrane during the attachment and detachment.