The electrical device is an electrical device that is mounted on a wall of a building, the electrical device including: an actuator that vibrates; and absorbing member that absorbs vibration of the actuator and is positioned behind the actuator in a predetermined direction, where a direction from a back side to a front side of the wall is defined as a direction toward a front in the predetermined direction in a state where the electrical device is mounted on the wall.

An electronic device may include: a housing including a front plate oriented in a first direction, a rear plate oriented in a second direction opposite the first direction, and a side member enclosing at least a part of a space between the front plate and the rear plate. The electronic device further including a display disposed to be visible through the front plate; a printed circuit board disposed between the display and the rear plate; a support structure having a first face oriented in the first direction and supporting the display and a second face oriented in the second direction and supporting the printed circuit board; a conductive member disposed between the support structure and the rear plate; and a sealing structure disposed between the conductive member and the rear plate, the sealing structure extending along a periphery of the conductive member and formed in a closed curve shape.

The present invention relates to a loudspeaker including a uniform enclosure having front portion, side portions and back portion defining an inner volume, the front portion is formed as a waveguide surface and includes at least one driver in the waveguide surface and is capable of radiating the main acoustic power of the loudspeaker to direction of first acoustic axis, and an at least one additional driver attached to the enclosure, the additional driver is attached inside the enclosure such that a sub volume is formed inside the inner volume, the sub volume limited by the driver, spacers between the driver and the front portion, and the front portion of the enclosure, at least one first port is adapted to open from the sub volume to ambient volume either to side portion or back portion of the enclosure, and at least one resonator including at least one resonator cavity acoustically connected to the sub volume, the resonator being tuned to at least one of unwanted resonances of the sub volume. In accordance with the invention the resonator is formed as a separate unit connected to the uniform enclosure.

Aspects are disclosed of an acoustically active coating. The coating is a porous coating having a thickness and including between 2% and 30% by mass of a binder and between 70% and 98% by mass of a zeolite. The coating comprises a plurality of convex shapes connected by concave connectors and has a distribution of pore sizes. Other embodiments are disclosed and claimed.

A micrometric speaker includes a frame, an electromechanical transducer, and a mechanical-acoustic transducer comprising a rigid plate movably mounted in the frame. The electromechanical transducer comprises two piezoelectric actuators and two elastic strips. The frame comprises a central crossmember from which the two strips extend until engaging two lateral coupling edges of the mechanical-acoustic transducer, and the mechanical-acoustic transducer comprises two linearising springs each extending from one of the lateral edges to the rigid plate, to enable, during a deformation of the strips, a movement of the two lateral edges to the central crossmember and reduce the longitudinal constraints applied to the strips during their deformation due to their “recessed-guided” bending configuration.

A speaker device includes a bass driver mounted in the internal space of an enclosure for generating a bass output. The bass driver has a central axis along which a piston area of the bass driver actuates oriented at an oblique angle relative to the bottom end of the enclosure to increase bass driver size and acoustic output and to reduce acoustic frequency distortion by providing a varying distance between the bass driver and the top and bottom ends of the enclosure. An elastomeric reflector-damper plate is spaced apart from the bass driver in the internal space in the enclosure. The reflector-damper plate radially disperses low to midrange audio frequencies of the bass output of the bass driver around the enclosure to further reduce acoustic frequency distortion. Electronic subsystems in the internal space coupled to the bass driver receive and process input audio signals to be rendered by the bass driver.

An audio device uses a multi-way speaker device, an ideal state being when the virtual sound source points of each unit group overlap and the spherical surface of the wavefront of the sound output from each speaker unit group overlaps one spherical surface. In order for the virtual sound source points of each unit group to be close to each other so that the wavefront of the sound output from each unit group is approximated to one spherical surface. A positioning a placement position of the speaker unit group having relatively small diameters rearward from a viewing position with respect to a placement position of the speaker unit group having relatively large diameters, and/or making the number of speaker units constituting the speaker unit group having relatively small diameters larger than the number of speaker units constituting the speaker unit group having relatively large diameters is adopted.

This application provides a speaker and a mobile terminal. The speaker includes a housing and a kernel located in the housing, where there is a front cavity and a rear cavity in the housing, the front cavity is in communication with the outside, and the rear cavity is an isolated cavity. In addition, to reduce a space area occupied by the entire speaker, the front cavity and the rear cavity are disposed in a stacked manner when being disposed. Specifically, the front cavity and the rear cavity are at least partially stacked along a thickness direction of the kernel. Therefore, the rear cavity is disposed in space of the entire speaker in the thickness direction of the kernel, to reduce an area occupied by the entire speaker in the mobile terminal on the premise that a size of the rear cavity meets a requirement.

In various embodiments, an electronic device includes: a diaphragm, a speaker module including a speaker configured to output a sound through a vibration of the diaphragm, and a housing accommodating the diaphragm and the speaker module therein and including a first space provided in a first direction from the speaker module and a second space provided in a second direction opposite the first direction. The electronic device further includes an air adsorption member comprising an air adsorbing material disposed in the first space and having a volume ratio of 90% or less of the first space, the air adsorption member configured to reduce air resistance to the diaphragm disposed above the speaker module without limiting the vibration of the diaphragm.

The present disclosure discloses a sounding device including a frame, a vibration system, a magnetic circuit system, and an air-permeable mesh in a ring shape. The vibration system includes a diaphragm and a voice coil. The magnetic circuit system includes a yoke, a first magnet, and a second magnet in a ring shape around and spaced apart from the first magnet for forming a magnetic gap. One end of the air-permeable mesh is fixed to the second magnet, and another end of the air-permeable mesh is fixed to the frame. A rear cavity is formed jointly by the frame, the yoke, the second magnet and the air-permeable mesh. Compared with the related art, the sounding device disclosed by the present disclosure has a better low-frequency acoustic performance.