A non-dispensing manufacturing process includes forming a paper cone; engaging the paper cone with a voice coil to form a vibration assembly; fixing a yoke, a magnet set, and a washer to form a magnetic circuit assembly; engaging a basket with the magnetic circuit assembly; and engaging the basket with the vibration assembly to form a speaker, where no glue is used in the manufacturing process. A speaker includes a paper cone; a voice coil engaged with the paper cone to form a vibration assembly, where a junction between a bobbin of the voice coil and the paper cone has a first welding layer; a magnetic circuit assembly including a yoke, a magnet set, and a washer that are integrally fixed; and a basket engaged with the magnetic circuit assembly and the vibration assembly.

An audio device includes a thin film material having a capacitive property, the thin film material including an acoustic sheet having a curved shape, in which the acoustic sheet includes a first region that is actively driven by an input signal and a second region that is not actively driven by the input signal and the first region is formed in at least a part of an outside of the second region.

A speaker includes a frame, a vibration unit fixed to the frame, and a magnetic circuit unit fixed to the frame. The vibration unit includes a diaphragm fixed to the frame, and a coil configured to drive the diaphragm to vibrate and sound. The diaphragm includes a dome. The dome includes a first layer, a second layer and a third layer which are stacked sequentially in a direction from the coil to the diaphragm. The second layer includes a honeycomb structure. The third layer includes a body and a plurality of through holes extending through the body in a vibration direction of the diaphragm. The through holes communicate with the honey structure of the second layer form a resonance cavity.

The speaker device (100) includes a diaphragm (11), an exciter (13) which vibrates in response to an input electrical signal, and a vibration-transmitter (15) which is connected to both the diaphragm (11) and the exciter (13) and transmits the vibration of the exciter (13) to the diaphragm (11), in which the diaphragm (11) has a loss coefficient at 25 C. of 110.sup.2 or higher and the vibration-transmitter (15) has a specific elastic modulus of 20 mm.sup.2/s.sup.2 or higher.

The present invention discloses a diaphragm and a miniature speaker comprising the diaphragm. The diaphragm has a multi-layer composite structure comprising alternately stacked thermoplastic elastomer layers and adhesive film layer(s). The diaphragm and the miniature speaker comprising the same solve the technical problems such as an unstable F0 and high total harmonic distortion of the miniature speaker in the prior art. The diaphragm and the miniature speaker according to the invention have low total harmonic distortion, low damping coefficient, higher F0 stability and high sound quality, satisfying requirements for high sound quality of an electronic device.

A loudspeaker diaphragm (12) comprising a woven fibre body supports damping material (25), for example PVA polymer, on a rearward-facing surface (24). The woven fibre body may be formed of lengths (14) non-metallic fibre material (for example glass fibre) coating with a thin metal coating (32). The mass of the layer of damping material (25) may be less than the mass of the woven fibre body. An attractive sparkly looking loudspeaker diaphragm (12) may thus be provided which damps undesirable vibration whilst providing a flatter frequency-response curve (50).

The present technology relates to an electroacoustic transducer and an electroacoustic transducer apparatus that are compact, have good characteristics, and can retain their stable shape. The electroacoustic transducer includes: a first sheet including a sheet-like piezoelectric material and having a curved shape; and a second sheet having substantially the same shape as the first sheet and placed on the first sheet in a layered manner. The present technology can be applied to an electroacoustic transducer.

A loudspeaker and a vibrating cone for a loudspeaker wherein the vibrating, cone has a vibrating diaphragm arranged to be connected with a voice coil of the loudspeaker at a connecting position, the vibrating diaphragm comprises a first portion adjacent t the connecting position and a second portion spaced a distance from the connecting position. A strength of the first portion of the vibrating diaphragm is greater than a strength of the second portion of the vibrating diaphragm.

An electroactive loudspeaker includes a conductive carrier plate comprising a first main surface and a second main surface, the first main surface and the second main surface being disposed on opposite sides of the carrier plate. The electroactive loudspeaker further includes an electroactive polymer layer comprising a first main surface and a second main surface. An electrically conductive electrode layer is attached to the second main surface of the electroactive polymer layer. The first surface of the carrier plate has an area and the first surface of the electroactive polymer layer has an area, the area of the first surface of the carrier plate being larger than the area of the first surface of the electroactive polymer layer. The first main surface of the electroactive polymer layer overlaps in its entire area with the first main surface of the carrier plate.

A speaker diaphragm structure is installed inside a sound generator device which comprises a frame, a speaker diaphragm structure installed within the frame and a suspension edge whose inner perimeter is connected to the speaker diaphragm structure and whose outer perimeter is connected to the frame; herein the speaker diaphragm structure includes a diaphragm body and a composite material layer, in which the composite material layer is used for bonding onto the surface of the diaphragm body or attaching within the diaphragm body; moreover, the composite material layer is composed of one or more types of tetrapyrrole compounds as well as one or more types of metal ions; additionally, the composite material layer has a thickness smaller than the thickness of the diaphragm body, and is mainly applied to provide the performance effect of sound quality modifications.