A receiver having a pressure equilibrium structure includes a magnetic circuit including a yoke, a permanent magnet coupled to the yoke, and a top plate attached to the permanent magnet, a voice coil configured to vibrate by mutual electromagnetic force with the magnetic circuit, a diaphragm allowing the voice coil to be attached thereto and vibrated by the voice coil to generate sound, and a protector coupled to an upper surface of the diaphragm and surrounding an outer side of the magnetic circuit with a gap from an outer periphery of the magnetic circuit, wherein the protector has a hole communicating with a gap portion with the magnetic circuit and an air path is formed by the hole of the protector and the gap between the magnetic circuit and the protector.

A housing for a communication device comprises a first housing section with a membrane opening, wherein the first housing section comprises around the circumference of the membrane opening a first membrane support configured to couple to a sound membrane, and a magnet carrying support, which is integrally formed with the first housing section and is configured to support a magnet in the housing and below the membrane opening. Furthermore, the present invention provides a communication device.

A wearable audio device including first and second transducer modules is provided. The first transducer module may include a first transducer. The first transducer module may further include a first enclosure having a top side defining a first slit and a bottom side defining a second slit. The first enclosure may be configured to guide a first sound pressure through the first slit, and a second sound pressure through the second slit. The second transducer module may include a second transducer. The second transducer module may include a second enclosure having a top side defining a third slit and a bottom side defining a fourth slit. The second enclosure may be configured to guide a third sound pressure through the third slit, and a fourth sound pressure through the fourth slit. The third and fourths slit may be arranged diagonally opposite the first and second slits, respectively.

A speaker device includes a frame, a vibration unit and a magnetic circuit unit. The vibration unit includes a diaphragm fixed to the frame and a voice coil. The magnetic circuit unit includes a yoke and a magnet assembly that is accommodated and fixed in the yoke and is spaced apart from the yoke to form a magnetic gap. The voice coil is inserted in the magnetic gap. The yoke includes a yoke bottom wall, a yoke side wall and flanges. The flange includes a first section and a second section extending from the first section. A side of the first section close to the second section and the second section enclose a fixing step. The second section is fixed to the frame. The speaker device of the present disclosure has better reliability.

A sounding device includes a positioning bracket, a vibration system including diaphragm and voice coil, and a magnetic circuit system including yoke fixed to the positioning bracket and magnet. The yoke includes yoke body fixed to the magnet, yoke sidewall bending and extending from periphery of the yoke body to the diaphragm, and yoke extension portion bending and extending from the yoke sidewall to the positioning bracket. The positioning bracket includes positioning bracket body and positioning slot formed by depression from one side of the positioning bracket body close to the yoke to the diaphragm. One side of the yoke extension portion close to the diaphragm abuts against a bottom surface of the positioning slot. One end of the yoke extension portion away from the yoke sidewall is fixed to the positioning bracket. The sounding device has a simple structure, high strength, easy assembly and positioning, and high reliability.

A speaker device includes: a frame, a vibration unit and a magnetic circuit unit. The vibration unit includes a diaphragm and a voice coil. The magnetic circuit unit includes a yoke and a magnet. The yoke includes a yoke body, a yoke side wall and yoke extension portions protruding from the yoke side wall toward the frame. The magnet is fixed to the yoke body and is spaced apart from the yoke side wall to form a magnetic gap. The voice coil is inserted into the magnetic gap. The yoke side wall is fixed to the frame. The frame body includes a frame body having a ring shape, and frame fixing portions extending from the frame body toward the yoke side wall. The speaker device of the present disclosure can achieve a simple structure, high strength, easy assembly and positioning, and high reliability.

A loudspeaker device includes first and second diaphragms arranged co-axially in an opposed relation to each other and having a rear volume in-between, each diaphragm having a plurality of motors operatively coupled thereto, and a frame having first and second ends, and first and second rims provided at the first and second ends, respectively. The motors of the first and second diaphragms are arranged in the same plane, and the motors are provided on the frame around the periphery of the first and second diaphragms.

Example embodiments disclosed herein relate to a transducer assembly and associated signal processing. A transducer assembly includes two voice coils in a telescopic arrangement and having unequal sizes, and two suspension systems connected to the two voice coils, respectively. The two voice coils extend in opposites directions from their suspension systems. Dimensions of respective wires of the two voice coils are determined based on respective magnetic flux densities in magnetic gaps for receiving the two voice coils. As a result, a residual vibration caused by the unequal-sized voice coils can be further reduced.

Disclosed is a sound production device including a housing and a vibration assembly, the vibration assembly including a voice coil being of a hollow columnar structure and a vibration diaphragm bonded to an end face of the voice coil; where the sound production device further includes a system stabilization component bonded to an end face of the voice coil or to a side wall of the voice coil; the system stabilization component is of a line-like structure formed by winding a metal wire, and includes a first connection part connected to the voice coil, a deformation part, and a second connection part connected to the housing.

A loudspeaker device includes first and second diaphragms arranged co-axially in an opposed relation to each other and having a rear volume in-between, each diaphragm having a plurality of motors operatively coupled thereto, and a frame having first and second ends, and first and second rims provided at the first and second ends, respectively. The motors of the first and second diaphragms are arranged in the same plane, and the motors are provided on the frame around the periphery of the first and second diaphragms.