An apparatus includes a surface arranged to be mechanically displaced, first permanent magnet coupled with the surface, at least one supporting member for supporting the surface, base, second permanent magnet, coil coupled with the second magnet, and signal port electrically coupled with the coil. An electrical signal is configured to travel between the signal port and the coil. The electrical signal in the coil is proportional to mechanic displacement of the surface when a force equilibrium state of the surface is broken by the electrical signal in the coil or the mechanic displacement of the surface from a position of the force equilibrium state. The coil is arranged at least partially between the first magnet and the second magnet or around one of the first magnet, the second magnet. Either the same or different polarities of the first and second magnets are arranged to directly face each other at a distance.

Provided is a tweeter unit having an improved sound diaphragm and an integral support frame incorporating a sound diaphragm and a magnet as well as integrating an upper washer and a ring packing. The tweeter unit includes: a base frame; an improved integral support frame, including an upper clamp groove and a lower clamp groove, assembled at the base frame; at least one magnet, assembled in the lower clamp groove; an improved sound diaphragm, assembled in the upper clamp groove; and a sleeve frame, including a plurality of openings and a sleeve portion, and sleeved outside the base frame, the support frame, the at least one magnet and the improved sound diaphragm. The improved sound diaphragm includes a thin film layer and a circuit thin film layer, and the circuit thin film layer is fixed on one side of the thin film layer through an electrolytic bonding layer.

A vibration actuator having a stationary element; a movable element that is supported elastically so as to enable vibration on the stationary element; and a driving source for causing reciprocating vibration of the movable element in relation to the stationary element, wherein: the movable element comprises an opposed face that opposes an opposing face of the stationary element; a magnetic fluid that has viscosity is filled into a gap between the opposing face and the opposed face and is attracted magnetically to at least either the opposing face or the opposed face; and on the other of the opposing face or the opposed face, a holding region for retaining the magnetic fluid is provided, and a lipophobic surface, for repelling the magnetic fluid is provided so as to surround the holding region.

It is an object to provide a speaker including a strong magnetic circuit and a method of manufacturing a speaker. To achieve the object, a speaker according to the present technology includes an outer magnet and an inner magnet. The outer magnet has a ring shape and is magnetized along an axial direction of the ring shape. The inner magnet has a circular outer shape when viewed from the axial direction of the outer magnet, is magnetized in a direction opposite to a direction of the outer magnet along the axial direction, and is disposed inside the outer magnet through a gap.

The present disclosure provides an acoustic device, including a frame, a vibration system fixed to the frame, a magnetic circuit system configured to drive the vibration system to vibrate and produce a sound, and a magnetic frame sealing cap configured to fix the magnetic circuit system to the frame, where the magnetic circuit system includes a magnetic yoke and a magnet fixed to the magnetic yoke, the magnetic frame sealing cap includes a bottom wall and a side wall that is in a ring shape and is bent and extends from a periphery of the bottom wall, the magnetic yoke is fixed to the bottom wall, and the side wall is fixed to the frame. Compared with the related art, the acoustic performance of the acoustic device of the present disclosure is optimal.

The present disclosure provides an acoustic device, including a frame and a vibration system and a magnetic circuit system respectively fixed to the frame. The vibration system includes an FPC configured to support and fix the voice coil, where the FPC includes a first fixing arm and a second fixing arm arranged at an interval and an elastic arm configured to connect the first fixing arm and the second fixing arm; and the magnetic circuit system includes a magnetic yoke fixed to the frame, a magnet fixed to the magnetic yoke, and a magnetic frame flange that is bent and extends from a periphery of the magnetic yoke, and the magnetic frame flange is inserted in a gap between the voice coil and the elastic arm. Compared with the related art, the acoustic performance of the acoustic device of the present disclosure is optimal.

The present disclosure provides a speaker, including a frame, a magnetic circuit system and a vibration system accommodated in the frame; the frame includes a main body defining an accommodating space and a mounting portion extending from the main body toward the vibrating diaphragm; the vibrating diaphragm is fixed at the mounting portion; the main body and the mounting portion are integrally formed through double-shot molding by using two kinds of plastics, where the main body is made of PPA, and the mounting portion is made of LCP. According to the speaker provided in the present disclosure, a glued surface between the vibrating diaphragm and the mounting portion has good flatness, which helps to improve waterproof performance and performance yield of the speaker, and firmness of gluing the magnetic circuit system with the main body is high, which helps to improve reliability of the product when the product falls.

An apparatus includes a surface arranged to be mechanically displaced, a first permanent magnet coupled with the surface, at least one supporting member for supporting the surface, a base, a second permanent magnet, a coil coupled with the second magnet, and a signal port electrically coupled with the coil. An electrical signal is configured to travel between the signal port and the coil. The electrical signal in the coil is proportional to mechanic displacement of the surface when a force equilibrium state of the surface is broken by the electrical signal in the coil or the mechanic displacement of the surface from a position of the force equilibrium state The coil is arranged at least partially between the first magnet and the second magnet or around one of the first magnet, the second magnet. Either the same or different polarities of the first and second magnets are arranged to directly face each other at a distance.

A sound-producing device includes, in a case, a yoke formed of a magnetic material, a magnet supported by the yoke, a coil, an armature extending through the coil and facing the magnet, and a vibrator configured to vibrate in response to operation of the armature. The yoke is formed of an FeNi alloy containing 32% by mass to 40% by mass of Ni.

A transcutaneous bone-anchored hearing aid device for a recipient patient is described. The transcutaneous bone-anchored hearing aid device for a recipient patient comprising; a receiver coil for transcutaneous receiving of an externally generated communication signal; a signal processor configured for converting the externally generated communication signal into an electrical stimulation signal; an electromagnetic vibrator configured for receiving the electrical stimulation signal, and wherein the electromagnetic vibrator including; a coil unit configured to generate a dynamic magnetic flux based on the electrical stimulation signal; a permanent magnet configured to generate a static magnetic flux; a mass unit connected to the permanent magnet; a bobbin unit configured to engage with the coil unit, the permanent magnet, and the mass unit; a spring unit configured for maintaining an air gap below a moving mass, wherein the moving mass includes the coil unit, the permanent magnet, the mass unit and the bobbin unit, and where the moving mass and the spring unit is configured to generate an acoustical vibration; a vibrator plate configured to receive the acoustical vibration, and where the air gap is between the vibrator plate and a part of the moving mass, and wherein the mass unit has at least one insert configured to receive at least one of a group that includes at least a part of the permanent magnet, the coil unit, the vibrator plate and/or the spring unit.