The present disclosure relates to a slim acoustic transducer having a thin thickness a low-frequency reproduction capability and a sound pressure level in the entire frequency band of which may not be lowered. A slim acoustic transducer includes a diaphragm; a voice coil disposed at a peripheral portion of the diaphragm; and a permanent magnet disposed around the voice coil and configured to apply a magnetic field to the voice coil, wherein a maximum amplitude of the diaphragm is less than a thickness of the permanent magnet.

A multi-driver transducer having symmetrical magnetic circuits and symmetrical coil circuits, wherein one or more pieces of circular or annular partitions made of a non-magnetic material are used to bond two or more sets of dual magnetic gap and dual coil driver units (01 or 02) into one integrated magnetic core. Four or more coaxial isodiametric annular magnetic gaps are formed between the inner circumferential face or outer circumferential face of one or two tubular magnetic yokes embedded in an open-end tubular thin wall of the bracket and the vertical circumferential face of an upper pole plate and a lower pole plate of the magnetic core, four or more coaxial and isodiametric coils are inserted in the four or more coaxial and isodiametric annular magnetic gaps, and the winding direction, connection manner, and necessary technical features of the coils are governed; thus, the multi-driver transducer having one or more pairs of mutually-repelling magnets, symmetrical magnetic circuits, and symmetrical coil circuits is constituted. Back electromotive force and inductance acquired via induction by the transducer during the working process are mutually offset. The transducer has resistive load features or near-resistive load features, and has super-high sensitivity, high resolution, and high-fidelity quality.

The present invention relates to a loudspeaker 1 including a cone 20 having a central aperture with a cone collar 28 upstanding from the perimeter of the central aperture 26 of the cone, a spider 30 having a central aperture 36, the spider having a collar 38 upstanding from the perimeter of the central aperture of the spider, and a voice coil former 40. The collar of each of the cone and the spider are concentrically located around an end region of the voice coil former to form an elongate neck region 12. The use of the elongate neck region allows for the cone, spider and voice coil former to be joined more easily therefore forming a more reliable and durable join.

A method for forming a suspension element for an acoustic driver. The method includes placing an unimpregnated fabric formed from a monofilament polymer fiber in a mold, the monofilament fiber characterized by a softening point and a melting point; heating the mold and the unimpregnated fabric to a temperature greater than the softening point and less than the melting point; and cooling the mold.

A vibration unit includes an encircling frame defining a vibration cavity therewithin, a vibration member disposed in the vibration cavity, and a suspension including an elastic diaphragm having a periodical wave-shape extended between the vibration member and the encircling frame to support the vibration member within the vibration cavity. The wave-shape diaphragm provides a 3-dimensional connection between the vibration member and the encircling frame to self-generate a repelling force to against a lateral movement of the vibration member so as to ensure the vibration member to be reciprocatingly moved in a linear direction.

A vibration generation apparatus includes a concave frame, a vibrator, and a first damper. The frame has an opening in upper portion thereof. The vibrator is housed in the frame. The first damper is connected to the vibrator and the frame and is configured to hold the vibrator such that the vibrator is able to move in an up-down direction with respect to the frame. The first damper has a predetermined thickness. The first damper is in an N-shape in a side view and includes two bent portions and has an upper end mounted on an edge of the opening and a lower end mounted on a lower edge of the vibrator.

The present invention is intended to provide a sound generating actuator which can facilitate heat dissipation from a voice coil. According to the present invention, there is provided a sound generating actuator, including: a frame; a stationary part mounted on the frame and provided with a yoke, a magnet and a top plate to compose a magnetic circuit; a voice coil configured to receive an electrical signal and vibrate due to a magnetic field and mutual electromagnetic force of the stationary part; a spring configured to dampen vibration of the voice coil and that is made of a metallic material and secured to the frame; and a contact pad that is attached to the spring and configured to transfer vibration of the voice coil.

A speaker device (1) having a frame (2), two opposite directed diaphragms (3, 3′), and two speaker drivers, each having at least one magnetic driver (10, 10′) for driving the two opposite directed diaphragms (3, 3′) in operation. A speaker damper (5, 5′) is associated with each of the two opposite directed diaphragms (3, 3′), and has a coil bracket (4, 4′) arranged to be driven by the associated at least one magnetic driver (10, 10′), a diaphragm connection member (6, 6′) arranged to fixedly attach the diaphragm (3, 3′) to the speaker damper (5, 5′), and a damper frame connection member (8, 8′) arranged to fixate the speaker damper (5, 5′) to the frame (2). The speaker damper (5, 5′) further comprises a damper leg member (7, 7′) arranged between the diaphragm connection member (6, 6′) and the damper frame connection member (8, 8′).

A micro speaker capable of preventing voice coil rubbing, including an outer casing provided with a holding space, a diaphragm installed within the holding space, a magnet provided with an axis, a voice coil encircling the exterior of the magnet and connected to a diaphragm, and an elastic connecting member connected between the voice coil and the magnet. The diaphragm is disposed on the first end, and the magnet is disposed on the second end of the holding space so as to be separated from the diaphragm. The elastic connecting member is used to maintain a clearance between the voice coil and the magnet. After a signal voltage is fed into the voice coil, the diaphragm extends along the axis causing amplitudes of vibration, and the elastic connecting member reduces amplitudes of deflection produced along the axis, thereby preventing rubbing between the voice coil and the magnet from occurring.

The systems and methods described herein relate to, among other things, a transducer capable of producing acoustic and tactile stimulation. The transducer includes a rigid mass element disposed on the diaphragm of a speaker. The mass element may optionally be removable and may have a mass selected such that the resonant frequency of the transducer falls within the range of frequencies present in an input electrical audio signal. The systems and methods advantageously benefits from both the fidelity and audio performance of a full-range speaker while simultaneously producing high-fidelity, adjustable and palpable haptic vibrations.