The present disclosure relates to a method for simultaneously operating a loudspeaker assembly in a loudspeaker function and in a microphone function. The loudspeaker assembly comprises a coil, which is movably mounted in the magnetic field of a magnet, and a diaphragm, which is mechanically coupled to the coil, wherein the magnet produces a magnetic flux density (B), the coil, has an effective length in the magnetic field, and the diaphragm has an area (A). In order to determine a first transfer function Z.sub.M, a first calibration state is set, in which an external sound pressure (p) on the diaphragm is equal to zero. In order to determine a second transfer function Z.sub.C, a second calibration state is set, in which movement of the diaphragm is suppressed. Subsequently, in normal operation the current (I) flowing through the coil and the voltage (U) dropping across the coil are measured and the external sound pressure (p) on the diaphragm is determined using the magnetic flux density (B), the effective length of the coil in the magnetic field of the magnet, the first transfer function, the second transfer function, the area (A) of the diaphragm, the current (I) measured by the measuring device in normal operation, and the voltage (U) measured by the measuring device in normal operation. The present disclosure further relates to a corresponding loudspeaker assembly.

The present invention discloses a speaker having a vibrating system and a flexible circuit board. The vibrating system has a lower vibrating diaphragm with a first fastening portion, a second fastening portion, and a vibrating portion having a first and a second connecting portion and a middle portion. A vertical distance between a tangent line along a vertical vibrating direction at a first end of the first connecting portion and another tangent line along the direction of the middle portion is a first distance; another vertical distance between a tangent line along the direction at the second end of the second connecting portion and another tangent line along the direction of the middle portion is a second distance. Both the first and second distance are longer than a distance of the maximum elastic deformation of the flexible circuit board. The quality of speaker can be improved.

The invention discloses a sound generator having a voice coil. The most outer layer of the voice coil is defined as a tailend layer (last layer), which is wound obliquely from a top of the penult layer adjacent to the diaphragm in a direction away from the diaphragm, so that the high frequency pit of the sound generator is improved. The most outer layer of the voice coil is not completely wound such that the most outer layer reduces the contacting area between the dome and the voice coil, which reduces the split vibration of the dome at high frequency and improves the high frequency-resonance performance.

The invention discloses a speaker. The speaker includes a housing, a magnetic circuit system and a vibration system. The vibration system has a diaphragm and a voice coil. The housing includes a front cover and a frame. The diaphragm has a dome, a suspension and a fixing portion. The frame includes a first connecting wall and a second connecting wall extending from the first connecting wall. The front cover includes a third connecting wall and a fourth connecting wall. The fixing part includes a first fixing portion sandwiched between the first connecting wall and the third connecting wall and a second fixing part sandwiched between the second connecting wall and the fourth connecting wall. By virtue of the configuration, the speaker is provided with better waterproof performance and higher sensitivity.

A rectangular microspeaker according to the present invention transfers vibration sound through the front surface or side surface of a diaphragm. In order to maximize an effective vibration area and to expand a volume, all parts including a frame are fabricated in a rectangular shape. The present invention is applied to a P type, an F type, and a composite type. The vibration sound generated on the bottom of the diaphragm as well as the vibration sound generated on the top of the diaphragm may be discharged through the side surface. A magnetic field part may be insert-molded separately or along with the frame.

Techniques are provided for generating sound using a speaker mounted to an enclosure (e.g., speaker cabinet) wherein a gas pressure level (e.g., air pressure level) inside the enclosure is lower than an ambient air pressure level outside the enclosure. The reduced gas pressure level within the enclosure provides an environment with a reduced pressure level at a back side of a speaker cone of the speaker, which enhances a low frequency response for a given speaker size, while also minimizing resonant frequencies and phase cancellation issues which could otherwise occur with conventional speaker systems in which acoustic sound waves are generated at the back side of the speaker cone. A pressure compensation system is utilized counteract a force applied to the front side of the speaker cone as a result of the gas pressure level inside the enclosure being lower than the ambient air pressure level outside the enclosure.

A vibration system which does not rely on adhesive assembly includes a first bracket and a vibration assembly. The vibration assembly includes a voice coil portion and a first diaphragm portion. The voice coil portion includes a mounting base and a voice coil body. The voice coil body surrounds an outer surface of the mounting base. Through holes define in one end of the mounting base. The through holes penetrate the base. The first diaphragm portion includes two connecting portions and a diaphragm body between the two connecting portions. A first connecting portion connects the first bracket. A second connecting portion surrounds an end of the mounting base away from the voice coil body, and the second connecting portion inserts into the through hole. The disclosure further provides a loudspeaker and a method for manufacturing the vibration system.

An embodiment of the present invention provides a sound generator having a frame; a magnetic circuit system fixed to the frame, and a vibration system. The magnetic circuit system includes a main magnet and an auxiliary magnet surrounding the main magnetic. The vibration system includes a vibrating diaphragm having a first vibrating diaphragm, a second vibrating diaphragm, and a dome for connecting the first vibrating diaphragm to the second vibrating diaphragm. A gap is formed between the auxiliary magnet and the frame. The dome has a body part, two first extension parts, and two second extension parts. The first extension part is located within the gap. Accordingly, the sound generator can solve the swing problem, and improve the low frequency performance.

The present disclosure provides a micro sound device. The micro sound device includes a basket having an accommodating space, a vibration system secured to the basket, and a magnetic circuit system accommodated in the basket and configured to drive the vibration system to vibrate and produce sound. The vibration system includes an upper diaphragm secured to the basket, a voice coil located below the upper diaphragm and configured to drive the upper diaphragm to vibrate and produce sound, and a support apparatus elastically supporting the voice coil. The support apparatus is disposed opposite to the upper diaphragm and separately from the upper diaphragm. The magnetic circuit system includes an upper clamping plate secured to the basket. One end of the support apparatus is fixed to one side of the upper clamping plate and the other end of the support apparatus is fixed to the voice coil.

A micro-speaker includes a vibration unit including a diaphragm assembly and a voice coil assembly, a magnetic circuit unit including a yoke including a voice coil bobbin and a voice coil affixed to the voice coil bobbin, and a magnet provided on the yoke, and a holder including a holder bottom wall abutting against the yoke, a holder sidewall extending from a side of the holder bottom wall close to the magnet along a direction facing away from the yoke and forming a magnetic gap with the magnet in which the voice coil is disposed, and a magnetism shielding wall formed by extending from a side of the holder sidewall facing away from the yoke while being bent towards the voice coil, a side of the magnetism shielding wall facing away from the diaphragm being provided with a hollow annular magnetic conductive sheet spaced apart from the voice coil.