This disclosure provides systems, methods, and apparatus related to acoustic transducers.

A sounding device includes a frame, a vibration system, and a magnetic circuit system having a magnetic gap. The vibration system includes a diaphragm fixed to the frame, a voice coil inserted in the magnetic gap to drive the diaphragm to vibrate, a framework connected to the diaphragm, and an elastic conductor fixed to the frame and connected to one side of the framework away from the diaphragm. One end of the voice coil has a lead wire. The framework and the voice coil define a receiving space. The elastic conductor includes an elastic conductor body fixed to the frame, first to third connectors, first and second bending arms. The first bending arm is spaced apart from the second bending arm. The lead wire is fixed to and electrically connected to the third connector. The sounding device has a good consistency in bending size and high pad position precision.

A sounding device includes a frame, a vibration system, and a magnetic circuit system having a magnetic gap. The vibration system includes a diaphragm fixed to the frame, a voice coil inserted in the magnetic gap to drive the diaphragm to vibrate, a framework connected to the diaphragm, and an elastic conductor fixed to the frame and connected to one side of the framework away from the diaphragm. One end of the voice coil has a lead wire. The framework and the voice coil define a receiving space. The elastic conductor includes an elastic conductor body fixed to the frame, first to third connectors, first and second bending arms. The first bending arm is spaced apart from the second bending arm. The lead wire is fixed to and electrically connected to the third connector. The sounding device has a good consistency in bending size and high pad position precision.

Provided is a speaker, including: a frame, a vibration unit including a diaphragm, and a voice coil; a magnetic circuit unit including a yoke and a magnet, the magnetic circuit unit being provided with a magnetic gap; and a lower diaphragm. The voice coil is inserted in the magnetic gap to drive the diaphragm to vibrate and produce sound; the lower diaphragm includes an inner connecting portion, an outer connecting portion, and an intermediate portion; the lower diaphragm includes a structural layer and a metal layer; the inner connecting portion includes a first recess, and the outer connecting portion includes a second recess; and the voice coil is electrically connected to the metal layer through the first recess, and the metal layer is electrically connected to an external circuit through the second recess. With this structure, internal space of the speaker is saved, reducing material cost and improving reliability.

Provided is a speaker, including: a frame, a vibration unit including a diaphragm, and a voice coil; a magnetic circuit unit including a yoke and a magnet, the magnetic circuit unit being provided with a magnetic gap; and a lower diaphragm. The voice coil is inserted in the magnetic gap to drive the diaphragm to vibrate and produce sound; the lower diaphragm includes an inner connecting portion, an outer connecting portion, and an intermediate portion; the lower diaphragm includes a structural layer and a metal layer; the inner connecting portion includes a first recess, and the outer connecting portion includes a second recess; and the voice coil is electrically connected to the metal layer through the first recess, and the metal layer is electrically connected to an external circuit through the second recess. With this structure, internal space of the speaker is saved, reducing material cost and improving reliability.

The invention provides a MEMS microphone. The MEMS microphone includes a substrate, having a first opening. A dielectric layer is disposed on the substrate, wherein the dielectric layer has a second opening aligned to the first opening. A diaphragm is disposed within the second opening of the dielectric layer, wherein a peripheral region of the diaphragm is embedded into the dielectric layer at sidewall of the second opening. A backplate layer is disposed on the dielectric layer and covering over the second opening. The backplate layer includes a plurality of acoustic holes arranged into a regular array pattern. The regular array pattern comprises a pattern unit, the pattern unit comprises one of the acoustic holes as a center hole, and peripheral holes of the acoustic holes surrounding the center hole with a same pitch to the center hole.

The invention provides a MEMS microphone. The MEMS microphone includes a substrate, having a first opening. A dielectric layer is disposed on the substrate, wherein the dielectric layer has a second opening aligned to the first opening. A diaphragm is disposed within the second opening of the dielectric layer, wherein a peripheral region of the diaphragm is embedded into the dielectric layer at sidewall of the second opening. A backplate layer is disposed on the dielectric layer and covering over the second opening. The backplate layer includes a plurality of acoustic holes arranged into a regular array pattern. The regular array pattern comprises a pattern unit, the pattern unit comprises one of the acoustic holes as a center hole, and peripheral holes of the acoustic holes surrounding the center hole with a same pitch to the center hole.

A unidirectional microphone includes: a case having a shape of a bottomed cylinder and including a sound hole in a bottom thereof; a ring-shaped diaphragm fixed to the bottom in the case; a vibrating membrane stretched on the diaphragm; a backplate which has a shape of a bottomed cylinder and is housed in the case in a nested manner such that an air gap to serve as a sound propagation path is formed between the backplate and an inner surface of the case, the backplate including an aperture serving as a sound propagation path in a side face thereof; a spacer positioned between the diaphragm and the backplate to fix the diaphragm and the backplate, and including a notch serving as a sound propagation path in a portion thereof; and a base plate covering a top opening of the case and including a hole serving as a sound propagation path.

A unidirectional microphone includes: a case having a shape of a bottomed cylinder and including a sound hole in a bottom thereof; a ring-shaped diaphragm fixed to the bottom in the case; a vibrating membrane stretched on the diaphragm; a backplate which has a shape of a bottomed cylinder and is housed in the case in a nested manner such that an air gap to serve as a sound propagation path is formed between the backplate and an inner surface of the case, the backplate including an aperture serving as a sound propagation path in a side face thereof; a spacer positioned between the diaphragm and the backplate to fix the diaphragm and the backplate, and including a notch serving as a sound propagation path in a portion thereof; and a base plate covering a top opening of the case and including a hole serving as a sound propagation path.

The present disclosure provides an acoustic device. The acoustic device may include a shell including a first accommodation cavity, a speaker configured in the first accommodation cavity. The speaker may include one or more magnetic circuit assemblies, a voice coil, a vibration assembly, and a vibration transmission plate. The one or more magnetic circuit assemblies may form a magnetic gap. One end of the voice coil may be arranged in a magnetic gap, and another end of the voice coil may be connected with the vibration assembly. The vibration assembly may be connected with the vibration transmission plate, and the vibration transmission plate may be connected with the shell.