A speaker apparatus according to the present invention is a speaker apparatus including an edge that is provided around a diaphragm and that causes the diaphragm to vibrate in a sound emission direction, a frame that is provided around the edge and that supports the diaphragm via the edge, and a linear reinforcement part that is provided on the edge. The reinforcement part extends in a circumferential direction of the edge, and two end portions of the reinforcement part are connected to the frame.

A double gap double coil driven speaker includes a diaphragm, a permanent magnet having a magnetization, and a magnetic flux conducting device having a magnetic flux conducting path. The magnetic flux conducting device and the permanent magnet together form a magnetic flux loop, wherein the magnetic flux loop has two gaps, and directions of magnetic fields generated in the two gaps are opposite to each other. The speaker further includes a voice coil having two coils wound on an outer surface of the voice coil and the voice coil having one end connected to the diaphragm, wherein the two coils are respectively accommodated in the two gaps. When the two coils conduct currents, the voice coil is displaced to push the diaphragm, wherein, relative to a common cross section of the two gaps, the currents respectively flowing through the two coils are in opposite directions.

A double gap double coil driven speaker includes a diaphragm, a permanent magnet having a magnetization, and a magnetic flux conducting device having a magnetic flux conducting path. The magnetic flux conducting device and the permanent magnet together form a magnetic flux loop, wherein the magnetic flux loop has two gaps, and directions of magnetic fields generated in the two gaps are opposite to each other. The speaker further includes a voice coil having two coils wound on an outer surface of the voice coil and the voice coil having one end connected to the diaphragm, wherein the two coils are respectively accommodated in the two gaps. When the two coils conduct currents, the voice coil is displaced to push the diaphragm, wherein, relative to a common cross section of the two gaps, the currents respectively flowing through the two coils are in opposite directions.

The present invention discloses a side diaphragm with a waterproof function that can resist a water pressure over 1 atm. According to the present invention, there is provided a side diaphragm with a waterproof function that is provided in a microspeaker, the side diaphragm including a planar center portion, a planar outer peripheral portion, and a ring-shaped dome portion projecting upward between the center portion and the outer peripheral portion, wherein there is no perforated part and the dome portion does not have additional pleats.

Headphones include a left loudspeaker element; a right loudspeaker element; and a holder for holding the left loudspeaker element and the right loudspeaker element, such that the loudspeaker elements can be attached to the ears, wherein the left loudspeaker element or the right loudspeaker element includes: a first sound converter; a second sound converter, wherein the first sound converter is implemented such that the first sound converter provides directed emission in the direction of an ear in the operating position of the headphones, and the second sound converter is implemented such that the second sound converter provides no or less directed emission than the first sound converter in the direction of the ear in the operating position of the headphones.

A speaker device includes: a diaphragm that radiates sound; an edge arranged in an outer periphery of the diaphragm; a frame arranged in an outer periphery of the edge, and including an annular attachment part connected to an outer peripheral region of the edge; and a connecting member arranged between the outer peripheral region and the attachment part and adhered to the outer peripheral region and the attachment part. An inner diameter of the attachment part is less than an inner diameter of the outer peripheral region.

A speaker device includes: a diaphragm that radiates sound; an edge arranged in an outer periphery of the diaphragm; a frame arranged in an outer periphery of the edge, and including an annular attachment part connected to an outer peripheral region of the edge; and a connecting member arranged between the outer peripheral region and the attachment part and adhered to the outer peripheral region and the attachment part. An inner diameter of the attachment part is less than an inner diameter of the outer peripheral region.

The present invention relates to a fixed-fixed membrane for a microelectromechanical system (MEMS) microphone. In one embodiment, a MEMS acoustic sensor includes a substrate; a membrane situated parallel to the substrate; and at least one vent formed into the membrane, wherein the at least one vent is a curved opening in the membrane, and wherein the at least one vent is disposed substantially along a length of the membrane.

A speaker device includes: a diaphragm that radiates sound; an edge arranged in an outer periphery of the diaphragm; a frame arranged in an outer periphery of the edge, and including an annular attachment part connected to an outer peripheral region of the edge; and a connecting member arranged between the outer peripheral region and the attachment part and adhered to the outer peripheral region and the attachment part. An inner diameter of the attachment part is less than an inner diameter of the outer peripheral region.

A speaker device includes: a diaphragm that radiates sound; an edge arranged in an outer periphery of the diaphragm; a frame arranged in an outer periphery of the edge, and including an annular attachment part connected to an outer peripheral region of the edge; and a connecting member arranged between the outer peripheral region and the attachment part and adhered to the outer peripheral region and the attachment part. An inner diameter of the attachment part is less than an inner diameter of the outer peripheral region.