Embodiments of this application provide a speaker module and a portable electronic device. The speaker module includes a first speaker module and a second speaker module. The first speaker module includes a first housing and a first speaker monomer accommodated in the first housing, and the first speaker monomer has a first diaphragm. The second speaker module includes a second housing and a second speaker monomer accommodated in the second housing, and the second speaker monomer has a second diaphragm. The first speaker module and the second speaker module are sequentially disposed in a vertical direction, and a vibration direction of the first diaphragm is opposite to a vibration direction of the second diaphragm, so that momentum variations (mv) Δ of the speaker module are offset against each other, thereby resolving a problem that a vibration feeling is strong when the speaker module works.

A MEMS microphone includes a substrate having a cavity, a diaphragm disposed above the substrate to correspond to the cavity, and a back plate disposed above the diaphragm. The diaphragm includes a concave-convex structure, and the back plate includes a second concave-convex structure corresponding to the concave-convex structure.

A MEMS microphone includes a substrate having a cavity, a diaphragm disposed above the substrate to correspond to the cavity, and a back plate disposed above the diaphragm. The diaphragm includes a concave-convex structure, and the back plate includes a second concave-convex structure corresponding to the concave-convex structure.

Acoustic waveguides can be used to improve audio performance of playback devices, such as a soundbar. Such a playback device can include an elongated body defining an outer perimeter with a forward surface, an upper surface, and a rounded edge between the forward surface and the upper surface. An up-firing transducer is configured to direct sound along an axis that has a vertical oblique angle with respect to a forward axis. A waveguide in fluid communication with the up-firing transducer includes a sidewall extending circumferentially around the transducer, the sidewall having a first end adjacent the up-firing transducer and a second end adjacent the outer perimeter, such that an opening defined by the sidewall has a larger area at the second end than at the first end. A rear portion of the sidewall is more steeply angled with respect to the axis than a forward portion of the sidewall.

Acoustic waveguides can be used to improve audio performance of playback devices, such as a soundbar. Such a playback device can include an elongated body defining an outer perimeter with a forward surface, an upper surface, and a rounded edge between the forward surface and the upper surface. An up-firing transducer is configured to direct sound along an axis that has a vertical oblique angle with respect to a forward axis. A waveguide in fluid communication with the up-firing transducer includes a sidewall extending circumferentially around the transducer, the sidewall having a first end adjacent the up-firing transducer and a second end adjacent the outer perimeter, such that an opening defined by the sidewall has a larger area at the second end than at the first end. A rear portion of the sidewall is more steeply angled with respect to the axis than a forward portion of the sidewall.

A loudspeaker (1) comprising a diaphragm (2), a voice coil (10) mounted on the diaphragm (2) to move with the diaphragm (2), a chassis (4), and a spider (20) is disclosed. The spider (20) extends across a gap between the chassis (4) and the voice coil (10) and comprises a plurality of legs (36), each leg (36) extending radially across at least a portion of the gap. The diaphragm (2) is configured to move from a neutral position to an extended position. When the diaphragm (2) is in the neutral position the cross-sectional shape of each leg (36) follows a line which varies in height with respect to a reference plane, said line comprising first, second and third curves, the second curve being located in between the first and third curves. Either the first and third curves are convex and the second curve is concave, or the first and third curves are concave and the second curve is convex. Thus, the spider (20) may have legs (36) having an ‘m’ or ‘w’ shaped profile in at least one region of the leg (36).

A loudspeaker (1) comprising a diaphragm (2), a voice coil (10) mounted on the diaphragm (2) to move with the diaphragm (2), a chassis (4), and a spider (20) is disclosed. The spider (20) extends across a gap between the chassis (4) and the voice coil (10) and comprises a plurality of legs (36), each leg (36) extending radially across at least a portion of the gap. The diaphragm (2) is configured to move from a neutral position to an extended position. When the diaphragm (2) is in the neutral position the cross-sectional shape of each leg (36) follows a line which varies in height with respect to a reference plane, said line comprising first, second and third curves, the second curve being located in between the first and third curves. Either the first and third curves are convex and the second curve is concave, or the first and third curves are concave and the second curve is convex. Thus, the spider (20) may have legs (36) having an ‘m’ or ‘w’ shaped profile in at least one region of the leg (36).

A diaphragm for use in an audio transducer (e.g., a coaxial loudspeaker) includes a higher frequency transducer and a lower frequency transducer. The diaphragm is a component of the lower frequency transducer and is arranged coaxially with the higher frequency transducer. The diaphragm includes a first surface and an opposing second surface. The first surface has a profile shaped to define a horn for output from the higher frequency transducer and the geometry of the first surface is independent of the geometry of the second surface.

A diaphragm for use in an audio transducer (e.g., a coaxial loudspeaker) includes a higher frequency transducer and a lower frequency transducer. The diaphragm is a component of the lower frequency transducer and is arranged coaxially with the higher frequency transducer. The diaphragm includes a first surface and an opposing second surface. The first surface has a profile shaped to define a horn for output from the higher frequency transducer and the geometry of the first surface is independent of the geometry of the second surface.

An omnidirectional loudspeaker having an inverted dome diaphragm disposed operably connected to a motor assembly and a phasing plug mounted to the motor assembly. The phasing plug has a top portion facing a convex surface of the inverted dome diaphragm and a bottom portion extending downward from the top portion along the central axis with a plurality of concentric apertures extending therethrough. Each aperture has a predetermined radial width and is spaced a predetermined concentric distance from an adjacent aperture. The plurality of concentric apertures cooperates with a compression chamber between the convex surface of the inverted dome diaphragm and the top portion of the phasing plug. Each aperture has a predetermined radial width, is spaced a predetermined concentric distance from an adjacent aperture and extends through the phasing plug exiting at the bottom portion.