An acoustic speaker (1), comprising: a metal frame (3), a plastic shell (5) fastened on the frame, the shell defining at least two openings (7A, 7B), at these two loudspeakers (9A, 9B) arranged back-to-back along a transverse axis (T), the two loudspeakers respectively extending through the two openings.

The frame comprises an inner part (21) located transversely between the two loudspeakers and on which the two loudspeakers are fastened.

An acoustic speaker (1) including: a metal armature (7), a plastic shell (9) fastened on the armature, the shell defining at least two openings (11A, 11B), and at these two loudspeakers (13A, 13B) arranged head to tail along a transverse axis (T), the two loudspeakers respectively extending through the two openings.

The shell is in one piece, and the shell and an outer part (19) of the armature are suitable for nesting in one another along a longitudinal axis (L), the outer part and the shell at least partially defining an inner volume (23) of the acoustic speaker.

A personal watercraft includes a hull; a deck disposed on the hull, the deck including a pedestal; a straddle seat on the pedestal; a motor disposed between the hull and the deck; a propulsion system operatively connected to the motor; and at least one speaker assembly disposed at a forward portion of one of the left and right foot-wells. The speaker assembly includes a housing defining a bass port, and a water resistant speaker driver. The speaker driver includes a basket a plurality of apertures, the plurality of apertures being disposed in the interior of the housing, a cone supported by the basket, a surface of the cone fluidly communicating with air surrounding the basket via the plurality of apertures, a dust cap connected to the cone, a suspension element connected to the cone and the basket, and a water resistant voice coil assembly operatively connected to the cone.

The invention includes a one-piece foldable flexible foam baffle that can be adapted in length to installation plenums of various sizes, together with an egg crate foam type rear damper and a gasket for attaching the foldable baffle to a loudspeaker basket rim. A front portion and a rear portion of the foldable baffle are independently foldable to adjust the length of the foldable baffle for various door plenums and trim panel offsets. The baffle has small axial grooves on a rear portion that serve as auxiliary cutting lines as a guide for cutting away portions of the baffle to manage the back wave of the speaker in ways an audiophile prefers.

A dual wave-column, dual-driver loudspeaker enclosure is described. The two drivers are cross-coupled through their respective front and back sides by two single exit wave-columns. At the wavelength frequency of the waveguide length, both drivers resonate with the waveguides, and cone motion is minimized while output is maximized. At the wavelength frequency, the front wave of the first driver is in-phase with, the rear wave of the second driver such that the output is increased, reinforced, and smoothed at that frequency. At the wavelength frequency, the two wave-column mouth outputs exhibit acoustic mutual coupling, which boosts acoustic output and reduces cone motion at the critical maximum displacement frequency.

Disclosed is a display apparatus capable of improving a sound quality through an accurate sound transmission, wherein the display apparatus may include a backlight module connected with a rear surface of a display panel, a rear structure for surrounding the backlight module, and a vibration generating device for vibrating the display panel through the backlight module, wherein the vibration generating device is fixed to the rear structure.

A speaker device is disclosed. The speaker device includes a speaker enclosure structure including a speaker. The speaker is an electro-mechanical component, which in operation generates sound waves by deflection of a speaker membrane and in collaboration with the speaker enclosure structure. The speaker device further includes a speaker device housing. The speaker device housing is an outer shell of the speaker device and may accommodate additional electronic components required for operation of the speaker or for other purposes. The speaker enclosure structure is mechanically coupled to the speaker device housing. The speaker device further includes at least one coupling element, wherein the speaker enclosure structure is mechanically coupled to the speaker device housing by the at least one coupling element, the coupling element having a vibration damping structure configured to inhibit mechanical vibrations being transmitted through the coupling element.

In at least one embodiment, a microphone assembly including a substrate, a printed circuit board (PCB), a micro-electro-mechanical systems (MEMS) transducer, a first lid, and a second lid is provided. The substrate defines a first port that extends completely therethrough. The PCB defines a sound opening that extends completely therethrough. The MEMS transducer is positioned on a first side of the substrate. The first lid defines a second port and covers the MEMS transducer and the first port. The first lid and the substrate define a front volume of air that surrounds the MEMS transducer. The second lid is positioned on the second side of the PCB. A cavity of the second lid, the sound opening of the PCB, the sound opening of the PCB, and the first port of the substrate define a back volume of air that is greater than the front volume of air.

The present disclosure may provide an acoustic device. The acoustic device may include a housing, at least one low-frequency acoustic driver, at least one high-frequency acoustic driver, and a noise reduction assembly. The housing may be configured to be rested on a shoulder of a user. The at least one low-frequency acoustic driver may be carried by the housing and configured to output first sound from at least two first sound guiding holes. The at least one high-frequency acoustic driver may be carried by the housing and configured to output second sound from at least two second sound guiding holes. The noise reduction assembly may be configured to receive third sound and reduce noise of the third sound.

The present disclosure provides a speaker adapter, and a dual core speaker assembly. The speaker adapter includes: a main body, symmetrically provided with two mounting portions at both sides for matching with speakers respectively; a bottom base, extending from and around the main body, for supporting the main body; and an inner cavity formed within the main body.