A speaker device includes a resonant cabinet, a speaker unit and an inverted tube. The resonant cabinet is installed inside a device casing. A speaker chamber is defined between the resonant cabinet and the device casing and communicates with a plurality of first outlets formed on the device casing. The speaker unit is disposed inside the speaker chamber and for emitting a sound. A part of the sound is emitted from the plurality of first outlets by a first frequency via the speaker chamber. The inverted tube connects the resonant cabinet and the device casing. An inverted chamber is formed inside the inverted tube and communicates with the speaker chamber. Another part of the sound emits by a second frequency via the speaker chamber and the inverted chamber, wherein a peak value of the second frequency is smaller than a peak value of the first frequency.

An acoustic insert for lining a loudspeaker reflex port, the insert comprising an elongate hollow tube formed of a flexible material, having an outer wall sized and configured to seat within the port and an inner wall extending in the elongate direction, the inner wall having a circumference which varies along the length of the insert, When inserted in a port, the insert alters the port resonance so as to vary the acoustic perfoi mance of the loudspeaker.

An organic light emitting device includes: a substrate; a first electrode provided on the substrate; a metal pattern provided along an edge of the first electrode; and a pixel definer provided on the metal pattern. The pixel definer covers an end portion of the first electrode and an end portion of the metal pattern. The pixel definer includes an opening exposing the first electrode.

An apparatus comprising: an audio transducer configured to at least one of: generate sound upon receiving an audio signal provided by the apparatus; and convert sound into an audio signal to be processed by the apparatus; a housing component comprising one or more sound apertures configured to allow the transmission of sound through the one or more sound apertures; and an acoustic cavity inside the apparatus being acoustically coupled to the audio transducer using the one or more sound apertures wherein the one or more sound apertures are configured to provide an acoustic damping.

A sound image localization effect is enhanced to ensure a preferable viewing state in which a sense of unity between an image or video and sound is generated.

A display device includes: a display on which an image is displayed on a display surface; a rear cover arranged on a back surface side of the display; and an upper speaker and a lower speaker arranged between the display and the rear cover and located so as to be separated vertically from each other, in which an upper slit functioning as a passage hole for sound output from the upper speaker is located above the display, a lower slit functioning as a passage hole for sound output from the lower speaker is located below the display, and a vertical width of the lower slit is larger than a vertical width of the upper slit.

Provided is an audio reproduction device including: first and second speaker supports that have a lid shape and are provided on a case in an openable and closable manner; a sensor that detects a first state and a second state, the first and second speaker supports being closed in the first state, the first and second speaker supports being opened and held almost horizontally in the second state; first and second speakers respectively attached on front surfaces of the first and second speaker supports such that a distance in the second state is larger than a distance in the first state; and a reproduction characteristic control unit that switches reproduction characteristics of the first and second speakers in the first state and the second state on the basis of a detection signal from the sensor.

A display apparatus includes a display module that includes a display panel and is configured to display an image. A rear cover is on a rear surface of the display module. A first vibration generating module is in a first rear region of the rear cover, and a second vibration generating module in a second rear region of the rear cover. The rear cover includes a first hole that overlaps the first vibration generating module, and a second hole that overlaps the second vibration generating module.

The present invention is directed to a headphone device including zones to separate different frequency ranges for enhancing and improving sound quality. The headphone device includes more than one cavities and second auxiliary holes. The second auxiliary holes are configured for most bass or low-frequency to enter a second cavity through the second auxiliary holes and to have a better frequency division effect and to improve the audio quality of the headphone device.

A speaker device for reproducing sound within a predetermined audio spectrum is provided. The speaker device comprises: a housing including a top, a bottom, and a side surface; at least one speaker disposed within the housing, the at least one speaker including a speaker flange facing towards the bottom; a waveguide including at least a first surface defining at least one sound channel for conducting a given sound produced by the at least one speaker, and the at least one channel includes a first zone, a second zone, and a third zone sequentially defined along a length thereof to provide for sound reproduction from 100 Hz to 20000 Hz.

An acoustic device includes an enclosure and a bass reflex port that includes a tube body. An inner wall surface of the tube body includes multiple regions in which viscous resistances in a tube axis direction of moving air and the inner wall surface are different. The multiple regions are provided along a circumferential direction of the inner wall surface. The tube body is attached to an opening area in the enclosure.