Disclosed are a closed loudspeaker box, a display device including the closed loudspeaker box, and a method for testing the closed loudspeaker box. The closed loudspeaker box includes: a housing; a chamber surrounded by the housing; a through hole penetrating the housing and communicating with the chamber; and a plug, at least a part of the plug is inserted into the through hole, wherein the plug includes a plug main body and a vent hole penetrating the plug main body, and the vent hole communicates the chamber and a space outside the housing.

According to various embodiments of the disclosure, an electronic device may include: a first housing, a second housing accommodating at least a portion of the first housing and configured to guide sliding movement of the first housing, a flexible display including a first display area disposed on the first housing and a second display area extending from the first display area, a speaker module including a speaker unit including at least one speaker disposed in the second housing and a speaker enclosure accommodating the speaker unit and including a vent hole, and a seal connected to the first housing and the speaker enclosure and configured to be variable based on the sliding movement of the first housing.

The present disclosure provides a dome type diaphragm, a balanced dome diaphragm, and a speaker capable of outputting sounds in a high sound area at a high sound pressure. A dome type diaphragm according to the present disclosure includes: a first part having a first curvature; and a second part that is arranged in an inner peripheral side of the first part and is integrally provided with the first part, the second part having a second curvature that is different from the first curvature.

A speaker module includes a first cavity body, a second cavity body disposed adjacent to the first cavity body and a vibration module disposed in the first cavity body and including a first diaphragm and a second diaphragm which are horizontally spaced apart. The first cavity body includes a first sub-cavity and a second sub-cavity which are respectively located on two opposite sides of the vibration module, and the second sub-cavity is communicated with the second cavity body.

A passive diaphragm assembly includes a counterweight member, a first diaphragm and a second diaphragm. The first diaphragm and the second diaphragm are spaced apart from each other, are connected respectively to opposite ends of the counterweight member, and cooperate with the counterweight member to define an air space thereamong.

A speaker device includes a housing body, a speaker driver and a passive radiator. The housing body is formed with a first sound hole and a second sound hole respectively opening in two opposite directions. The speaker driver is disposed in the housing body, is located adjacent to the first sound hole, and is adapted to generate sound. The passive radiator is disposed in the housing body, is located adjacent to the second sound hole, and is adapted to generate sound. The first sound hole and the second sound hole are adapted for respectively allowing the sound generated by the speaker driver and the sound generated by the passive radiator to travel out from the housing body respectively in two opposite directions therethrough.

A portable instrument amplification system includes a cabinet having a top cabinet member, a bottom cabinet member, and a plurality of side cabinet members. The portable instrument amplification system also includes at least one sealed chamber having a front chamber member, a side chamber member, a rear chamber member, at least one speaker driver, at least one side passive radiator, and at least one cabinet bracing secured in at least one corner of the sealed chamber. The cabinet bracing includes a cabinet bracing body, and at least one stiffener attached to the cabinet bracing body. The portable instrument amplification system also includes at least one front-facing port having a rear port member vertically attached between the side chamber member and a second side cabinet member behind the at least one side passive radiator, and a bass phase plug vertically disposed facing the at least one side passive radiator.

Various implementations include portable loudspeakers. Certain implementations include a portable loudspeaker that mitigates ingress of moisture, particulates, and other contaminates. In particular implementations, the portable loudspeaker includes a housing with an enclosure having a co-molded construction for ingress resistance.

Disclosed are a sound device and a portable terminal. The sound device includes a first vibration system including a bobbin voice coil, the bobbin voice coil being provided behind a first diaphragm and fixedly connected to the first diaphragm, the bobbin voice coil including a bobbin and a voice coil body formed by winding voice coil leads on the bobbin, one end of the bobbin away from the first diaphragm at least partially configured to protrude from the voice coil body; a second vibration system including a second diaphragm opposite to the first diaphragm; and a magnetic circuit system between the first diaphragm and the second diaphragm, the magnetic circuit system being provided with an avoiding portion. One end of the bobbin away from the first diaphragm is movable to penetrate through the avoiding portion and is fixedly connected to the second diaphragm.

A smart vanity mirror speaker system may include a surface-mounted mirror that includes a mirror on one side and a screen display opposite the mirror, and a module capable of capturing, broadcasting, and recording still photos, audio, and video of a user, wherein the mirror is capable of being adjusted in height and angle. The system may include at least one light ring, a companion device/control panel, and/or an external microphone. The system includes an acoustic chamber connected to a bottom portion of the mirror, the acoustic chamber having a speaker integrated within the acoustic chamber. The acoustic chamber may include a downward-facing full-range driver on a lower end of the acoustic chamber; and a passive base isolator on an upper end of the acoustic chamber. The smart vanity mirror speaker system may pair with at least one Bluetooth®-enabled device or MP3 player.