Disclosed herein is a sound output apparatus including a case including a hole, and a speaker unit including a first speaker unit and a second speaker unit, wherein the first speaker unit and the second speaker unit are mounted on the case through the hole, spaced apart from each other by a preset distance, and symmetrically arranged, wherein the first speaker unit and the second speaker unit output sound in opposite directions.

Disclosed herein is a sound output apparatus including a case including a hole, and a speaker unit including a first speaker unit and a second speaker unit, wherein the first speaker unit and the second speaker unit are mounted on the case through the hole, spaced apart from each other by a preset distance, and symmetrically arranged, wherein the first speaker unit and the second speaker unit output sound in opposite directions.

A speaker includes a frame, a vibration unit fixed to the frame, and a magnetic circuit unit fixed to the frame. The vibration unit includes a diaphragm fixed to the frame, and a coil configured to drive the diaphragm to vibrate and sound. The diaphragm includes a dome. The dome includes a first layer, a second layer and a third layer which are stacked sequentially in a direction from the coil to the diaphragm. The second layer includes a honeycomb structure. The third layer includes a body and a plurality of through holes extending through the body in a vibration direction of the diaphragm. The through holes communicate with the honey structure of the second layer form a resonance cavity.

An ear-canal earpiece having an electroacoustic sound transducer, a sound guide unit having a first and a second end for guiding the sound from the electroacoustic sound transducer to an ear of a user and at least one portion. The ear canal earpiece has a canal having a first end open towards the ear canal and a second outwardly open end. A diaphragm is provided in the canal and extends over the entire cross-section of the canal.

An ear-canal earpiece having an electroacoustic sound transducer, a sound guide unit having a first and a second end for guiding the sound from the electroacoustic sound transducer to an ear of a user and at least one portion. The ear canal earpiece has a canal having a first end open towards the ear canal and a second outwardly open end. A diaphragm is provided in the canal and extends over the entire cross-section of the canal.

Disclosed herein are speaker assemblies and acoustic devices comprising a panel having a long side and a short side, at least one transducer configured to excite the panel at a plurality of excitation locations on the panel to generate a wave having a wave front substantially perpendicular to the long side and propagating toward the short side of the panel and, optionally, at least one attenuating component mounted to the panel. Methods for generating an acoustic sound are also disclosed herein.

Disclosed herein are speaker assemblies and acoustic devices comprising a panel having a long side and a short side, at least one transducer configured to excite the panel at a plurality of excitation locations on the panel to generate a wave having a wave front substantially perpendicular to the long side and propagating toward the short side of the panel and, optionally, at least one attenuating component mounted to the panel. Methods for generating an acoustic sound are also disclosed herein.

An acoustic generator includes a vibration body; a first exciter and a second exciter which are disposed on the vibration body; a first damping material disposed on the vibration body and having a first portion which overlaps the first exciter; and a second damping material disposed on the vibration body and having a second portion which overlaps the second exciter. The first damping material is disposed so as to straddle at least a portion of a first segment which is a portion of a contour of the first exciter which portion does not face the second exciter, and the second damping material is disposed so as to straddle at least a portion of a second segment which is a portion of a contour of the second exciter which portion does not face the first exciter.

An acoustic generator includes a vibration body; a first exciter and a second exciter which are disposed on the vibration body; a first damping material disposed on the vibration body and having a first portion which overlaps the first exciter; and a second damping material disposed on the vibration body and having a second portion which overlaps the second exciter. The first damping material is disposed so as to straddle at least a portion of a first segment which is a portion of a contour of the first exciter which portion does not face the second exciter, and the second damping material is disposed so as to straddle at least a portion of a second segment which is a portion of a contour of the second exciter which portion does not face the first exciter.

In non-limiting examples of the present disclosure, an electrical receptacle is provided. A first transmission tab configured to be electrically connected to a neutral terminal of the electrical receptacle is provided. A second transmission tab configured to be electrically connected to a live terminal of the electrical is provided. A speaker device in electrical communication with the first and second transmission tabs and a speaker grille cover secured to the receptacle cover are also provided. Other examples of the present disclosure relate to systems, methods and devices for influencing resonant modes of one or more vibrating surface, including a mode throttling device and an exciter device.