Provided is a signal processing device including a displacement detection unit configured to detect a displacement amount of a video display panel that is vibrated to generate sound on the basis of an input audio signal, a threshold setting unit configured to calculate a displacement amount at which no image shake occurs and set a displacement amount calculated as a threshold, and a gain adjustment unit configured to adjust a level of the input audio signal on the basis of a result of comparison between a displacement amount detected by the displacement detection unit and the threshold.

A speaker (10) includes a radiation surface (15). The radiation surface (15) has a first region (15a), a second region (15b), and a third region (15c) between the first region (15a) and the second region (15b). When an axis passing through the third region (15c) and extending away from the radiation surface (15) is defined as a reference axis (10X), the speaker (10) forms a first wavefront (16a) propagating from the first region so as to approach the reference axis (10X) and a second wavefront (16b) propagating from the second region (15b) so as to approach the reference axis (10X).

The display device is provided which includes a signal processing unit that processes an image signal and a sound signal, a plate-like panel unit that displays an image according to the image signal, and a vibration unit that is deployed on the rear face side of the panel unit and causes the panel unit to vibrate in response to the sound signal. The vibration unit includes a plurality of vibrators, and the signal processing unit outputs the sound signal not only to a sound output vibrator that is a vibrator of an output target of the sound signal from among the plurality of vibrators but also to a dispersion sound output vibrator that is a vibrator of a dispersion target of the sound signal. The present technology can be applied, for example, to a television receiver.

A vibration device includes: a glass diaphragm; an exciter which is fixed to the glass diaphragm and vibrates the glass diaphragm; an enclosing member which defines an internal space by enclosing a portion, including a fixing position of the exciter, of the glass diaphragm, one end portion of the glass diaphragm being exposed to outside the internal space through an opening of the internal space; and a shielding member for acoustic shielding between the opening and the glass diaphragm, the shielding member dividing the glass diaphragm into an excitation region located inside the internal space and a vibration region located outside the internal space.

A sound producing package structure configured to produce sound includes a substrate, a sound producing component and a conductive adhesive layer. The sound producing component is disposed on the substrate, and the sound producing component is configured to generate an acoustic wave corresponding to an input audio signal. The conductive adhesive layer is disposed between the substrate and the sound producing component by a surface mount technology.

A sound generator includes a piezoelectric device, a first weight member disposed at a first portion of the piezoelectric device, a second weight member disposed at a second portion of the piezoelectric device, a first elastic member disposed at a third portion between the first portion and the second portion of the piezoelectric device, and a protection member configured to cover the piezoelectric device, the first weight member, the second weight member, and the first elastic member.

A soundboard panel assembly for a vehicle, including a mounting structure, a soundboard panel connected to the mounting structure, and an inertial-type acoustic transducer connected to the soundboard panel.

The speaker device (100) includes a diaphragm (11), an exciter (13) which vibrates in response to an input electrical signal, and a vibration-transmitter (15) which is connected to both the diaphragm (11) and the exciter (13) and transmits the vibration of the exciter (13) to the diaphragm (11), in which the diaphragm (11) has a loss coefficient at 25° C. of 1×10.sup.−2 or higher and the vibration-transmitter (15) has a specific elastic modulus of 20 mm.sup.2/s.sup.2 or higher.

An electronic device is provided. The electronic device includes a multi-channel speaker system, and an electronic device according to an embodiment of the disclosure includes a housing, a display which is attached to the housing to be seen from the outside, an actuator which is attached to a back surface of the display to vibrate the display and to generate a sound of a first frequency band, a hole which is formed on one side surface of the housing, and a speaker which is positioned on a region adjacent to the hole to generate a sound of a second frequency band different from the first frequency band through the hole. The actuator includes a first actuator which is attached to a certain region of the back surface of the display to vibrate the display, and a second actuator which is attached to a back surface of the display spaced apart from the first actuator by a designated distance to vibrate the display.

A display apparatus includes: a display module including a display panel configured to display an image, a vibration plate on a rear surface of the display module, a connection member between the rear surface of the display module and the vibration plate, at least one vibration module on the vibration plate, and an enclosure between the display module and the vibration plate, the enclosure being spaced apart from the vibration module, the enclosure surrounding the vibration module.