Disclosed are a voice recognition system and a display device using the same. The disclosed voice recognition system includes a plate structure, a vibration sensor, and a voice recognition device. The plate structure vibrates based on propagation of a voice wave generated from a user, and the vibration sensor is provided in contact with the plate structure to detect the vibration of the plate structure. The voice recognition device recognizes voice of the user by receiving a signal output from the vibration sensor.

A virtual surround sound production circuit includes: a subtraction unit configured to perform subtraction operation on first and second signals to output a third signal; a first addition unit configured to perform addition operation on the first and second signals to output a center channel signal; a surround sound adjustment unit configured to adjust the third signal or another third signal that has undergone frequency compensation to output a fourth signal; a center compensation unit configured to adjust the center channel signal to output a fifth signal; a second addition unit configured to perform addition operation on the first, fourth and fifth signals to output a first output signal; a phase inverter unit configured to perform phase inversion on the fourth signal to generate a phase-inverted signal; and a third addition unit configured to perform addition operation on the second, fifth and phase-inverted signals to output a second output signal.

An electromagnetic actuator includes an inner magnet arranged relative to an axis, an outer magnet arranged a radial distance from the axis, an inner radial wall of the outer magnet facing an outer radial wall of the inner magnet, the inner and outer radial walls being separated by an air gap, a voice coil arranged in the air gap separating the inner and outer magnets, and an actuator coupling plate attached to the voice coil. During operation of the device electrical activation of the voice coil causes axial motion of the actuator coupling plate.

A vibration apparatus, an apparatus including the same, and a vehicular apparatus including the new vibration apparatus are provided having a simplified structure. The vibration apparatus includes a vibration portion, a first electrode portion at a first surface of the vibration portion and configured with a conductive adhesive member, and a second electrode portion at a second surface different from the first surface of the vibration portion.

Speakers for vehicles which can output sound with identical characteristic regardless of shape and dimension of entire components of interiors and exteriors of the speakers and which can be manufactured by small number of components and processes are provided. A speaker for vehicles of the present disclosure includes a vibration component having a plate shape. A vibration surface is formed on a part of the vibration component. A non-vibration surface is formed on a part of the vibration component. A dividing portion divides the vibration surface and the non-vibration surface. A voice coil is fixed on the vibration surface. A holding component is fixed on the non-vibration surface. A magnetic circuit is fixed on the holding component and corresponds to the voice coil.

According to one example, an audio door system includes a door, an audio system, an amplifier, and an exciter. The audio system is coupled to the door. The amplifier is coupled to the door, and is electrically coupled to the audio system. The exciter is coupled to the door, and is electrically coupled to the amplifier. The exciter can transform an audio electrical signal into mechanical energy, and can further cause a surface of the door to transform the mechanical energy into one or more acoustic sound waves.

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.

A panel audio loudspeaker includes a panel and an actuator attached to a surface of the panel and configured to cause vibration of the panel. The actuator comprises a magnetic coil in thermal communication with the panel. The panel audio loudspeaker further comprises a plurality of electrical sensors electrically coupled to the magnetic coil and configured to output time-varying electrical data for the magnetic coil, and an electronic control module in communication with the magnetic coil and the electrical sensors. The electronic control module is configured to perform operations comprising: providing a current to the magnetic coil; receiving the time-varying electrical data for the magnetic coil; determining an electrical energy provided to the magnetic coil between a first time and a second time; accessing a thermal model of the panel; and determining a change in a panel temperature between the first time and the second time.

A speaker device includes: a main body part mounted at a predetermined position; a first actuator that is housed in the main body part and generates vibration corresponding to an audio signal that is input; a vibrating body; and vibration transmitting member. The vibrating body vibrates with vibration transmitted from the outside to generate sound. The vibration transmitting member is a string-shaped or rod-shaped member that transmits the vibration generated by the first actuator to the vibrating body. The vibrating body is placed for hanging from the first actuator by the vibration transmitting member.

A display apparatus according to an embodiment of the present disclosure includes a thin plate-shaped display cell that displays image and a plurality of exciters disposed on a back surface of the display cell and causing the display cell to vibrate. The plurality of exciters is such configured that the plurality of exciters is regarded as one exciter when the plurality of exciters generates vibration in the display cell.