Abstract:
PROBLEM TO BE SOLVED: To reduce weight variation of a vibrating surface by eliminating the need of soldering conducting wire or the like to the vibrating surface. SOLUTION: To feed the power from an external terminal 300 to each coil 56 of the vibrating surface 54 of this vibrating diaphragm 50, ribbon leads 104 and 105 of an extending part 100 of the vibrating diaphragm 50 are curved, pressed and connected to the external terminal 300 of a yoke 14. Thus, a manufacturing processing is simplified. In addition, the weight of the vibrating surface 54 is uniformly distributed, and solder does not adhere along the wire. Since there is little influence on the vibrations of the vibrating surface 54, sound quality is improved. COPYRIGHT: (C)2008,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a train noise reducing device which can reduce train noise. SOLUTION: A sound-proof wall 16 is disposed upright on a roof of a train so as to surround a pantograph 14. Almost the whole of right and left side walls 16A is constituted by using a plurality of plane speaker units 24 for generating a plane wave. A microphone 44 is fixed on the roof 12. The microphone 44 and the plane speaker units 24 are connected with a control unit 48. Based on noise N detected at the microphone 44 (noise generated when the pantograph 14 slides to a wire 46), a control part 48 drives the plane speaker units 24 in such a manner that a cancelling sound UN of an antiphase with the noise N is generated. The cancelling sound UN outputted from the plane speaker units 24 and the noise N (diffraction sound) which has carried out diffraction by the upper end 16A of the sound proof wall 16 overlap with each other, so that the noise level of the train exterior sound proof wall 16 is reduced. COPYRIGHT: (C)2004,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To provide an on-vehicle speaker device capable of enhancing rigidity of interior material and transferring vibration of a composite loudspeaker efficiently to the interior material.SOLUTION: The present device is an on-vehicle speaker device 1 mounted on an interior material (ceiling base material 20) of a vehicle, and comprises: a composite loudspeaker 14 that has a loudspeaker part 12 to output a middle-pitched sound and an actuator part 13 to output a low-pitched sound; and a vibration member 15 on which the actuator part is mounted, and which supports the composite loudspeaker and is mounted on the interior material. As for the composite loudspeaker, the loudspeaker part is arranged in a cabin inner side R1, and the actuator part is arranged in a cabin outside R2 in the state where the vibration member is mounted on the interior material.
Abstract:
PROBLEM TO BE SOLVED: To provide a vehicle seat in which, in a vehicle seat with a speaker installed therein, a sound generated from the speaker is less likely to block an passenger in the front seat from receiving other sound.SOLUTION: The vehicle seat has: a seat cushion 10 for the occupant to sit thereon; a seat back 11 for supporting the back of the passenger sitting on the seat cushion, and made reclinable relative to the seat cushion 10; and a line sound source speaker 20 disposed horizontally in the back rest of the seat back 11. The line sound source speaker 20 is provided in such a manner that a diaphragm 21 thereof faces obliquely downward even with the seat back 11 being in the most upright position.