Patent ID: 8776944

Claim:
An on-vehicle acoustic device in which a speaker is mounted on a ceiling part of a vehicle, comprising: the speaker including: a frame supporting an outer periphery edge of a vibrating membrane; a central support part configured to support a magnetic driving unit, the magnetic drive unit adapted to drive the vibrating membrane; and a fixing aperture passing through the central support part; a top plate fixed to or integrally formed with a structural portion of the vehicle; a fixed reinforcing brace proximate to an inner side of the top plate; a ceiling lining configured to cover the top plate and the reinforcing brace; an opening formed in the ceiling lining and disposed proximate the reinforcing brace, the opening having a diameter smaller than a diameter of the frame; wherein a peripheral edge of the opening in the ceiling lining is pressed toward the top plate from an inside of a cabin of the vehicle along a circumferential periphery of the frame so that the central support part is positioned inside the opening of the ceiling lining, and the central support part is fixed to the reinforcing brace; and wherein upward urging of the circumferential periphery of the frame pressing against the ceiling liner causes tension about the opening formed in the ceiling liner so as to create an air baffle between the top plate and the ceiling liner.