Patent ID: 8837762

Claim:
A speaker comprising: a magnetic circuit having a magnetic gap; a voice coil disposed in the magnetic gap and driven by electromagnetic interaction when current is applied to the voice coil; a diaphragm that vibrates in conjunction with the voice coil; a damper that elastically supports the voice coil and the diaphragm; a frame that holds the outer periphery of the diaphragm and the outer periphery of the damper; and a duct protruding from the frame, an open end of the duct on the distal end side thereof facing an external space, wherein the frame has a substantially closed surface on a side of the diaphragm that faces the damper, except for an opening provided in the frame being an open end of the duct on the base end side thereof, wherein a space surrounded by the frame on one side of the diaphragm is separated by the damper into a first internal space and a second internal space, the first internal space is facing one part of the opening, the second internal space is facing another part of the opening, and thereby the first and second internal spaces are caused to communicate with the external space.