Multiple cone transducer

Details Multiple cone transducer Multiple cone transducer

H - Electricity

04

R

H04R 11/04 (2006.01) H04R 9/06 (2006.01)

Patent

CA 2188899

A loudspeaker comprises a motor stator defining an air gap. The stator provides a magnetic field in the air gap. A former supports a voice coil through which current to be transduced into audio is to be passed in the air gap. A first diaphragm is fixed to the former at a first position a first distance along the length of the former. The first diaphragm has a first outer perimeter. A first compliance for permitting relative movement between the first outer perimeter and frame couples the first outer perimeter to the frame. A first opening in the frame vents air from a first face of the first diaphragm. A second opening in the frame vents air from a second face of the first diaphragm. A second diaphragm is fixed to the former at a second position a second distance greater than the first distance along the length of the former. The second diaphragm has a second outer perimeter. A second compliance permitting relative movement between the second outer perimeter and frame couples the second outer perimeter to the frame. A third opening in the frame vents air from a first face of the second diaphragm. A first partition disposed between the second face of the first diaphragm and the first face of the second diaphragm provides a fourth opening through which the former extends. The fourth opening lies between the first and second positions.

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