Patent ID: 8971564
Filing Date: 2015-03-03
Classification: H04R,Y10T

Abstract:
1. A voice coil support for a coil transducer motor structure having a first surface towards one end and a second surface towards the other end along an axis of displacement, the voice coil support being adapted to receive at least one coil wound around an outer surface of the voice coil support, the at least one coil being arranged in use for displacing the voice coil support along the axis of displacement, as a current is driven through the at least one coil when the voice coil support is placed in a magnetic field, wherein the voice coil support by itself prevents airflow communication between at least the first surface and the second surface, and the voice coil support has a monobloc structure made of one solid piece of material, the one solid piece of material not having any hollow space inside the one solid piece of material, with a mechanical mode of vibration at a natural frequency outside of the audible frequency range.