Robust diaphragm for an acoustic device

摘要

A rigid, flat plate diaphragm for an acoustic device is illustrated. The internal supporting structure of the diaphragm provides a combination of torsional and translational stiffeners, which resemble a number of crossbars. These stiffeners brace and support the diaphragm motion, thus causing its response to not be adversely affected by fabrication stresses and causing it to be very similar in dynamic response to an ideal flat plate operating in a frequency range that extends well beyond the audible.

主权项

1. An acoustic diaphragm having a dynamic response extending throughout the audible range, comprising:
a rigid plate shaped member which extends in a plane, a torsional spring having a structure which extends from the plane, and which has a cross section which tunes a resonant frequency of the acoustic diaphragm, which supports the rigid plate for pivotal movement, and torsional and translational stiffeners extending from the plane, configured to stiffen the rigid plate-shaped member and control a static deflection of the rigid plate-shaped member due to residual manufacturing stress.