ELECTROSTATIC SPEAKER WITH MOVEABLE DIAPHRAGM EDGES

摘要

An electrostatic speaker device, comprising a first stator which is substantially acoustically transparent to audio output and a second stator spaced from the first stator at a distance which defines a charge capacitive region between the first and second stators which operates as an electrostatic field capable of driving a charge sensitive diaphragm as a speaker element. At least one charge sensitive diaphragm is sandwiched between the first and second stators and includes a conductive layer for being responsive to the electrostatic field. Support structure is coupled to at least one of the first and second stators and is attached at a portion of a perimeter of the diaphragm in a manner that imposes tension across the diaphragm to enable the first and second stators to drive the diaphragm as the speaker element. At least a portion of the diaphragm includes a diagonal which is unstressed and at least one edge unattached to allow movement at the at least one edge of the diaphragm in response to the electrostatic field for enhancement of low frequency vibration within an audio frequency range. Electrical contacts are coupled to the respective first and second stators for coupling to an audio signal source.