Electrical audio signal processing systems and devices – Electro-acoustic audio transducer – Having electrostatic element
Patent
1991-04-18
1993-03-23
Ng, Jin F.
Electrical audio signal processing systems and devices
Electro-acoustic audio transducer
Having electrostatic element
381 96, 381194, H04R 2500
Patent
active
051971046
ABSTRACT:
An electro-acoustic system including an amplifier circuitry for amplifying an input signal to provide an amplified signal; and electrodynamic loudspeaker having at least one magnet, a diaphragm connected to a coil support, a voice coil for driving a diaphragm in response to the amplified signal with the presence of the magnet, and an electromagnetic impedance sensor coil partically offset with the at least one magnet for providing a feedback signal proportional to its electromagnetic impedance which is a function of both the moving speed and the displacement of the diaphragm; a negative feedback circuitry processing the feedback signal and providing a negative feedback signal; and a summing circuitry for combining the input signal and the negative feedback signal and sending a combined signal to the amplifier circuitry, which in turn provides an amplified combined signal to the electrodynamic loudspeaker to thereby reduce the distortion of the electrodynamic loudspeaker.
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Lakatos Josef
Le Huyen D.
Ng Jin F.
Rozsa Thomas I.
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