Communication device for transmitting audio information to a use

Electrical audio signal processing systems and devices – Sound effects – Reverberators

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381 68, 3404071, H04R 2500

Patent

active

053373642

ABSTRACT:
A communication device for transmitting audio information includes a compact casing which houses processing circuitry. The processing circuitry converts input audio signals into transducer driving signals. A miniaturized microphone is mounted in the casing for receiving the input audio signals. The input audio signals are then amplified and filtered to appropriate signal levels by the processing circuitry. Once the input audio signals have been processed in this manner they are applied to a driver which outputs transducer driving signals analogous to the input audio signals. The transducer driving signals are received by a transducer assembly worn by a user and energize a pair of coils located on opposite sides of an armature forming part of the transducer assembly. The electromagnetic forces generated by the coils when energized cause the armature to move. Movement of the armature in turn drives a plunger so that the plunger moves in a vibrational pattern analogous to the input audio signals. The plunger contacts the skin of the user so that the vibrational pattern is received by cutaneous nerve receptors on the user's body or by the user's ears via bone conduction. This vibrational information is then transmitted to the user's brain for processing. A pair of springs are located on opposite sides of the armature and bias the armature and plunger so that they move to a datum in the absence of driving signals. The spring also oppose movement of the armature and plunger when driven by the coils.

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Feinwerktechnik & Messtechnik, vol. 98, No. 7/8, Aug. 15, 1990, DE pp. 291-293; Blume: `Besser horen mil elktromagnetischen Wandlersystemen`.

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