Directional microphone system

Electrical audio signal processing systems and devices – Hearing aids – electrical – Directional

Reexamination Certificate

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Details

C381S092000, C381S357000

Reexamination Certificate

active

07116792

ABSTRACT:
A second-order microphone system is constructed of two null-less first-order microphone elements. The null-less first-order microphone elements prevent the degradations that occur in performance when a second-order microphone system is used at the side of a person's head.

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patent: 6954535 (2005-10-01), Arndt et al.

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