Digital and analog directional microphone
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Jul 4, 2000
Grant Date -
N/A
app pub date -
Dec 22, 1997
filing date -
Dec 22, 1997
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A directional microphone is disclosed. The shotgun microphone has an elongated tube which is designed to control directivity at frequencies above a predetermined frequency and at least four reference microphones spatially arranged about said shotgun microphone. A signal processor, which is electrically connected to said shotgun and reference microphones, generates interference cancelling signals from the portions of the signals from the reference microphones which have frequencies generally below the predetermined frequency. The signal processor combines the cancelling signals with the signal from the shotgun microphone to generate an output signal in which signals originating from in front of the directional microphone in a direction along the longitudinal axis of said tube are enhanced and signals originating from locations other than in front of the directional microphone in a direction along the longitudinal axis of said tube are suppressed.
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