Appeal No. 1999-2339
Application No. 08/598,098
added].
Claim 1 next calls for a signal processing unit for
receiving the electrical signals. This is described by Elko at
column 2, lines 61-66, wherein the processing unit receives the
electrical signals at analysis time intervals and, during each
analysis time interval, “a set of weighting signals are formed to
adjust the directional response pattern of the array and the
received sound signals are combined with the weighting signals to
produce an output signal substantially representative of the
sound signal from the preferred location sound source in each
analysis time interval.” Thus, the signal processing unit of
Elko processes the electrical signals according to a specific
sound direction and produces a specific direction and width sound
signal, as claimed.
Appellant argues that Elko teaches that a directional
response pattern is “adaptively adjusted” during successive time
intervals to maintain the operator location in the main beam of
the pattern while developing null points in the directional
response pattern at each noise source although the noise source
may move and that, unlike the presently claimed invention, “Elko
is noise source dependent” [principal brief-page 4]. However,
-4–
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