Appeal No. 2000-1888
Application No. 08/885,984
Our review of McAteer confirms that the reference relates to
a directional microphone including a housing with two sound ports
and a microphone element for use in a lap-top computer. McAteer
discloses that one of the properties of directional microphones
is their unresponsiveness to sounds coming from certain
directions or nulls (col. 3, lines 34-36). McAteer further
teaches that by changing the spatial separation (d) between the
sound ports, the acoustic resistance of the element or the volume
of the acoustic region behind the element (V) the directivity
pattern of the microphone can be changed to cardioid, super
cardioid or hypercardioid (col. 4, lines 10-23). These different
directivity patterns are described as having different
characteristics that affect the location of the nulls, power and
front-to-back response ratio (col. 4, lines 23-30). Therefore,
we find that, as set forth by the Examiner (answer, pages 7 & 8),
any changes made to d and V are in effect changes made to the
housing and result in directional responses making the microphone
unresponsive to sounds coming from other directions.
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