Appeal No. 95-4372
Application No. 08/043,610
sound waves in the mid- and high-frequency ranges on the principal
speaker axis and increase those on both sides of the principal axis.
Representative independent claim 16 is reproduced as
follows:
16. A speaker system for reproducing an audio signal,
comprising:
a power amplifier for providing the audio signal;
a first speaker for receiving the audio signal from said
power amplifier;
phase shifter means, coupled to receive the audio signal
from the power amplifier, for shifting a phase of the received audio
signal between ±120E and ±180E in the mid- and high-frequency ranges;
and
a second speaker for receiving the phase-shifted audio
signal from said phase shifter means, a composite sound pressure wave
of said first and second speakers decreasing on a principal axis (0E)
which corresponds to a line of symmetry of respective radiating axes
of said first and second speakers; wherein said first and second
speakers are mounted in a single cabinet such that the respective
distances from said first and second speakers to a listener are equal
to each other, and wherein the speaker system reproduces the audio
signal such that the principal axis is directed towards the listener.
The examiner relies on the following references:
Tominari 4,873,722 Oct. 10, 1989
Kendall et al. (Kendall) 5,121,433 Jun. 9, 1992
Kondrat0ev (USSR) 1,248,0802 Jul. 30, 1986
Our understanding of this reference is based on an English2
translation thereof prepared by the United States Patent and
2
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