Patent ID: 6275580
Filing Date: 2001-08-14
Classification: H04R

Abstract:
An apparatus for electronic communication, comprising:a housing;a uni-directional microphone mounted in said housing with its sound-responsive element facing outwardly thereof, said uni-directional microphone having a central axis that defines a region of maximum sensitivity to sound waves incident on said uni-directional microphone; andat least two loudspeakers mounted in said housing with their mouths facing outwardly thereof, said loudspeakers being electrically connected in phase opposition relative to each other, said loudspeakers having substantially similar sound intensity dispersion patterns and being positioned symmetrically relative to the central axis of said microphone, such that equal and corresponding portions of the loudspeaker sound intensity dispersion patterns of said loudspeakers are positioned symmetrically about said central axis whereby acoustic coupling between said loudspeakers and said microphone is substantially reduced.