Patent ID: 6343132
Filing Date: 2002-01-29
Classification: H04R

Abstract:
A loudspeaker apparatus for converting a first audio signal to audible sound comprising:a bottom; a front perpendicular to said bottom; a band suppression circuit operable to suppress a first predetermined frequency band in the first audio signal to produce a second audio signal; a first speaker unit, connected to said band suppression circuit, operable to convert the second audio signal to a first sound wherein the first predetermined frequency band is suppressed and to emit the first sound from said front; a band pass filter operable to pass a second predetermined frequency band in the first audio signal to produce a third audio signal; a second speaker unit, connected to said band pass filter, operable to convert the third audio signal to a second sound wherein the second predetermined band is audible, and to emit the second sound; and a dispersing device oriented to disperse and output sound from said second speaker unit in a direction parallel to both said front and said bottom and to cover said second speaker unit to block sound from said second speaker unit from radiating from said front, and comprising opposing end openings oriented to output sound in a direction parallel to both said front and said bottom, and a sound reflecting member formed in a shape that widens from the center of said dispersing device outward toward said opposing end openings of said dispersing device and positioned to reflect the second sound at least one time in said dispersing device, said sound reflecting member comprising a first top plate and first and second side walls, said first and second side walls extending by a predetermined length longer than half of a sound wave length corresponding to the second predetermined band and diverging from each other at a first predetermined angle.