Patent ID: 9191769
Filing Date: 2015-11-17
Classification: H04S

Abstract:
1. A method of reproducing low frequency sound in a rectangular room for reproducing sound from audio signals via at least three “main” channels and a “bass effects” channel in association with a video playback screen, which method comprises using at least five loudspeakers specialized in reproducing audio frequencies lower than 120 Hz, placing four loudspeakers selected from said at least five loudspeakers in four respective corners of said rectangular room, and placing at least one loudspeaker selected from said at least five loudspeakers in the proximity of said video playback screen, the method being characterized by selecting from said four loudspeakers first and second loudspeakers that are arranged in corners of said rectangular room that are furthest away from said video playback screen, configuring said first and second loudspeakers in such a manner that they receive a signal constituted by the sum of the signals for the other loudspeakers but with inverted polarity, with individual delays, and lowpass filtering and choosing said first and second loudspeakers in such a manner that they have a resonant frequency higher than 120 Hz.