公开(公告)号：EP1662842A4

公开(公告)日：2010-03-31

申请号：EP04771642

申请日：2004-08-06

Applicant: YAMAHA CORP

Inventor： TAKAMAI SUSUMU ,  USUI AKIRA

IPC: H04R1/40 ,  H04S7/00 ,  H04R3/12 ,  H04R5/02 ,  H04S3/00 ,  H04S5/02

CPC classification number: H04R5/02 ,  H04R1/403 ,  H04R3/12 ,  H04R2201/401 ,  H04R2203/12 ,  H04R2205/022 ,  H04R2499/15 ,  H04S3/00

Abstract: A multi-channel audio system is constituted using at least one line array speaker unit, in which plural speakers are arrayed in line, wherein the same audio signal is supplied with a prescribed delay time to each of the speakers, thus forming plural sound beams. The plural sound beams are reflected on a wall surface and a ceiling of a room so as to form plural virtual sound sources surrounding a listening position, and emission directions and intensities of the sound beams are controlled so as to localize a phantom at a prescribed position based on the plural virtual sound sources. By appropriately arranging plural line array speaker units horizontally, vertically, and slantingly in such a way that each line array speaker unit forms sound beams distributed and spread in a sectorial form, it is possible to realize a surround audio system having a high degree of freedom with regard to setup positions for forming virtual sound sources.