| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide technical means which reduces a standing wave of each mode ranging from a low frequency to a high frequency without increasing burden of transportation or installation, or manufacturing cost. <P>SOLUTION: A cavity 26-N is provided inside lateral faces 21, 22, 23, and 24 of an acoustic structure 6. When a plurality of the acoustic structures 6 are arranged side by side between a wall 1 and a wall 2 of a room 90, a standing wave reduction panel 10 having a cavity 26'-k with a length D1 which is about the same length as a distance D1 between the wall 1 and wall 2 is formed. When a standing wave SW<SB POS="POST">1</SB>enters into the cavity 26'-k, a standing wave SW<SB POS="POST">1</SB>' with about the same frequency as a standing wave W<SB POS="POST">1</SB>and a phase rotated by 180 degrees to the standing wave W<SB POS="POST">1</SB>is emitted from the cavity 26'-k and gaps G1 and G2. Thus, the standing wave SW<SB POS="POST">1</SB>is reduced. <P>COPYRIGHT: (C)2012,JPO&INPIT |
