0 Hz Р 19 ( 1 , 2 , 0 ) 58 Hz Р 20 ( 2 , 0 , 1 ) 73 Hz Р 21 ( 0 , 2 , 1 ) 66 Hz Р 22 ( 1 , 0 , 2 ) 91 Hz Р 23 ( 2 , 1 , 0 ) 64 Hz Р 24 ( 2 , 2 , 1 ) 89 Hz Р 25 ( 2 , 1 , 2 ) 107 Hz Р 26 ( 1 , 2 , 2 ) 104 Hz Р Рa. Following 3 cases are the worst. Р 1) find isolated frequency mode from others. Р 2) find the mode which shows same frequency. Р 3) find pair mode which differences of frequency is below 3Hz. Рb. Mode 1,2,3,8,9 and 10 can be the worst cases. Р Р2. Counter resolution Рa. make reflection and absorb board base on calculation. And attach it on the wall. Р Р Р Р Р Р Р B = 0.15 A ~ 0.3A Р A = 344 / (2x normal frequency), [m] Р the board should have many holes and filled with felt. Р Рb. others Р ground : carpete Р wall : thick curtain Р displace audio system and sofa farther from walls.
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