A.>20000Hz;<20Hz B.<20000Hz;>20Hz C.>20Hz;<20000Hz D.<20Hz;>20000Hz
A.2500~3500;12000~13000 B.3500;12000 C.3000~3500;10000~14000 D.2500;13000
A.20Hz~20000Hz B.200Hz~20000Hz C.125Hz~8000Hz D.250Hz~8000Hz