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设扬声器是线性定常系统。它的系统函数H(ω)可以用振幅特性A(ω)和相位特性φ(ω)或群时延特性τ(ω)来表示: H(ω)=A(ω)·exp[jφ(ω)]
Let the speaker be a linear, stationary system. Its system function H (ω) can be expressed by the amplitude characteristic A (ω) and the phase characteristic φ (ω) or the group delay characteristic τ (ω): H (ω) = A )]