基于IIR模型扬声器系统空间响应均衡算法研究

由于扬声器系统在房间内向空间辐射声波时,其空间不同位置点处的幅度响应差异较大,因此需要对系统的空间响应进行均衡处理。目前,已有的基于共极点模型的传统均衡算法存在着改变均衡频点之外其他频带的幅度响应特性,针对这一缺陷,提出了基于IIR模型的均衡算法,并通过仿真和测量实验对比了基于共极点模型和基于IIR模型算法的响应均衡效果。实验结果表明,基于IIR模型的均衡方法能够实现空间多个位置点的幅度响应均衡,且不会影响均衡频点之外其他频带的幅度响应特性。

Study of Loudspeaker-room Equalization of IIR Filter Structure

The multipoint equalization technique is studied due to deviations of loudspeaker response at different points in a room. The generally known method using the common acoustical poles of room transfer functions may cause degradations at other frequency ranges. To solve this problem, a novel solution achieved with an infinite impulse response （IIR） filter is proposed. Results obtained from computer simulations and measurements of a real - time implementation show that this method can greatly suppress the peaks due to resonance while not affect the flatness of amplitude response at other frequency bands.