同相线性相位分频网络研究  

Linear-phase and In-phase Crossover Design

作　　者：王晓楠[1] 沈勇[1] 王旭[1] 王雷[1] 

机构地区：[1]南京大学声学研究所近代声学教育部重点实验室,江苏南京210093

出　　处：《电声技术》2008年第11期20-23,共4页Audio Engineering

基　　金：国家自然科学基金(10774075)

摘　　要：分频网络频率响应与声音重放效果密切相关,科研人员从不同的角度对分频网络的设计进行了大量研究,较多集中于幅频响应。从分频网络的相频响应出发,使用贝塞尔全通滤波器近似线性相位滤波器,并构造了同相分频网络。在此提出的方法同时满足了线性相位和同相两个要求,在保证分频网络的总幅频响应恒定的情况下,改善了相频响应。实验表明,该方法切实可行。The frequency response of the crossover network plays an important role in the reproduced sound quality, and is studied by the scientific researchers from various points, which mostly focus on the amplitude response of the crossover networks. Based on the phase response of the crossover network, the Bessel all-pass filters to approximate filters with linear-phase is used. And a procedure is developed to create in-phase crossover network. This crossover filter insures the total amplitude response constant and optimizes the phase response. An experiment is given to exemplify its feasibility.

关 键 词：贝塞尔全通滤波器 同相 线性相位 

分 类 号：TB556[理学—物理]