Comparison of the roex and gammachirp filters as representations of the auditory filter.
Comparison of the roex and gammachirp filters as representations of the auditory filter.
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DOI：
10.1121/1.2228539
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发表时间：
2006-09
期刊：
影响因子：
--
通讯作者：
Patterson RD
中科院分区：
文献类型：
--
作者：
Unoki M;Irino T;Glasberg B;Moore BC;Patterson RD
尽管舍入指数（roex）滤波器已成功地用于表示听觉滤波器的幅度响应，但最近对roex（p，w，t）滤波器的研究揭示了两个严重的问题：对陷波噪声掩蔽数据的拟合有些不稳定，除非滤波器被简化为物理上不可实现的形式，并且不存在Roex（p，w，t）滤波器以支持对复杂声音的感知的建模。本文描述了一种与roex（p，w，t）滤波器结构相同的可在时域中实现的压缩伽玛achirp（cGC）滤波器。该并行cGC滤波器的增益和不对称性与roex（p，w，t）滤波器的增益和不对称性相当，但对掩蔽数据的拟合仍然有些不稳定。还将roex（p，w，t）和并行cGC滤波器与级联cGC滤波器进行了比较[Patterson等人，J.声学美国社会114，1529-1542（2003）]，发现其提供了具有少25%的系数的等效拟合。此外，拟合稳定。级联cGC滤波器的优势似乎来自其滤波器高频侧的简约表示。它的结论是，cGC过滤器提供了更好的前景比roex过滤器的听觉滤波器的表示。
Although the rounded-exponential (roex) filter has been successfully used to represent the magnitude response of the auditory filter, recent studies with the roex(p,w,t) filter reveal two serious problems: the fits to notched-noise masking data are somewhat unstable unless the filter is reduced to a physically unrealizable form, and there is no time-domain version of the roex(p,w,t) filter to support modeling of the perception of complex sounds. This paper describes a compressive gammachirp (cGC) filter with the same architecture as the roex(p,w,t) which can be implemented in the time domain. The gain and asymmetry of this parallel cGC filter are shown to be comparable to those of the roex(p,w,t) filter, but the fits to masking data are still somewhat unstable. The roex(p,w,t) and parallel cGC filters were also compared with the cascade cGC filter [Patterson et al., J. Acoust. Soc. Am. 114, 1529–1542 (2003)], which was found to provide an equivalent fit with 25% fewer coefficients. Moreover, the fits were stable. The advantage of the cascade cGC filter appears to derive from its parsimonious representation of the high-frequency side of the filter. It is concluded that cGC filters offer better prospects than roex filters for the representation of the auditory filter.
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影响因子：
2.4
作者：
Baker, RJ;Rosen, S
通讯作者：
Rosen, S
影响因子：
44.1
作者：
Fletcher, H
通讯作者：
Fletcher, H
影响因子：
2.4
作者：
ASSMANN, PF;SUMMERFIELD, Q
通讯作者：
SUMMERFIELD, Q
影响因子：
2.4
作者：
HOUTGAST, T
通讯作者：
HOUTGAST, T
影响因子：
2.4
作者：
GLASBERG, BR;MOORE, BCJ;NIMMOSMITH, I
通讯作者：
NIMMOSMITH, I