Dichotic spectral integration range for consonant recognition in listeners with normal hearing.
Dichotic spectral integration range for consonant recognition in listeners with normal hearing.
复制标题
DOI：
10.3389/fpsyg.2022.1009463
复制
发表时间：
2022
影响因子：
3.8
通讯作者：
Morgan, Dani
中科院分区：
文献类型：
--
作者：
Yoon, Yang-Soo;Morgan, Dani
关键词：
对听力正常的听者进行辅音识别的双谱积分范围（DSIR）测量。DSIR定义为当同一辅音的低频信息呈现给另一只耳朵时，一只耳朵识别辅音所需的0 ~ 8000 Hz频段的频率范围。在三种信号处理条件下测量DSIR:(1)未处理，(2)目标：增强6 dB的目标光谱-时间区域，负责辅音识别，以及(3)目标减去冲突：增强的目标区域减去增加混淆的光谱-时间区域。每个辅音分别以250,500,750和1000hz的截止频率进行低通滤波，然后呈现在左耳或低频（LF）耳中。为了创造双重听力，将相同的辅音同时呈现给右耳或高频耳。这是高通滤波，初始截止频率为7,000 Hz，使用自适应程序进行调整，以找到99.99%正确辅音识别的最大高通截止频率。平均dsir范围从3,198-8,000 Hz到4,668-8,000 Hz（即中高频是不必要的），这取决于LF耳中的低频信息。随着低频信息的增加，DSIRs变窄（即需要更少的频率信息）。然而，除了250 Hz的低通截止频率外，平均DSIRs不受信号处理的显著影响。单个辅音分析显示，/ta/、/da/、/sa/和/za/需要最小的DSIR，而/ka/、/ga/、/fa/和/va/需要最大的DSIR。除了目标冲突条件下的250 vs 1,000 Hz， DSIRs也随着两种信号处理条件下低频信息的增加而缩小。结果表明，如果跨耳整合互补的频谱信息，则可以在大量频谱信息缺失的情况下实现辅音识别。无论信号处理如何，DSIR都是辅音特定的，并且相对一致。如果另一只耳朵的低光谱信息有限，该结果将有助于确定一只耳朵识别辅音所需的最小光谱范围。
Dichotic spectral integration range, or DSIR, was measured for consonant recognition with normal-hearing listeners. DSIR is defined as a frequency range needed from 0 to 8,000 Hz band in one ear for consonant recognition when low-frequency information of the same consonant was presented to the opposite ear. DSIR was measured under the three signal processing conditions: (1) unprocessed, (2) target: intensified target spectro-temporal regions by 6 dB responsible for consonant recognition, and (3) target minus conflicting: intensified target regions minus spectro-temporal regions that increase confusion. Each consonant was low-pass filtered with a cutoff frequency of 250, 500, 750, and 1,000 Hz, and then was presented in the left ear or low-frequency (LF) ear. To create dichotic listening, the same consonant was simultaneously presented to the right ear or high-frequency (HF) ear. This was high-pass filtered with an initial cutoff frequency of 7,000 Hz, which was adjusted using an adaptive procedure to find the maximum high-pass cutoff for 99.99% correct consonant recognition. Mean DSIRs spanned from 3,198–8,000 Hz to 4,668–8,000 Hz (i.e., mid-to-high frequencies were unnecessary), depending on low-frequency information in the LF ear. DSIRs narrowed (i.e., required less frequency information) with increasing low-frequency information in the LF ear. However, the mean DSIRs were not significantly affected by the signal processing except at the low-pass cutoff frequency of 250 Hz. The individual consonant analyses revealed that /ta/, /da/, /sa/, and /za/ required the smallest DSIR, while /ka/, /ga/, /fa/, and /va/ required the largest DSIRs. DSIRs also narrowed with increasing low-frequency information for the two signal processing conditions except for 250 vs. 1,000 Hz under the target-conflicting condition. The results suggest that consonant recognition is possible with large amounts of spectral information missing if complementary spectral information is integrated across ears. DSIR is consonant-specific and relatively consistent, regardless of signal processing. The results will help determine the minimum spectral range needed in one ear for consonant recognition if limited low spectral information is available in the opposite ear.
登录
查看更多内容
影响因子：
1.9
作者：
Obuchi C;Shiroma M;Ogane S;Kaga K
通讯作者：
Kaga K
影响因子：
3.7
作者：
Gifford RH;Dorman MF
通讯作者：
Dorman MF
DOI：
10.1080/00437956.1950.11659381
发表时间：
1950-12-01
影响因子：
0.6
作者：
Hayden, Rebecca E.
通讯作者：
Hayden, Rebecca E.
影响因子：
3.7
作者：
Cullington HE;Zeng FG
通讯作者：
Zeng FG
DOI：
10.1037/0278-7393.17.1.152
发表时间：
1991-01-01
影响因子：
2.6
作者：
GOLDINGER, SD;PISONI, DB;LOGAN, JS
通讯作者：
LOGAN, JS