Determining the energetic and informational components of speech-on-speech masking.
Determining the energetic and informational components of speech-on-speech masking.
复制标题
DOI：
10.1121/1.4954748
复制
发表时间：
2016-07
期刊：
影响因子：
--
通讯作者：
Best V
中科院分区：
文献类型：
--
作者：
Kidd G Jr;Mason CR;Swaminathan J;Roverud E;Clayton KK;Best V
研究了由两个或四个独立的语音掩蔽条件下的目标语音识别。在参考条件下，掩蔽者与目标共处一处，掩蔽者说话者与目标性别相同，掩蔽言语可理解。比较条件，旨在提供从掩蔽释放，包括不同性别的目标和掩蔽者说话，掩蔽语音的时间反转，掩蔽者从目标的空间分离。在所有比较条件下，均发现从掩蔽中显著释放。为了确定掩蔽的这些减少是否可以归因于能量掩蔽的差异，应用理想时频分离（ITFS）处理，使得掩蔽能量占主导地位的目标能量的时频单元被去除。剩下的目标主导的“一瞥”被重新组合成刺激措施。使用这些重新合成的ITFS处理的刺激测量的语音接收阈值对于参考条件和比较条件是相同的，支持跨条件的能量掩蔽量是相同的结论。这些结果表明，在所有比较条件下发现的掩蔽大量释放主要是由于信息掩蔽减少。此外，观察到的较大个体差异通常与三种掩蔽释放条件相关。
Identification of target speech was studied under masked conditions consisting of two or four independent speech maskers. In the reference conditions, the maskers were colocated with the target, the masker talkers were the same sex as the target, and the masker speech was intelligible. The comparison conditions, intended to provide release from masking, included different-sex target and masker talkers, time-reversal of the masker speech, and spatial separation of the maskers from the target. Significant release from masking was found for all comparison conditions. To determine whether these reductions in masking could be attributed to differences in energetic masking, ideal time-frequency segregation (ITFS) processing was applied so that the time-frequency units where the masker energy dominated the target energy were removed. The remaining target-dominated “glimpses” were reassembled as the stimulus. Speech reception thresholds measured using these resynthesized ITFS-processed stimuli were the same for the reference and comparison conditions supporting the conclusion that the amount of energetic masking across conditions was the same. These results indicated that the large release from masking found under all comparison conditions was due primarily to a reduction in informational masking. Furthermore, the large individual differences observed generally were correlated across the three masking release conditions.