Department of Electrical Engineering, The University of Texas at Dallas, Richardson, Texas 75080, USA.
J Acoust Soc Am. 2011 Sep;130(3):1099-102. doi: 10.1121/1.3614539.
The purpose of this study is to determine the relative impact of reverberant self-masking and overlap-masking effects on speech intelligibility by cochlear implant listeners. Sentences were presented in two conditions wherein reverberant consonant segments were replaced with clean consonants, and in another condition wherein reverberant vowel segments were replaced with clean vowels. The underlying assumption is that self-masking effects would dominate in the first condition, whereas overlap-masking effects would dominate in the second condition. Results indicated that the degradation of speech intelligibility in reverberant conditions is caused primarily by self-masking effects that give rise to flattened formant transitions.
本研究旨在通过人工耳蜗植入者确定混响自掩蔽和重叠掩蔽效应对言语可懂度的相对影响。在两种情况下呈现句子，其中一种情况下混响的辅音段被替换为清晰的辅音，另一种情况下混响的元音段被替换为清晰的元音。基本假设是在第一种情况下，自掩蔽效应占主导地位，而在第二种情况下，重叠掩蔽效应占主导地位。结果表明，混响条件下言语可懂度的降低主要是由于自掩蔽效应导致的共振峰过渡变平。
