REVERBERANT OVERLAP-MASKING AND SELF-MASKING IN CONSONANT IDENTIFICATION
REVERBERANT OVERLAP-MASKING AND SELF-MASKING IN CONSONANT IDENTIFICATION
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DOI：
10.1121/1.398740
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发表时间：
1989-10-01
影响因子：
2.4
通讯作者：
TUCKER, FM
中科院分区：
文献类型：
--
作者：
NABELEK, AK;LETOWSKI, TR;TUCKER, FM
10名听力正常的受试者被评估了混响对辅音识别的两种影响：（1）前一个辅音的能量在后一个辅音上的重叠，称为“混响掩蔽”;（2）每个辅音内部的能量的内部时间涂抹，称为“自掩蔽”。“刺激是八个辅音/p，t，k，f，m，n，l，w/。辅音在/s-at/语境中被说出（实验1），并由语音合成器在s-at/和/-at/语境中产生（实验2）。在这两个实验中，辅音的识别在四种情况下进行了测试：（1）安静，没有退化;（2）有一个喋喋不休的声音;（3）有噪音，这两个实验分别是自然或合成的/s/;（4）有房间混响。自然和合成音节的结果表明，混响识别辅音后/s/的效果是不可比拟的掩蔽由/s/-频谱形状的噪声或牙牙学语。此外，合成音节的结果表明，大多数错误的混响的/s-at/上下文类似于两种情况下的错误之和：（1）与/s/形噪声造成重叠掩蔽;（2）与混响造成自掩蔽内每个辅音。
Two effects of reverberation on the identification of consonants were evaluated for ten normal hearing subjects: (1) the overlap of energy of a preceding consonant on the following consonant, called "overlap-masking"; and (2) the internal temporal smearing of energy within each consonant, called "self-masking." The stimuli were eight consonants/p,t,k,f,m,n,l,w/. The consonants were spoken in /s-at/ context (experiment 1) and generated by a speech synthesizer in s-at/ and /-at/ contexts (experiment 2). In both experiments, identification of consonants was tested in four conditions: (1) quiet, without degradations; (2) with a babble of voices; (3) with noise that was shaped like either natural or synthetic /s/ for the two experiments, respectively; and (4) with room reverberation. The results for the natural and synthetic syllables indicated that the effect of reverberation on identification of consonants following /s/ was not comparable to masking by either the /s/-spectrum-shaped noise or the babble. In addition, the results for the synthetic syllables indicated that most of the errors in reverberation for the /s-at/ context were similar to a sum of errors in two conditions; (1) with /s/-shaped noise causing overlap masking; and (2) with reverberation causing self-masking within each consonant.