Gilbers Steven, Fuller Christina, Gilbers Dicky, Broersma Mirjam, Goudbeek Martijn, Free Rolien, Başkent Deniz
Center for Language and Cognition Groningen, Department of Applied Linguistics, University of Groningen, The Netherlands.
Department of Otorhinolaryngology/Head and Neck Surgery, University Medical Center Groningen, The Netherlands.
Iperception. 2015 Oct 18;6(5):0301006615599139. doi: 10.1177/0301006615599139. eCollection 2015 Oct.
In cochlear implants (CIs), acoustic speech cues, especially for pitch, are delivered in a degraded form. This study's aim is to assess whether due to degraded pitch cues, normal-hearing listeners and CI users employ different perceptual strategies to recognize vocal emotions, and, if so, how these differ. Voice actors were recorded pronouncing a nonce word in four different emotions: anger, sadness, joy, and relief. These recordings' pitch cues were phonetically analyzed. The recordings were used to test 20 normal-hearing listeners' and 20 CI users' emotion recognition. In congruence with previous studies, high-arousal emotions had a higher mean pitch, wider pitch range, and more dominant pitches than low-arousal emotions. Regarding pitch, speakers did not differentiate emotions based on valence but on arousal. Normal-hearing listeners outperformed CI users in emotion recognition, even when presented with CI simulated stimuli. However, only normal-hearing listeners recognized one particular actor's emotions worse than the other actors'. The groups behaved differently when presented with similar input, showing that they had to employ differing strategies. Considering the respective speaker's deviating pronunciation, it appears that for normal-hearing listeners, mean pitch is a more salient cue than pitch range, whereas CI users are biased toward pitch range cues.
在人工耳蜗(CI)中,声学语音线索,尤其是音高线索,是以一种退化的形式传递的。本研究的目的是评估由于音高线索退化,听力正常的听众和人工耳蜗使用者是否采用不同的感知策略来识别声音情感,如果是,这些策略有何不同。语音演员被录制下来,用四种不同的情感朗读一个临时编造的词:愤怒、悲伤、喜悦和宽慰。对这些录音的音高线索进行了语音分析。这些录音被用来测试20名听力正常的听众和20名人工耳蜗使用者的情感识别能力。与之前的研究一致,高唤醒度情感比低唤醒度情感具有更高的平均音高、更宽的音高范围和更突出的音高。关于音高,说话者不是根据效价而是根据唤醒度来区分情感。即使在呈现人工耳蜗模拟刺激时,听力正常的听众在情感识别方面也优于人工耳蜗使用者。然而,只有听力正常的听众识别一位特定演员的情感比识别其他演员的情感更差。当呈现相似的输入时,两组的表现不同,这表明他们必须采用不同的策略。考虑到各自说话者发音的差异,对于听力正常的听众来说,平均音高似乎比音高范围更显著,而人工耳蜗使用者则倾向于音高范围线索。