Mahajan Yatin, Kim Jeesun, Davis Chris
The MARCS Institute for Brain, Behaviour and Development, Western Sydney University, Penrith, New South Wales, Australia
J Acoust Soc Am. 2017 Aug;142(2):EL190. doi: 10.1121/1.4997603.
Adding frequency modulations (FM) cues to vocoded (AM) speech aids speech recognition for younger listeners. However, this may not be true for older listeners since they have poorer FM detection thresholds. We measured FM detection thresholds of young and older adults; and in a sentence context examined whether adding FM cues to vocoded speech would assist older adults. Young and old participants were presented vocoded sentences in quiet and multitalker-babble with/without FM cues. Older adults had elevated FM detection thresholds but received the same-size FM benefit as younger adults, showing that they have the capacity to benefit from FM speech cues.
为经声码处理（调幅）的语音添加频率调制（调频）线索有助于年轻听众的语音识别。然而，对于年长听众而言可能并非如此，因为他们的调频检测阈值较差。我们测量了年轻人和年长者的调频检测阈值；并在句子语境中研究了为经声码处理的语音添加调频线索是否会帮助年长者。年轻和年长参与者在安静环境以及有/无调频线索的多说话者嘈杂环境中听取经声码处理的句子。年长者的调频检测阈值较高，但获得了与年轻人相同程度的调频益处，这表明他们有能力从调频语音线索中获益。
