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Summary

In challenging listening, people favor one talker. This study found listeners preferred the male talker and the one on their right, especially in difficult acoustic conditions.

Keywords:
Divided listeningListening effortSpeech recognition

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Area of Science:

  • Auditory perception
  • Psychoacoustics
  • Human attention

Background:

  • Divided listening is challenging, often leading to attention bias towards one of two simultaneous talkers.
  • Factors influencing talker preference in complex auditory environments require further investigation.

Purpose of the Study:

  • To determine if talker onset/offset, sex, or location influences talker preference in challenging listening.
  • To assess how acoustic conditions impact the asymmetry of divided listening.

Main Methods:

  • Participants with normal hearing performed word recognition from two talkers at different locations (+45° and -45° azimuth).
  • Experiments manipulated talker sex, sound levels (65 and 35 dB SPL), and sentence duration.
  • Talker preference was measured by word recognition accuracy.

Main Results:

  • Listeners favored the male talker over the female talker, with greater preference at lower sound levels (35 dB SPL).
  • A non-significant right-ear advantage was observed when talker locations were switched or talkers were of the same sex.
  • Talker onset/offset differences under 52 ms did not explain the observed intelligibility asymmetry.

Conclusions:

  • In difficult listening, listeners exhibit a bias towards the talker on their right, potentially influenced by voice characteristics.
  • Auditory asymmetry in divided listening is exacerbated by challenging acoustic scenarios.
  • Talker sex and spatial location are significant modulators of talker preference in dichotic listening tasks.