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Evaluation of Temporal Processing Abilities in Competing Noise.

Udit Saxena1, Venkata Damarla1, S B Rathna Kumar2

  • 1Department of Audiology, MAA Institute of Speech and Hearing, Hyderabad, India.

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|February 6, 2023
PubMed
Summary

Background noise significantly impairs temporal processing in children and adults, with children showing greater deficits. Temporal processing abilities in noise approach adult levels by age 10-11 years.

Keywords:
Gap detection thresholdSignal-to-noise ratioTemporal processing

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Area of Science:

  • Auditory neuroscience
  • Psychoacoustics
  • Developmental audiology

Background:

  • Temporal processing is crucial for everyday listening, including speech perception.
  • While signal-to-noise ratio (SNR) is vital for speech, its impact on temporal processing is less understood.
  • Understanding these effects is key to addressing auditory challenges in noisy environments.

Purpose of the Study:

  • To investigate the influence of varying signal-to-noise ratios (SNRs) on temporal processing abilities.
  • To compare the effects of noise on temporal processing in children and adults.
  • To determine the age at which children's temporal processing in noise resembles adult performance.

Main Methods:

  • Examined Gap Detection Thresholds (GDT) in 45 participants (25 children, 20 adults) with normal hearing.
  • Measured GDT under five conditions: quiet, +10 dB SNR, +5 dB SNR, 0 dB SNR, and -5 dB SNR.
  • Analyzed GDT differences between age groups and across varying noise levels.

Main Results:

  • Gap Detection Thresholds significantly increased with decreasing SNR (from +10 dB to -5 dB) in both children and adults.
  • Compared to quiet, elevated GDTs were observed across most SNRs in children and adults, except at +10 dB SNR for some groups.
  • Children exhibited greater impairment in temporal processing under noisy conditions than adults.

Conclusions:

  • Background noise significantly degrades temporal processing in both children and adults.
  • Children's temporal processing is more susceptible to noise, likely due to less developed temporal resolving abilities.
  • Children aged 10-11 years demonstrate near-adult-like temporal processing performance in the presence of background noise.