Background noise can enhance cortical auditory evoked potentials under certain conditions

Melissa A. Papesh, Curtis Billings, Lucas S. Baltzell

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

Objective: To use cortical auditory evoked potentials (CAEPs) to understand neural encoding in background noise and the conditions under which noise enhances CAEP responses. Methods: CAEPs from 16 normal-hearing listeners were recorded using the speech syllable/ba/presented in quiet and speech-shaped noise at signal-to-noise ratios of 10 and 30 dB. The syllable was presented binaurally and monaurally at two presentation rates. Results: The amplitudes of N1 and N2 peaks were often significantly enhanced in the presence of low-level background noise relative to quiet conditions, while P1 and P2 amplitudes were consistently reduced in noise. P1 and P2 amplitudes were significantly larger during binaural compared to monaural presentations, while N1 and N2 peaks were similar between binaural and monaural conditions. Conclusions: Methodological choices impact CAEP peaks in very different ways. Negative peaks can be enhanced by background noise in certain conditions, while positive peaks are generally enhanced by binaural presentations. Significance: Methodological choices significantly impact CAEPs acquired in quiet and in noise. If CAEPs are to be used as a tool to explore signal encoding in noise, scientists must be cognizant of how differences in acquisition and processing protocols selectively shape CAEP responses.

Original languageEnglish (US)
Pages (from-to)1319-1330
Number of pages12
JournalClinical Neurophysiology
Volume126
Issue number7
DOIs
StatePublished - Jul 1 2015

Fingerprint

Auditory Evoked Potentials
Noise
Signal-To-Noise Ratio
Hearing

Keywords

  • Electroencephalography
  • Event related potential
  • Hearing
  • Human
  • Presentation rate
  • Speech

ASJC Scopus subject areas

  • Clinical Neurology
  • Neurology
  • Physiology (medical)
  • Sensory Systems
  • Medicine(all)

Cite this

Background noise can enhance cortical auditory evoked potentials under certain conditions. / Papesh, Melissa A.; Billings, Curtis; Baltzell, Lucas S.

In: Clinical Neurophysiology, Vol. 126, No. 7, 01.07.2015, p. 1319-1330.

Research output: Contribution to journalArticle

Papesh, Melissa A. ; Billings, Curtis ; Baltzell, Lucas S. / Background noise can enhance cortical auditory evoked potentials under certain conditions. In: Clinical Neurophysiology. 2015 ; Vol. 126, No. 7. pp. 1319-1330.
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