title: Does cognitive function predict frequency compressed speech recognition in listeners with normal hearing and normal cognition?
abstract: OBJECTIVE
  The aim was to investigate the relationship between cognitive ability and frequency compressed speech recognition in listeners with normal hearing and normal cognition.
  
  
  METHODS
  Speech-in-noise recognition was measured using Institute of Electrical and Electronic Engineers sentences presented over earphones at 65 dB SPL and a range of signal-to-noise ratios. There were three conditions: unprocessed, and at frequency compression ratios of 2:1 and 3:1 (cut-off frequency, 1.6 kHz). Working memory and cognitive ability were measured using the reading span test and the trail making test, respectively.
  
  
  METHODS
  Participants were 15 young normally-hearing adults with normal cognition.
  
  
  RESULTS
  There was a statistically significant reduction in mean speech recognition from around 80% when unprocessed to 40% for 2:1 compression and 30% for 3:1 compression. There was a statistically significant relationship between speech recognition and cognition for the unprocessed condition but not for the frequency-compressed conditions.
  
  
  CONCLUSIONS
  The relationship between cognitive functioning and recognition of frequency compressed speech-in-noise was not statistically significant. The findings may have been different if the participants had been provided with training and/or time to 'acclimatize' to the frequency-compressed conditions.
authors.affiliation: School of Psychological Sciences, University of Manchester, UK. Rachel.Ellis@liu.se
authors.forename: Rachel J
authors.initials: RJ
authors.lastname: Ellis
authors.forename: Kevin J
authors.initials: KJ
authors.lastname: Munro
mesh_terms: D000161:Acoustic Stimulation; D000328:Adult; D000704:Analysis of Variance; D001302:Audiometry, Speech; D003071:Cognition; D005260:Female; D006801:Humans; D008297:Male; D008568:Memory; D009622:Noise / Q000009:adverse effects; D010470:Perceptual Masking; D021641:Recognition, Psychology; D017603:Signal Detection, Psychological; D013067:Speech Perception; D014145:Trail Making Test