HEARING LOSS AND THE PERCEPTION OF COMPLEX SOUNDS

  • Leek, Marjorie (PI)

Project: Research project

Project Details

Description

Sensorineural hearing impairment is characterized not only by a
reduction in auditory sensitivity, but also by a loss in frequency
selectivity due to abnormally wide auditory filters in the damaged
cochlea. The possible functional consequences of such a deficit
include an inability to adequately analyze the spectral detail of
complex sounds, an unfavorable signal-to-noise ratio at the outputs
of the auditory filters, and abnormal temporal interactions among
adjacent spectral components. These factors may combine to
interfere with the understanding of speech, particularly in noisy
environments. The long-term goals of this series of experiments
are to more fully describe the characteristics of reduced frequency
selectivity associated with various degrees of sensitivity loss and
with the normal aging process, and to assess the relationship
between auditory filter bandwidths and the ability to identify and
discriminate broadband harmonic complexes. Frequency selectivity
will be assessed in hearing-impaired listeners using a notched
noise masking method to derive the shape and bandwidths of auditory
filters. Measures of the internal spectral representation of
complex sounds, identification of harmonic complexes, and
discrimination of phase changes among the components of harmonic
complexes will be evaluated in terms of the magnitudes of the
filter bandwidths. In addition, experiments are proposed which
assess both the accuracy of modeling internal spectral
representations with measures of frequency selectivity, and the
value of simulating the effects of hearing impairment with
background noise.
StatusFinished
Effective start/end date4/1/896/30/16

Funding

  • National Institutes of Health: $240,975.00
  • National Institutes of Health
  • National Institutes of Health: $195,940.00
  • National Institutes of Health
  • National Institutes of Health: $37,319.00
  • National Institutes of Health
  • National Institutes of Health: $187,756.00
  • National Institutes of Health: $128,640.00
  • National Institutes of Health: $142,068.00
  • National Institutes of Health: $41,517.00
  • National Institutes of Health
  • National Institutes of Health: $95,357.00
  • National Institutes of Health
  • National Institutes of Health: $238,566.00
  • National Institutes of Health: $190,257.00
  • National Institutes of Health: $203,075.00
  • National Institutes of Health: $44,527.00
  • National Institutes of Health
  • National Institutes of Health: $90,189.00
  • National Institutes of Health: $107,755.00
  • National Institutes of Health: $187,756.00
  • National Institutes of Health: $157,110.00
  • National Institutes of Health: $230,932.00
  • National Institutes of Health: $79,220.00
  • National Institutes of Health: $152,533.00
  • National Institutes of Health: $282,250.00
  • National Institutes of Health: $161,823.00

ASJC

  • Medicine(all)
  • Neuroscience(all)

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