With the widespread success of universal newborn hearing screening (UNHS) programs, it is now possible to identify hearing loss at birth and initiate amplification in early infancy. The ability to identify hearing loss at birth, however, has made the gaps in our knowledge more obvious. The overall goal of the proposed studies is to gain a better understanding of the challenges faced and the unique needs of young children with sensorineural hearing loss.
Aim 1 will assess the relative benefit of an extended bandwidth hearing-aid vs. a frequency-lowering scheme to improve the audibility of high-frequency speech components for children with hearing loss. It is hypothesized that the benefit derived from these two approaches will vary as a function of degree and configuration of hearing loss. Results will provide new information regarding optimum amplification strategies for individuals with varying degrees and configurations of hearing loss.
Aim 2 will examine the ability of children with and without hearing loss to perceive speech in adverse listening environments. It is hypothesized that performance will be poorer for the hearing-impaired group and that fast-acting compression will degrade performance relative to slow- acting compression. Results will provide a better understanding of children's ability to perform complex listening tasks in noise and how amplification strategies support or fail to support their perceptual strategies.
Aim 3 will examine the relative contribution of acoustic-phonetic, phonotactic and language- based cues to speech perception for normal-hearing and hearing-impaired children. It is hypothesized that the patterns of reliance on language-based cues (e.g., filling in unheard acoustic-phonetic details by relying on the language context) will differ between the normal-hearing and hearing-impaired children and that developmental changes in the use of these cues will occur more rapidly in the normal-hearing group. Results will increase our understanding of individual differences in the use of perceptual strategies, the extent to which these two groups rely on language-based processes in difficult listening situations, and how these divergent strategies influence speech perception.
The overall goal of the proposed studies is to gain a better understanding of the challenges faced by young children with hearing loss and to determine how well current hearing aids support their listening needs. Results will provide new information regarding optimum hearing-aid strategies for individuals and may lead to improvements in hearing-aid signal processing and the identification of areas where auditory training may be needed.
|Lewis, Dawna; Kopun, Judy; McCreery, Ryan et al. (2017) Effect of Context and Hearing Loss on Time-Gated Word Recognition in Children. Ear Hear 38:e180-e192|
|Brennan, Marc A; Lewis, Dawna; McCreery, Ryan et al. (2017) Listening Effort and Speech Recognition with Frequency Compression Amplification for Children and Adults with Hearing Loss. J Am Acad Audiol 28:823-837|
|Brennan, Marc; McCreery, Ryan; Kopun, Judy et al. (2016) Masking Release in Children and Adults With Hearing Loss When Using Amplification. J Speech Lang Hear Res 59:110-21|
|Kimlinger, Chelsea; McCreery, Ryan; Lewis, Dawna (2015) High-frequency audibility: the effects of audiometric configuration, stimulus type, and device. J Am Acad Audiol 26:128-37|
|Brennan, Marc A; McCreery, Ryan; Kopun, Judy et al. (2014) Paired comparisons of nonlinear frequency compression, extended bandwidth, and restricted bandwidth hearing aid processing for children and adults with hearing loss. J Am Acad Audiol 25:983-98|
|Alexander, Joshua M; Kopun, Judy G; Stelmachowicz, Patricia G (2014) Effects of frequency compression and frequency transposition on fricative and affricate perception in listeners with normal hearing and mild to moderate hearing loss. Ear Hear 35:519-32|
|Gustafson, Samantha; McCreery, Ryan; Hoover, Brenda et al. (2014) Listening effort and perceived clarity for normal-hearing children with the use of digital noise reduction. Ear Hear 35:183-94|
|McCreery, Ryan W; Alexander, Joshua; Brennan, Marc A et al. (2014) The influence of audibility on speech recognition with nonlinear frequency compression for children and adults with hearing loss. Ear Hear 35:440-7|
|McCreery, Ryan W; Brennan, Marc A; Hoover, Brenda et al. (2013) Maximizing audibility and speech recognition with nonlinear frequency compression by estimating audible bandwidth. Ear Hear 34:e24-7|
|McCreery, Ryan W; Stelmachowicz, Patricia G (2013) The effects of limited bandwidth and noise on verbal processing time and word recall in normal-hearing children. Ear Hear 34:585-91|
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