The long-term aim of this project is a better understanding of mechanisms that underlie the ability to detect and recognize signals in complex spectro-temporal auditory backgrounds in normal and impaired hearing. The proposed work encompasses three specific aims investigating spectro-temporal processing in normal and impaired ears. The first specific aim is to obtain a better understanding of the effect of hearing loss on spectro-temporal processes that underlie our ability to """"""""piece together"""""""" fragments of acoustical signals that are available when the S/N ratio is very poor. Here, we will explore the effects of sensori-neural hearing loss on 1) the ability to combine asynchronous spectro-temporal information in the perception of speech and pitch; 2) the ability to combine synchronous spectro-temporal information in the perception of across frequency speech cues; and 3) the facilitative effect of background noise when integrating fragments of spectro-temporal information (the induction effect). The second and third aims continue our established research program investigating the importance of across-frequency comodulation in normal spectro-temporal analysis.
The second aim i s to test between across-channel versus within channel accounts of comodulation masking release (CMR).
The third aim i s to test between across-channel versus within channel accounts of comodulation detection differences (CDD). Whereas the original interpretations of both CMR and CDD were based upon the analysis of across-channel information, recent research has challenged such interpretations, and has suggested that the phenomena may be accounted for by appealing only to peripheral, single-channel mechanisms. Psychoacoustical approaches involving temporal fringe manipulations, dichotic stimulus presentation, and informational masking are developed to test between these possible explanations. ? ?
| Ozmeral, Erol J; Buss, Emily; Hall 3rd, Joseph W (2016) The Effects of Sensorineural Hearing Impairment on Asynchronous Glimpsing of Speech. PLoS One 11:e0154920 |
| Hall 3rd, Joseph W; Buss, Emily; Ozmeral, Erol J et al. (2016) The effect of noise fluctuation and spectral bandwidth on gap detection. J Acoust Soc Am 139:1601 |
| Buss, Emily; Dai, Huanping; Hall 3rd, Joseph W (2015) Effect of stimulus bandwidth and duration on monaural envelope correlation perception. J Acoust Soc Am 137:EL51-7 |
| Buss, Emily; Hall 3rd, Joseph W; Grose, John H (2013) Monaural envelope correlation perception for bands narrower or wider than a critical band. J Acoust Soc Am 133:405-16 |
| Hall 3rd, Joseph W; Buss, Emily; Grose, John H (2013) Wideband monaural envelope correlation perception. Adv Exp Med Biol 787:383-90 |
| Ozmeral, Erol J; Buss, Emily; Hall, Joseph W (2012) Asynchronous glimpsing of speech: spread of masking and task set-size. J Acoust Soc Am 132:1152-64 |
| Buss, Emily; Grose, John H; Hall, Joseph W (2012) Frequency discrimination under conditions of comodulation masking release (L). J Acoust Soc Am 131:2557-60 |
| Buss, Emily; Whittle, Lisa N; Grose, John H et al. (2009) Masking release for words in amplitude-modulated noise as a function of modulation rate and task. J Acoust Soc Am 126:269-80 |
| Blanks, Deidra A; Buss, Emily; Grose, John H et al. (2008) Interaural time discrimination of envelopes carried on high-frequency tones as a function of level and interaural carrier mismatch. Ear Hear 29:674-83 |
| Hall 3rd, Joseph W; Buss, Emily; Grose, John H (2008) Comodulation detection differences in children and adults. J Acoust Soc Am 123:2213-9 |
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