The study of mechanisms used for speech perception will be continued using a number of auditory phenomena and procedures developed in the principal investigator's laboratory (which include verbal transformations, phonemic restorations, spectral restoration, vowel conversions, and phonemic splitting).
The aim i s to examine linguistic mechanisms not readily accessible through other means. It is anticipated that the information obtained will be of help in elucidating mechanisms associated with the coding, processing, storage and retrieval of information necessary for the comprehension of speech, and should aid in understanding the etiology of dysphasias and aphasias, as well as enhancing the diagnoses and treatment of these disorders. In order to design multichannel cochlear implants that can restore hearing in deaf individuals and permit them to comprehend speech, it is necessary to have accurate data describing the information content of different spectral regions, and how they interact when combined. The principal investigator's laboratory has developed a procedure capable of obtaining such data directly, which if this application is funded, will be gathered and used to evaluate, and provide an alternative to the estimates derived from the indirect procedures in current use.
|Warren, Richard M; Bashford Jr, James A; Lenz, Peter W (2017) Critical bandwidth speech: Arrays of subcritical band speech maintain near-ceiling intelligibility at high amplitudes. J Acoust Soc Am 141:EL222|
|Bashford Jr, James A; Warren, Richard M; Lenz, Peter W (2017) Maintaining intelligibility at high intensities with arrays of subcritical width speech bands and interpolated noise. J Acoust Soc Am 142:EL299|
|Bashford Jr, James A; Warren, Richard M; Lenz, Peter W (2015) How broadband speech may avoid neural firing rate saturation at high intensities and maintain intelligibility. J Acoust Soc Am 137:EL340-6|
|Bashford Jr, James A; Warren, Richard M; Lenz, Peter W (2013) Maintaining intelligibility at high speech intensities: evidence of lateral inhibition in the lower auditory pathway. J Acoust Soc Am 134:EL119-25|
|Warren, R M; Bashford, J A; Lenz, P W (2013) How Broadband Speech May Avoid Neural Firing Rate Saturation at High Intensities and Maintain Intelligibility. Proc Meet Acoust 13:3426|
|Warren, Richard M; Bashford Jr, James A; Lenz, Peter W (2013) When intelligibilities of paired speech bands do not behave the way they are supposed to. J Acoust Soc Am 134:EL244-50|
|Bashford, J A; Warren, R M; Lenz, P W (2013) When Spectral Smearing Can Increase Speech Intelligibility. Proc Meet Acoust 19:60118-60124|
|Bashford Jr, James A; Warren, Richard M; Lenz, Peter W (2011) Enhancing the intelligibility of high intensity speech: Evidence of inhibition in the lower auditory pathway. Proc Meet Acoust 12:|
|Warren, Richard M; Bashford, James A; Lenz, Peter W (2011) An alternative to the computational Speech Intelligibility Index estimates: direct measurement of rectangular passband intelligibilities. J Exp Psychol Hum Percept Perform 37:296-302|
|Bashford, James A; Warren, Richard M; Lenz, Peter W (2010) When noise vocoding can improve the intelligibility of sub-critical band speech. Proc Meet Acoust 9:60001-600019|
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