Speech Identification with Temporal and Spectral Modification in Subjects with Auditory Neuropathy. (9th September 2012)

• Record Type: Journal Article
• Authors: Kumar Name, Vijaya; Vanaja, C. S.
• Other Names: Alpini D. C. Academic Editor.; Beutner D. Academic Editor.; Robb M. P. Academic Editor.
• Is Part Of: ISRN otolaryngology. Volume 2012(2012)
• Publication Date: 2012-09-09
• Subjects: Otolaryngology -- Periodicals; Otorhinolaryngologic Diseases; Otolaryngology; Periodical; Periodicals; Fulltext; Internet Resources; Periodicals; Electronic journals; 617.51
• DOI: 10.5402/2012/671247
• Languages: English
• ISSNs: 2090-5742

Abstract

Abstract : Background . The aim of this study was to investigate the individual effects of envelope enhancement and high-pass filtering (500 Hz) on word identification scores in quiet for individuals with Auditory Neuropathy. Method . Twelve individuals with Auditory Neuropathy (six males and six females) with ages ranging from 12 to 40 years participated in the study. Word identification was assessed using bi-syllabic words in each of three speech processing conditions: unprocessed, envelope-enhanced, and high-pass filtered. All signal processing was carried out using MATLAB-7. Results . Word identification scores showed a mean improvement of 18% with envelope enhanced versus unprocessed speech. No significant improvement was observed with high-pass filtered versus unprocessed speech. Conclusion . These results suggest that the compression/expansion signal processing strategy enhances speech identification scores—at least for mild and moderately impaired individuals with AN. In contrast, simple high-pass filtering (i.e., eliminating the low-frequency content of the signal) does not improve speech perception in quiet for individuals with Auditory Neuropathy.