Speech Recognition in the Sound Field: Directed Audio vs. Conventional Speakers.

Autor: Mehta, Ritvik P., Mattson, Sara L., Seitzman, Robin L., Kappus, Brian
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Zdroj: AudiologyOnline; Aug2015, p1-1, 1p
Abstrakt: Objective: To assess whether the HyperSound® Audio System (HSS), a novel audio system using ultrasound technology, improves speech understanding compared to a conventional acoustic speaker in participants with mild to severe hearing loss. Study Design: Single-blinded, randomized crossover study. Setting: Tertiary referral center. Patients: Ten adult patients with mild to severe hearing loss with pure-tone average (PTA) of > 30 dB and word recognition scores of < 80% in both ears. Intervention(s): Subjects completed the AzBio Sentences test and the Consonant-Nucleus-Consonant (CNC) word test for each speaker type. Subjects were randomized regarding through which speaker the tests were administered first. All tests were completed for the first speaker before switching to the second speaker. The AzBio and CNC word tests were conducted in quiet at 50 dB and 70 dB SPL. The AzBio was also conducted in noise at +10 SNR. Main Outcome Measure: Speech recognition, as measured by the AzBio Sentences test and the CNC word test in the sound field. Results: Significant gains in speech recognition were associated with the HSS versus conventional speaker for all test conditions at 70 dB SPL. Median AZBio scores increased from 0.0% to 34.9% (p=0.008) in quiet, and from 1.8% to 51.6% in noise (p=0.008). Median CNC whole word test scores increased from 0.0% to 54.0% (p=0.004) and median phoneme test scores from 4.0% to 63.4% (p=0.004). Conclusions: HSS demonstrates highly significant improvement in unaided speech recognition over conventional speakers at 70 dB SPL, including in background noise, in those with mild to severe hearing loss. [ABSTRACT FROM AUTHOR]
Databáze: Complementary Index
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