Development of the speech test signal in Brazilian Portuguese for real-ear measurement

Development of the speech test signal in Brazilian Portuguese for real-ear measurement

Author Garolla, Luciana P. Autor UNIFESP Google Scholar
Scollie, Susan D. Google Scholar
Iorio, Maria Cecilia Martinelli Autor UNIFESP Google Scholar
Institution Universidade Federal de São Paulo (UNIFESP)
Univ Western Ontario
Abstract Objective: Recommended practice is to verify the gain and/or output of hearing aids with speech or speech-shaped signals. This study has the purpose of developing a speech test signal in Brazilian Portuguese that is electroacoustically similar to the international long-term average speech spectrum (ILTASS) for use in real ear verification systems. Design: A Brazilian Portuguese speech passage was recorded using standardized equipment and procedures for one female talker and compared to ISTS. the passage consisted of simple, declarative sentences making a total of 148 words. Study sample: the recordings of a Brazilian Portuguese passage were filtered to the ILTASS and compared to the International Speech Test Signal (ISTS). Aided recordings were made at three test levels, for three audiograms for the Brazilian Portuguese passage and the ISTS. Results: the unaided test signals were spectrally matched to within 0.5 dB. Aided evaluation revealed that the Brazilian Portuguese passage produced aided spectra that were within 1 dB on average, within about 2 dB per audiogram, and within about 3 dB per frequency for 95% of fittings. Conclusion: Results indicate that the Brazilian Portuguese passage developed in this study provides similar electroacoustic hearing-aid evaluations to those expected from the standard ISTS passage.
Keywords Test signal
hearing-aid measurement
hearing aid
speech acoustics
Brazilian Portuguese
Language English
Sponsor Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
Ministry of Education, Brazil
Grant number CAPES: 2330-11-03
Date 2013-08-01
Published in International Journal of Audiology. London: Informa Healthcare, v. 52, n. 8, p. 572-576, 2013.
ISSN 1499-2027 (Sherpa/Romeo, impact factor)
Publisher Informa Healthcare
Extent 572-576
Access rights Closed access
Type Article
Web of Science ID WOS:000321693900008

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