title: Relationship between listening difficulty and acoustical objective measures in reverberant sound fields.
abstract: The previous work [Morimoto et al., J. Acoust. Soc. Am. 116, 1607-1613] showed that listening difficulty ratings can be used to evaluate speech transmission performance more exactly and sensitively than intelligibility. Meanwhile, speech transmission performance is usually evaluated using acoustical objective measures, which are directly associated with physical parameters of room acoustic design. However, the relationship between listening difficulty ratings and acoustical objective measures was not minutely investigated. In the present study, a total of 96 impulse responses were used to investigate the relationship between listening difficulty ratings and several objective measures in unidirectional sound fields. The result of the listening test showed that (1) the correlation between listening difficulty ratings and speech transmission index (STI) is the strongest of all tested objective measures, and (2) A-weighted D(50), C(50), and center time, which are obtained from the impulse responses passed through an A-weighted filter, also strongly correlate with listening difficulty ratings, and their correlations with listening difficulty ratings are not statistically different from the correlation between listening difficulty ratings and STI.
authors.affiliation: Environmental Acoustics Laboratory, Graduate School of Engineering, Kobe University, Rokko, Nada, Kobe 657-8501, Japan. hayato@kobe-u.ac.jp
authors.forename: Hayato
authors.initials: H
authors.lastname: Sato
authors.forename: Masayuki
authors.initials: M
authors.lastname: Morimoto
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Sato
authors.forename: Megumi
authors.initials: M
authors.lastname: Wada
mesh_terms: D000328:Adult; D044466:Asian People; D005260:Female; D006801:Humans; D007802:Language; D008297:Male; D009622:Noise / Q000009:adverse effects*; D013016:Sound; D013061:Speech Acoustics; D013067:Speech Perception; D014825:Vocabulary