Speech‐reception threshold for sentences as a function of age and noise level
作者:
R. Plomp,
A. M. Mimpen,
期刊:
The Journal of the Acoustical Society of America
(AIP Available online 1979)
卷期:
Volume 66,
issue 5
页码: 1333-1342
ISSN:0001-4966
年代: 1979
DOI:10.1121/1.383554
出版商: Acoustical Society of America
数据来源: AIP
摘要:
For 140 male subjects (20 per decade between the ages 20 and 89) and 72 female subjects (20 per decade between 60 and 89, and 12 for the age interval 90–96), the monaural speech‐reception threshold (SRT) for sentences was investigated in quiet and at four noise levels (22.5, 37.5, 52.5, and 67.5 dBAnoise with long‐term average speech spectra). The median SRT as well as the quartiles are given as a function of age. The data are described in terms of a model published earlier [ J. Acoust. Soc. Am. 63, 533–549 (1978)]. According to this model every hearing loss for speech (SHL) is interpreted as the sum of a loss classA(attenuation), characterized by a reduction of the levels of both speech signal and noise, and a loss classD(distortion), comparable with a decrease in signal‐to‐noise ratio. Both SHLA+D(hearing loss in quiet) and SHLD(hearing loss at high noise levels) increase progressively above the age of 50 (reaching typical values of 30 and 6 dB, respectively, at age 85). The spread of SHLDas a function of SHLA+Dfor the individual ears is so large (σ=2.7 dB) that subjects with the same hearing loss for speech in quiet may differ considerably in their ability to understand speech in noise. The data confirm that the hearing handicap of many elderly subjects manifests itself primarily in a noisy environment. Acceptable noise levels in rooms used by the aged must be 5 to 10 dB lower than those for normal‐hearing subjects.
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