Mahanta, T K and B, Venkatesham
(2017)
Evaluation of disc and shell horns sound quality characteristics.
The Journal of Acoustical Society of India, 44 (2).
pp. 112-124.
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Abstract
The present paper discusses a methodology, for studying characteristics influencing an automotive
horn's sound quality, based on objective analysis and subjective (jury) tests.For this, twenty two
horn sound samples are considered. Psychoacoustics parameters (such as loudness, sharpness,
roughness, fluctuation strength and tonality) and index of relative sensory pleasantness are
calculated for recorded sound samples in objective analysis. Two types of subjective tests which
are relevant test (RT) and Semantic differential test (SDT) are developed. These tests are conducted
with participation of thirty subjects, aged between 20-40 years with normal hearing. A selection
chart is proposed based on subjective test data to select an appropriate horn which has relevance
and pleasantness. A correlation study based on principal component analysis is done between
objective analysis data and subjective test data. A transformation matrix is calculated from subject
ratings and objective metrics profile. The expected performance in subject rating is predicted using
transformation matrix and psychoacoustic parameters.
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