Acoustical Science and Technology
Online ISSN : 1347-5177
Print ISSN : 1346-3969
ISSN-L : 0369-4232
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Effect of horizontal sound-absorptive strips inside closed rooms
Takumi AsakuraWataru YashimaFumiaki Satoh
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2020 Volume 41 Issue 5 Pages 709-719

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Abstract

The sound absorption characteristics obtained with horizontally arranged sound-absorptive strips on walls were evaluated by objective measure based on the acoustical indices determined from the impulse responses calculated by finite-difference time-domain simulation. The subjective effect of the horizontal sound-absorptive strips (HSSs) was also investigated by subjective measure based on Scheffe's paired comparison method. The results of the numerical case study confirmed that the frequency characteristics of the acoustic indices of rooms with the HSSs significantly changed under the influence of the relative positional relationship between the source and receiving points and the arrangement height of the strips. Through a subjective evaluation experiment, the differences in the absorption effect of various types of settings of the strips on the reverberation inside rooms were also clarified.

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© 2020 by The Acoustical Society of Japan
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