Effect of horizontal sound-absorptive strips inside closed rooms

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 hor...

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Bibliographic Details
Published inAcoustical Science and Technology Vol. 41; no. 5; pp. 709 - 719
Main Authors Asakura, Takumi, Yashima, Wataru, Satoh, Fumiaki
Format Journal Article
LanguageEnglish
Published Tokyo ACOUSTICAL SOCIETY OF JAPAN 01.09.2020
Japan Science and Technology Agency
Subjects
Absorption
Absorptivity
Computer simulation
Evaluation
Finite difference time domain method
Room-acoustic indices
Scheffe's paired comparison method
Sound
Sound transmission
Sound-absorptive strip
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Summary: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.
ISSN:1346-3969
1347-5177
DOI:10.1250/ast.41.709