Effect of horizontal sound-absorptive strips inside closed rooms

Takumi Asakura, Wataru Yashima, Fumiaki Satoh

Research output: Contribution to journalArticlepeer-review

Abstract

The sound absorption characteristics obtained with horizontally arranged soundabsorptive 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.

Original languageEnglish
Pages (from-to)709-719
Number of pages11
JournalAcoustical Science and Technology
Volume41
Issue number5
DOIs
Publication statusPublished - 1 Sep 2020

Keywords

  • Finite-difference time-domain method
  • Room-acoustic indices
  • Scheffe's paired comparison method
  • Sound-absorptive strip

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