Audibility of dispersion error in room acoustic finite-difference time-domain simulation in the presence of absorption of air | Zendy

Jukka Saarelma | Zendy; Lauri Savioja | Zendy

Open Access

Audibility of dispersion error in room acoustic finite-difference time-domain simulation in the presence of absorption of air

Author(s) -

Jukka Saarelma,

Lauri Savioja

Publication year - 2016

Publication title -

the journal of the acoustical society of america

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.619

H-Index - 187

eISSN - 1520-8524

pISSN - 0001-4966

DOI - 10.1121/1.4972529

Subject(s) - dispersion (optics) , acoustics , absorption (acoustics) , acoustic dispersion , materials science , phase (matter) , time domain , finite difference scheme , frequency domain , optics , physics , mechanics , mathematics , computer science , mathematical analysis , quantum mechanics , computer vision

The finite-difference time-domain method has gained increasing interest for room acoustic prediction use. A well-known limitation of the method is a frequency and direction dependent dispersion error. In this study, the audibility of dispersion error in the presence of air absorption is measured. The results indicate that the dispersion error in the worst-case direction of the studied scheme gets masked by the air absorption at a phase velocity error percentage of 0.28% at the frequency of 20 kHz.

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