Perceptual detection thresholds for numerical dispersion in binaural auralizations of two acoustically different rooms
Artikel i vetenskaplig tidskrift, 2022

Room acoustic simulations using the finite-difference time-domain method on a wide frequency range can be computationally expensive and typically contain numerical dispersion. Numerical dispersion can be audible and, thus, constitutes an artifact in auralizations. There is a need to measure perceptual thresholds for numerical dispersion to achieve an optimal balance between computational complexity and audibility of dispersion. This work measures the perceptual detection thresholds for numerical dispersion in binaural auralizations of two acoustically different rooms. Numerical dispersion is incorporated into measured binaural room impulse responses (BRIRs) by the means of filters that represent the dispersion that plane waves experience, which propagate in the simulation in the direction of the worst-case dispersion error. The results show that the perceptual detection threshold is generally lower for the most reverberant room and greatly depends on the source signal independently of the room in which the threshold is measured. It is the most noticeable in the pure BRIRs, i.e., with an impulse as source signal, and almost unnoticeable with speech. The results also show that there was no statistical evidence that the perceptual thresholds for the conditions where numerical dispersion was present or absent in the direct path of the BRIRs be different.

TIME-DOMAIN SIMULATION

AUDIBILITY

ERROR

Författare

Julie Meyer

Aalto-Yliopisto

Jens Ahrens

Chalmers, Arkitektur och samhällsbyggnadsteknik, Teknisk akustik

Tapio Lokki

Aalto-Yliopisto

Journal of the Acoustical Society of America

0001-4966 (ISSN) 1520-8524 (eISSN)

Vol. 152 4 2266-2276

Binaural reproduktion av inspelningar med sfäriska mikrofonsystem

Oculus Inc., 2018-05-01 -- 2019-04-30.

Styrkeområden

Informations- och kommunikationsteknik

Ämneskategorier

Övrig annan medicin och hälsovetenskap

Jämförande språkvetenskap och allmän lingvistik

Musikvetenskap

DOI

10.1121/10.0014830

PubMed

36319249

Mer information

Senast uppdaterat

2023-10-26