Psychological experiments on listener envelopment when both the early-to-late sound level and directional late energy ratios are varied, and consideration of calculated LEV in actual halls

Hiroshi Furuya, Kazutoshi Fujimoto, Akiko Wakuda

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

The purposes of this paper are to clarify the relation between listener envelopment (LEV) and two physical factors, namely, early-to-late sound level C80 and directional late energy ratios (DLRs), and to demonstrate the significance of evaluating LEV using C80 and DLRs. Firstly, two psychological experiments are performed. In the first experiment, the results show that the previous findings about the effects of late reflections from lateral, overhead, and behind the listener on LEV are valid when they also consist of plural directional energy components, as are found in real sound fields. In the second experiment, the relational equation among LEV, C80, and DLRs is derived from results when the physical factors are simultaneously varied. Secondly, psychological scores for LEV are calculated in actual halls by applying measured values for C80 and DLRs to the equation. The results show that the differences in LEV among different seating positions and in the spatial uniformity of LEV among different halls are expected to be significantly large depending on the values of C80 and DLRs. This suggests the significance of evaluating LEV by means of C80 and DLRs.

Original languageEnglish
Pages (from-to)1085-1095
Number of pages11
JournalApplied Acoustics
Volume69
Issue number11
DOIs
Publication statusPublished - 2008 Nov
Externally publishedYes

Fingerprint

Acoustic waves
acoustics
physical factors
Experiments
Acoustic fields
energy
sound fields

Keywords

  • Directional late energy ratio
  • Early-to-late sound level
  • Hall measurement
  • Listener envelopment
  • Psychological experiment

ASJC Scopus subject areas

  • Mechanical Engineering
  • Acoustics and Ultrasonics

Cite this

@article{9128b27e841143788275743a86381c17,
title = "Psychological experiments on listener envelopment when both the early-to-late sound level and directional late energy ratios are varied, and consideration of calculated LEV in actual halls",
abstract = "The purposes of this paper are to clarify the relation between listener envelopment (LEV) and two physical factors, namely, early-to-late sound level C80 and directional late energy ratios (DLRs), and to demonstrate the significance of evaluating LEV using C80 and DLRs. Firstly, two psychological experiments are performed. In the first experiment, the results show that the previous findings about the effects of late reflections from lateral, overhead, and behind the listener on LEV are valid when they also consist of plural directional energy components, as are found in real sound fields. In the second experiment, the relational equation among LEV, C80, and DLRs is derived from results when the physical factors are simultaneously varied. Secondly, psychological scores for LEV are calculated in actual halls by applying measured values for C80 and DLRs to the equation. The results show that the differences in LEV among different seating positions and in the spatial uniformity of LEV among different halls are expected to be significantly large depending on the values of C80 and DLRs. This suggests the significance of evaluating LEV by means of C80 and DLRs.",
keywords = "Directional late energy ratio, Early-to-late sound level, Hall measurement, Listener envelopment, Psychological experiment",
author = "Hiroshi Furuya and Kazutoshi Fujimoto and Akiko Wakuda",
year = "2008",
month = "11",
doi = "10.1016/j.apacoust.2007.06.006",
language = "English",
volume = "69",
pages = "1085--1095",
journal = "Applied Acoustics",
issn = "0003-682X",
publisher = "Elsevier Limited",
number = "11",

}

TY - JOUR

T1 - Psychological experiments on listener envelopment when both the early-to-late sound level and directional late energy ratios are varied, and consideration of calculated LEV in actual halls

AU - Furuya, Hiroshi

AU - Fujimoto, Kazutoshi

AU - Wakuda, Akiko

PY - 2008/11

Y1 - 2008/11

N2 - The purposes of this paper are to clarify the relation between listener envelopment (LEV) and two physical factors, namely, early-to-late sound level C80 and directional late energy ratios (DLRs), and to demonstrate the significance of evaluating LEV using C80 and DLRs. Firstly, two psychological experiments are performed. In the first experiment, the results show that the previous findings about the effects of late reflections from lateral, overhead, and behind the listener on LEV are valid when they also consist of plural directional energy components, as are found in real sound fields. In the second experiment, the relational equation among LEV, C80, and DLRs is derived from results when the physical factors are simultaneously varied. Secondly, psychological scores for LEV are calculated in actual halls by applying measured values for C80 and DLRs to the equation. The results show that the differences in LEV among different seating positions and in the spatial uniformity of LEV among different halls are expected to be significantly large depending on the values of C80 and DLRs. This suggests the significance of evaluating LEV by means of C80 and DLRs.

AB - The purposes of this paper are to clarify the relation between listener envelopment (LEV) and two physical factors, namely, early-to-late sound level C80 and directional late energy ratios (DLRs), and to demonstrate the significance of evaluating LEV using C80 and DLRs. Firstly, two psychological experiments are performed. In the first experiment, the results show that the previous findings about the effects of late reflections from lateral, overhead, and behind the listener on LEV are valid when they also consist of plural directional energy components, as are found in real sound fields. In the second experiment, the relational equation among LEV, C80, and DLRs is derived from results when the physical factors are simultaneously varied. Secondly, psychological scores for LEV are calculated in actual halls by applying measured values for C80 and DLRs to the equation. The results show that the differences in LEV among different seating positions and in the spatial uniformity of LEV among different halls are expected to be significantly large depending on the values of C80 and DLRs. This suggests the significance of evaluating LEV by means of C80 and DLRs.

KW - Directional late energy ratio

KW - Early-to-late sound level

KW - Hall measurement

KW - Listener envelopment

KW - Psychological experiment

UR - http://www.scopus.com/inward/record.url?scp=50149102007&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=50149102007&partnerID=8YFLogxK

U2 - 10.1016/j.apacoust.2007.06.006

DO - 10.1016/j.apacoust.2007.06.006

M3 - Article

AN - SCOPUS:50149102007

VL - 69

SP - 1085

EP - 1095

JO - Applied Acoustics

JF - Applied Acoustics

SN - 0003-682X

IS - 11

ER -