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A study of the subjective equivalence of noise and whole-body vibration

A study of the subjective equivalence of noise and whole-body vibration
A study of the subjective equivalence of noise and whole-body vibration

An experiment has been conducted to determine the subjective equivalence of 1000 Hz pure tone noise and 10 Hz sinusoidal whole-body vertical vibration. Each of 20 male subjects was exposed to all 64 possible combinations of 8 levels of noise (65 dB to 100 dB SPL) and 8 levels of vibration (0·20 m/s2 r.m.s. to 1·2 m/s2 r.m.s.). The noise was presented via circumaural headphones and the vibration exposure was by means of a flat hard seat. The method of constant stimuli was used. Both stimuli were presented simultaneously for a period of ten seconds and subjects were asked to indicate whether, if they were to be presented with the combination again, they would prefer that the noise or the vibration should be reduced. It was concluded that the subjects were relatively self-consistent and that the major source of variability was due to intersubject differences. The conditions for equivalence for 50% of the subjects ranged from about 0·2 m/s2 r.m.s. at 69 dB to 1·2 m/s2 r.m.s. at 94 dB. The results are presented in a form that enables an estimate to be made of the percentage of subjects who prefer reduced noise or vibration at any of the given combinations of the two stimuli. Further studies to extend the range and establish the general applicability of these results are suggested. It is considered that such results could be employed as a guide to reducing either the noise or the vibration in some environments.

0022-460X
453-461
Fleming, D. B.
b891fe38-d31c-4549-9909-964640f45b0c
Griffin, M. J.
24112494-9774-40cb-91b7-5b4afe3c41b8
Fleming, D. B.
b891fe38-d31c-4549-9909-964640f45b0c
Griffin, M. J.
24112494-9774-40cb-91b7-5b4afe3c41b8

Fleming, D. B. and Griffin, M. J. (1975) A study of the subjective equivalence of noise and whole-body vibration. Journal of Sound and Vibration, 42 (4), 453-461. (doi:10.1016/0022-460X(75)90276-X).

Record type: Article

Abstract

An experiment has been conducted to determine the subjective equivalence of 1000 Hz pure tone noise and 10 Hz sinusoidal whole-body vertical vibration. Each of 20 male subjects was exposed to all 64 possible combinations of 8 levels of noise (65 dB to 100 dB SPL) and 8 levels of vibration (0·20 m/s2 r.m.s. to 1·2 m/s2 r.m.s.). The noise was presented via circumaural headphones and the vibration exposure was by means of a flat hard seat. The method of constant stimuli was used. Both stimuli were presented simultaneously for a period of ten seconds and subjects were asked to indicate whether, if they were to be presented with the combination again, they would prefer that the noise or the vibration should be reduced. It was concluded that the subjects were relatively self-consistent and that the major source of variability was due to intersubject differences. The conditions for equivalence for 50% of the subjects ranged from about 0·2 m/s2 r.m.s. at 69 dB to 1·2 m/s2 r.m.s. at 94 dB. The results are presented in a form that enables an estimate to be made of the percentage of subjects who prefer reduced noise or vibration at any of the given combinations of the two stimuli. Further studies to extend the range and establish the general applicability of these results are suggested. It is considered that such results could be employed as a guide to reducing either the noise or the vibration in some environments.

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More information

Published date: 22 October 1975

Identifiers

Local EPrints ID: 429265
URI: http://eprints.soton.ac.uk/id/eprint/429265
ISSN: 0022-460X
PURE UUID: 4807089e-bac1-4ded-8780-918da34c9f22
ORCID for M. J. Griffin: ORCID iD orcid.org/0000-0003-0743-9502

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Date deposited: 25 Mar 2019 17:30
Last modified: 07 Oct 2020 02:49

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