Playback level calibration by hand rubbing for remote listening test

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Playback level calibration is an important procedure in listening tests. However, this is a challenging task in remote listening tests, which have become more popular nowadays. A convenient method, which has been used in an online hearing test, is to adjust the playback level so that the perceived loudness of a hand rubbing recording matches the subject's own hand rubbing. However, the reliability of this method has not been formally investigated. This paper firstly proposes a procedure for creating a reference hand rubbing recording and calibrating the stimulus level by the experimenter and the subject. The paper then describes an experiment that was conducted to investigate the inter-subject consistency of the sound pressure levels (SPLs) of hand rubbing made by fifteen subjects. It was found that the mean SPLs (LAeq) and 95% confidence intervals for three rubbing intensities Hard, Medium and Soft were 54.5 dB (±2.4 dB), 46.8 dB (±2.8 dB), and 39.8 dB (±3.2 dB), respectively. This seems to imply that the inter-subject variability of hand rubbing SPLs would be small enough to allow for reasonably consistent playback level settings across different people in a remote listening test environment.

Original languageEnglish
Title of host publicationProceedings of the 24th International Congress on Acoustics
Subtitle of host publicationICA 2022 Proceedings
PublisherICA International Commission for Acoustics
Number of pages4
Publication statusPublished - 24 Oct 2022
Event24th International Congress on Acoustics - Gyeongju, Korea, Republic of
Duration: 24 Oct 202228 Oct 2022
Conference number: 24

Publication series

NameProceedings of the International Congress on Acoustics
PublisherICA International Commission for Acoustics
ISSN (Print)2226-7808


Conference24th International Congress on Acoustics
Abbreviated titleICA 2022
Country/TerritoryKorea, Republic of
Internet address

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