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Evaluation of Remote Categorical Loudness Scaling
Judy G Kopun1, McKenna Turner1,2, Sara E Harris1
1Center for Hearing Research, Boys Town National Research Hospital, Omaha, NE.
American Journal of Audiology
|December 10, 2021
Summary
Remote categorical loudness scaling (CLS) is feasible, with controlled stimulus and noise levels. However, across-run bias was larger remotely than in the lab, suggesting further reliability improvements are needed.
Area of Science:
- Audiology
- Psychoacoustics
- Hearing Science
Background:
- Categorical loudness scaling (CLS) is a psychoacoustic method to quantify loudness perception.
- Traditional CLS testing requires controlled laboratory environments.
- Remote testing offers potential for increased accessibility and participant convenience.
Purpose of the Study:
- To determine the feasibility of administering CLS tests remotely.
- To compare the reliability of remote CLS results with traditional laboratory-based CLS.
- To gather preliminary evidence on the validity of remote CLS testing.
Main Methods:
- CLS data were collected from 21 adults in a home setting and compared to previous laboratory data.
- Participants received precalibrated equipment and performed headphone output and ambient noise level checks.
- CLS measurements were taken at 1 and 4 kHz across two runs.
Main Results:
- Remote testing achieved precise stimulus levels (within 1.5 dB) and controlled ambient noise.
- Within-run variability was comparable between remote and laboratory settings.
- Across-run bias was greater in the remote setting compared to the laboratory setting.
Conclusions:
- Remote CLS administration is feasible with controlled stimulus and noise levels.
- Remote CLS reliability needs improvement, particularly regarding across-run bias.
- Further research is warranted to optimize remote CLS protocols for enhanced accuracy.
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