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Sound Intensity Level

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Humans perceive sound by hearing. The human ear helps sound waves reach the brain, which then interprets the waves and creates the perception of hearing. The loudness of the environment in which a person is located determines whether they can distinguish between different sound sources.
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Related Experiment Video

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A Low Cost Setup for Behavioral Audiometry in Rodents

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Published on: October 16, 2012

Measuring tinnitus loudness using constrained psychophysical scaling.

Lawrence M Ward¹, Michael Baumann

¹Department of Psychology, University of British Columbia, 2136 West Mall, Vancouver, BC, Canada. lward@psych.ubc.ca

American Journal of Audiology

|July 30, 2009

Summary

This summary is machine-generated.

This study introduces a new psychophysical scaling method for measuring tinnitus loudness. The new method yielded higher loudness measurements than traditional methods, with little correlation to tinnitus impact.

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Area of Science:

Audiology
Psychophysics
Tinnitus Research

Background:

Tinnitus is a common auditory perception.
Accurate loudness measurement is crucial for understanding tinnitus.
Existing methods may not fully capture tinnitus loudness.

Purpose of the Study:

To introduce and validate a novel psychophysical scaling method for tinnitus loudness measurement.
To compare the new method with traditional loudness assessment techniques.
To explore the relationship between tinnitus loudness and its impact on daily life.

Main Methods:

Fourteen adults with tinnitus were trained on a standardized loudness scale.
Participants used the scale to assess tinnitus loudness and non-standard stimuli.
Tinnitus loudness, pitch, and impact (Tinnitus Handicap Inventory - THI) were measured.
A computer-based matching procedure was also employed.

Main Results:

Trained participants demonstrated valid loudness judgments for non-tinnitus frequencies.
The new constrained scaling method produced significantly higher tinnitus loudness measurements compared to sensation levels.
Participants were grouped based on hearing loss, loudness growth, and tinnitus experience.
Tinnitus loudness, regardless of measurement method, showed minimal correlation with THI scores.

Conclusions:

The novel psychophysical scaling method offers a potentially valuable tool for tinnitus loudness assessment.
Tinnitus loudness measurements using this new method exceed those obtained by traditional matching.
A significant disconnect exists between measured tinnitus loudness and its perceived impact on daily life.