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Acceptable noise level and psychophysical masking
Dania A Rishiq1, Ashley W Harkrider, Mark S Hedrick
1University of Tennessee Health Science Center, Knoxville, TN, USA.
American Journal of Audiology
|June 22, 2012
Summary
Individuals with low acceptable noise levels (ANLs) may have reduced auditory cortical responsiveness. This suggests a potential link between ANLs and decreased sustained attention, impacting noise tolerance.
Area of Science:
- Auditory Neuroscience
- Psychoacoustics
Background:
- Acceptable Noise Levels (ANLs) describe an individual's tolerance to background noise.
- Understanding the neural basis of ANLs is crucial for addressing noise sensitivity.
Purpose of the Study:
- To investigate whether afferent or efferent cortical pathways more significantly influence ANLs.
- To compare temporal masking responses between individuals with low and high ANLs.
Main Methods:
- 19 normal-hearing adults (10 low ANL, 9 high ANL) participated.
- Tone-in-noise simultaneous, forward, and backward masking tasks were employed.
Main Results:
- No significant differences in masked thresholds were found between low and high ANL groups.
- The low ANL group required more threshold runs, indicating potential differences in response stability.
Conclusions:
- Low ANLs appear associated with reduced afferent cortical responsiveness.
- Findings suggest a possible link between low ANLs and diminished sustained attention.
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