Influence of response-time limits on automated hearing threshold determination.
Marion U Bug1, Melina Strüp1, Sven Vollbort1
1Physikalisch-Technische Bundesanstalt, Braunschweig, Germany.
International Journal of Audiology
|August 28, 2023
Summary
Setting longer response-time limits in hearing tests, specifically at least 1000 milliseconds, can lead to more accurate hearing threshold determination in normal-hearing individuals. This adjustment helps ensure stimuli are truly perceived and reported.
Area of Science:
- Audiology
- Hearing Science
- Signal Detection Theory
Background:
- Automated hearing threshold determination relies on response-time limits to validate stimulus perception.
- Investigating the impact of varying response-time limits is crucial for optimizing audiological testing procedures.
Purpose of the Study:
- To investigate the influence of different response-time limits on hearing threshold levels in normal-hearing subjects.
- To determine optimal response-time parameters for accurate automated hearing assessments.
Main Methods:
- Utilized a two-stage hearing threshold measurement procedure based on ISO 8253-1 (2010).
- Conducted pre-tests with response times of 600ms, 1000ms, and 1200ms.
- Performed main study measurements across seven octave frequencies (125Hz-8000Hz) with response times of 600ms and 1000ms.
Main Results:
- Threshold levels determined with a 1000ms response time were 2.6dB lower than those with a 600ms response time.
- This threshold shift was consistent across all tested frequencies.
- Confidence intervals indicated a significant trend towards lower thresholds with longer response times.
Conclusions:
- Response-time limits of at least 1000ms for both stimulus onset and offset are recommended for automated hearing threshold determination.
- Implementing longer response times can improve the accuracy of hearing threshold measurements.
- This finding has implications for standardizing audiological testing protocols.
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