Prediction of absolute thresholds and equal-loudness contours using a modified loudness model

Area of Science:

• Acoustics
• Psychoacoustics
• Auditory Modeling

Background:

• The Moore et al. loudness model (1997) is foundational for the ANSI standard on steady sound loudness calculation.
• This model exhibits inaccuracies in predicting absolute hearing thresholds from recent ISO standards.
• Accurate prediction of auditory thresholds and loudness perception is crucial for audiology and audio engineering.

Purpose of the Study:

• To enhance the predictive accuracy of the Moore et al. loudness model for absolute hearing thresholds.
• To validate the modified model's performance against established ISO standards for auditory perception.
• To improve the model's ability to predict equal-loudness contours.

Main Methods:

• Modification of the middle-ear transfer function within the existing loudness model.
• Comparison of model predictions with absolute threshold data from an ISO standard.
• Evaluation of the modified model's accuracy in predicting equal-loudness contours from an ISO standard.

Main Results:

• The modified loudness model demonstrates significantly improved accuracy in predicting absolute hearing thresholds.
• The adjusted model provides reasonably accurate predictions for equal-loudness contours.
• The revised middle-ear transfer function is key to enhancing the model's predictive capabilities.

Conclusions:

• Modifying the middle-ear transfer function enhances the Moore et al. loudness model's accuracy for absolute thresholds.
• The improved model aligns better with recent ISO standard data for hearing thresholds and equal-loudness contours.
• This refinement offers a more reliable tool for assessing loudness perception and auditory thresholds.