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Related Concept Videos

Auditory Perception01:17

Auditory Perception

The auditory system is essential for sound perception, utilizing various critical structures. When sound waves enter the outer ear, they travel through the ear canal and cause the eardrum to vibrate. These vibrations are then transmitted to the middle ear, where three tiny bones – the malleus, incus, and stapes – amplify the sound. This amplification is crucial, as it ensures that the sound vibrations are strong enough to be conveyed to the inner ear. These vibrations then reach the cochlea, a...

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Behavioral Determination of Stimulus Pair Discrimination of Auditory Acoustic and Electrical Stimuli Using a Classical Conditioning and Heart-rate Approach
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Published on: June 6, 2012

Predicting Spectro-Temporal Modulation Detection Thresholds With a Functional Auditory Model.

Lily Cassandra Paulick1, Torsten Dau1, Helia Relaño-Iborra2,3

  • 1Hearing Systems, Department of Health Technology, Technical University of Denmark, Kongens Lyngby, Denmark.

Trends in Hearing
|February 19, 2026
PubMed
Summary
This summary is machine-generated.

Older hearing-impaired individuals show reduced spectro-temporal modulation (STM) sensitivity, impacting speech intelligibility. Auditory models partially predict these deficits but need refinement to capture individual differences and supra-threshold processing.

Keywords:
auditory modelingsensorineural hearing lossspectro-temporal modulation processingsupra-threshold processing

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Area of Science:

  • Auditory Neuroscience
  • Speech Perception
  • Psychoacoustics

Background:

  • Spectro-temporal modulation (STM) sensitivity is crucial for speech intelligibility in noise.
  • Underlying auditory mechanisms for STM detection are not fully understood.
  • STM sensitivity may serve as a marker for auditory processing deficits.

Purpose of the Study:

  • To measure STM detection thresholds in young normal-hearing and older hearing-impaired listeners.
  • To evaluate the predictive power of the Computational Auditory Signal Processing and Perception (CASP) model for individual STM performance.
  • To investigate the contribution of peripheral auditory system damage to STM deficits.

Main Methods:

  • STM detection thresholds were measured across six conditions varying spectral (0, 1, 2 c/o) and temporal (4, 12 Hz) rates.
  • The CASP model was individualized using audiometric and Adaptive Categorical Loudness Scaling (ACALOS) data to estimate hair cell loss.
  • Group comparisons were made between young normal-hearing and older hearing-impaired listeners.

Main Results:

  • Older hearing-impaired listeners exhibited significantly elevated STM thresholds compared to young normal-hearing listeners, especially at higher spectral rates.
  • The CASP model simulations replicated general threshold patterns but underestimated group differences and interindividual variability.
  • Model sensitivity to estimated hair cell loss was limited, suggesting the involvement of supra-threshold processing.

Conclusions:

  • STM deficits are prevalent in older hearing-impaired individuals and affect speech intelligibility.
  • Current auditory models like CASP show potential but require enhancements in peripheral and central processing representations to accurately predict individual STM performance.
  • Supra-threshold mechanisms play a significant role in STM detection deficits beyond peripheral damage.