Modulation-based analysis underlies the AC model’s matching of measured thresholds.

Evidence

Figure 3 shows model predictions. Since the binaural pathway is the same in both models, predictions of the two models do not differ for the dichotic target signals (bottom panels). Both models predict no effect of the interferer on threshold, in contrast to the data. For the diotic 730-Hz target (top left panel), the energy-based AC model predicted no change in threshold when the interferer was added. In contrast, the modulation-based AC model predicted an increase of about 5 dB when the interferer was added 30 Hz below the masker compared to the condition without interferer. For an interferer 100 Hz below the masker, threshold was about 2 dB lower than for the interferer 30 Hz below the masker. Thus, only the modulation-based AC model predicts the effect of the interferer on thresholds for the diotic 730-Hz target. — Dijk, Pim van, Physiology, Psychoacoustics and…, 3489

Categorization

• DEFINE: Distinguishes ‘modulation-based AC model’ from ‘energy-based AC model’ as the mechanism accounting for interferer effects.