Modulation transfer functions (MTFs) of a modulation filter with a BMF ≈ 80 Hz, assessed using 1000-Hz AM tones presented at 30 (panel a) or 70 dB SPL (panel b) that were sinusoidally modulated with f_mod frequencies between 10 and 130 Hz. The MTFs are normalised to the maximum model response across the tested f_mod frequencies. Literature: Figures 4–6 from [92] and Figures 1 and 4 from [93].