sentence: The differential effect of age consistent with CS in the Prendergast et al. ( 2019 ) was found on a speech reception in noise task , but the Johannesen et al. ( 2019 ) study , that also had a large sample size and included participants over a wide age range , did not find differential effects of age at high and low stimulus levels consistent with age-related CS on speech reception in noise tasks.The primary aim of the current study was to test the hypothesis that age-related deficits in the processing of supra-threshold sounds are greater in conditions that are thought to rely on L / M-SR fibers for stimulus coding : namely stimuli presented at a high SPL , and within a noise background .