Speech reception threshold experiments sometimes need extra conditions to reach stable performance

Evidence

Four experiments were conducted to test each filter type (HP or LP) on each source (target or masker). Except for experiment 1 (HP target), each experiment was composed of two sub-experiments of eight conditions because no asymptote was reached with the first set of eight conditions. — Dijk, Pim van, Physiology, Psychoacoustics and…, 3550