Removing low-frequency energy from a target beyond 15 dB no longer impairs speech reception

Evidence

SRTs first increased linearly from 0 to 15-dB attenuation and then remained constant for further attenuations. Intelligibility was not disrupted any longer after filtering out the target by 15-dB attenuation. — Dijk, Pim van, Physiology, Psychoacoustics and…, 3556