Tone, noise, and independently modulated tone maskers produce equal speech masking.

Evidence

The third was comprised of the same 16 tones, but each tone was modulated independently with the temporal envelope of a noise masker, bandpass filtered using a vocoder filter with the same center frequency as the tone carrier. These three maskers produced equal amounts of speech masking in the CI users tested by Oxenham and Kreft ( 2014 ). — Dijk, Pim van, Physiology, Psychoacoustics and…, 2177