A gated tone sounds continuous at a level called the pulsation threshold

Evidence

This particular value of the test-tone level is called the pulsation threshold. It should be mentioned that if the test-tone level is decreased further, the test tone continues to be heard as a continuous tone until it reaches absolute threshold and disappears. In the pulsation-threshold technique, the “masker” does not really mask the test tone, but gives rise to the continuity phenomenon. — Professor Dr.-Ing. Hugo Fastl, Professor Dr.-Ing. Eberhard, Psychoacoustics- Facts and Models, 590

Categorization

• DEFINE: Defines the pulsation threshold technique and the continuity phenomenon operating behind it.
• corroborated: 2 independent passages support this claim — Professor Dr.-Ing. Hugo Fastl, Professor Dr.-Ing. Eberhard, Psychoacoustics- Facts and Models, 590