SOUND-SOUND INTERACTION
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Answer |
Upward masking.
In the first case, the lower tone quickly masks the
upper one, and you probably could only hear the first 3
or maybe 4 steps of the ramp. In the second case, the upper tone fails to mask the lower one, and you probably heard 8 or 9 steps of the ramp. This illustrates the masking diagrams which showed that masking affects frequencies above the masking spectrum much more, and much less below it. |