Dilation
Dilation is like doing scaling on one of the axis and area is the same after the process. When a > 1, it's expanding on time axis, and narrowing on frequency axis ;vice versa when a < 1.
STFT, Gabor:
WDF:
When this kind of dilation is applied to audio, it causes a chipmunk effect.
Read more about this topic: Motions In The Time-frequency Distribution