Whistling air lock

I am sitting here looking at the new threads and what not here at HBT and i keep hearing this faint whistle every now and then. I look behind the big leather wing back chair where i stuck two fermentors to keep them out of the sun and one of the air locks must have some slim holes in its top. Every time it bubbles it gives of a slight whistle.

I am telling myself that the yeast are happy and whistling while they work.........................Hmmm, there is a beer name here some where.

Whistling Wonder?
Whistling Wet Wonder?
The Hop Whistler?

Whistling Pig Red (but it's been done)

SWMBO's nostrils make that noise at night when she has allergies.