Doesn't perk my ears up, but, it's hard to say.
As TaterGun said, the bucket test is the simplest way to convince yourself. Personally, I like to put the bucket on the step inside the pool so that it stays at the same temperature as the rest of the pool water. Put a heavy rock in the bucket (so it's not going anywhere), and equalize the level of the water in/out of the bucket and let it sit on the step inside the pool or 4-5 days. If you can detect any difference in the level inside vs outside the bucket, then you have a leak.
Make sure it has enough height above the water line to keep the waves and splashes out. I like to pull it out of the water when the kids are playing, just to remove the temptation of them using it as a toy.
Good luck!