If you're talking super loud and can't hear normal house sounds after you take off your headphones, you were listening too loud.
There are far too many variables to consider. Assuming a quiet environment, the best thing to do is to start out at just a tad lower than normal volume, and wait for your ears to adjust (usually a few minutes). You can then continue to lower the volume very slightly every few minutes. You'll soon find that the volume you started out at is uncomfortably loud.