[sionnsar]

I’m thinking fifteen feet separation should be enough to keep me in the clear.

Not always. Totally open space, probably... but I've encountered situations where the sound carries a mile or more.

[NicknamedBob]

Well, I meant clear from ghostly reprisals.

As for protection from the sound itself, I’m a bit torn. I could go with standard stuff-it-in-your-ear protectors, or maybe high-tech noise cancelling headphones, or, under extreme duress, even simply endure the onslaught.

[sionnsar]

I’m too worn out — I am off for the night. See you tomorrow, hopefully.