Originally Posted by dominguez1
What db is the threshold for pain in the ULF range?
Good question, had to look this one up...
According to this NASA Lift Off research paper: http://www.dtic.mil/dtic/tr/fulltext/u2/a081792.pdf
>165db ripped eardrums
>160db eardrum damage is likely
153-160db technically safe, but not really recommended still.
153db caused severe discomfort: choking of the throat. hard to breath. severe nervousness. Highest recommend SPL (even with lawyers waived.)
140-150 nervousness is induced
137-145db chest/lung movement noticed, very distracting. Modulated speech. (SPL reached inside Space Shuttle at launch.)
120db all frequencies are clearly audible, and start of annoyances, feel like underwater, nausea-sensitive people affected
105-130 caused a drunken-like condition in math tests
So lets call 153db a full 6 Stars and 5+ some in-between scale... I don't think anybody would want to have a choking experience when watching movies,
perhaps as a short bassheaded system-demo though. That should keep the system builders busy for the next 100 years...