(01 Jan 2015, 11:54 am)aureolin wrote Seems sensible that they don't want everyone fiddling with them. If there's an inconsistency across the fleet, they'll end up with complaints they're too loud and complaints they're too quiet.
That and there is auditors that go around undercover to check on these things, so if they're too quiet they will get found out. They are too loud when installed though, practically shouting. Passengers did complain.