I don't think that a Chrysler siren can necessarily clear fog, as it draws air in from behind the chopper-head, and so you basically have fog taken in and blown out of the siren.
Many sounds loud enough can cause bleeding from the pores, the degree of bleeding varying upon the sound pressure applied on the human subject. Any large siren will cause death at point-blank simply because of the neurological damage, which may be the absolute case, even.