"It will not reverberate more in the silence. The amount of mechanical energy does not increase. It may be masked by other sounds, but it is not diminished.

Speaking from an unqualified position, the mechanical energy may be reinforced by the additional sounds if there were appropriate harmonics. Maybe someone can add to this while I go see if this is correct.

"

"I living in the LP or lower penusula of Michigan in the USA

many people are hunters and many people own some kind of fire arm

shot guns are easy to come by in the fall for the start of rifle season to kill dear for meat

if a zombie were to show up after the opening weekend it woul have both of it's legs blown off

many people also own some kind of truck no matter what company you bought it from the human body doesn't hold up well if it is run over so parking a two ton vehicle that is traveling several miles an hour or for the rest of the world kilometers that are 1.5 kilometers per one mile and hour

also I own a machete they are also easy to come by there are trails in the woods but they help for close combat there is also no back ground check for them so saddly even the criminals have them, but criminals normaly don't have rifles or shot guns

pistols are nice but they don't have the stopping power of a 12 gauge shotgun or 30-odd-6
don't worry about shooting the head go for the legs it a zombie can't walk it will crawl toward food I mean you a sledge hammer or other weapon like a soft ball bat it is aluminum and not wood may do the trick

there is always a good and well stocked harware store near by

also for those who no about IED or improvised explosive devices or trapping
place traps or bombs around a improvised fortress if a zombie comes by the trap can take care of them"