I am the least of a 'physics' person yet I find myself here, It is very cold just now in eastern Poland. for a week -20C - 4F very sunny and dry Why do the nearby church bells (100 meters?) certainly have a different sound/higher tone to my ears at least now in these low dry high pressure temperatures? any non-formula suggestions? that a physics idiot could understand? thank you and I hope I have placed my query properly.