web cam sound

What has happened to the sound on the web cams? All I hear is a buzzing sound and that has been like that for along time.
A Place for Those Born Too Late...
http://coloradonewmexicosteamtrain.org/FriendsForum/
http://coloradonewmexicosteamtrain.org/FriendsForum/viewtopic.php?f=79&t=7908