The change of direction, or beriding, of a sound wave as it passes from one medium to another.
"I am very pleased with and impressed with the quality and timelyness of your service on transferring my LP Merle Haggard "Rainbow Stew,Live at Anaheim Stadium". I previously had this on cassette but lost it and upon trying to replace it I discovered it is out of print. I spent counless hours on the internet to find the LP,and now thanks to you ..."