Last night on British TV a device emitting high pitched sound waves to drive under twenty nuisances away from shops was demonstrated.
Over twenties cannot hear the soundwaves which sound very much like personal alarms when amplified. So much for audio experts. We oldies haven't got a chance.
I remember my son asking me about some background music on an Album in the 70s and I couldn't hear it. NOW I know why. Our ears get less sensitive after the age of twenty!
I now get a hissing in my ears listening to CDs so what has changed from listening to Elvis on Vinyl
Poor ol' Ludwg Van Beethoven!
I heard that Colin!!!