I'm about 3 years younger than you and I've also always prided myself on my hearing and ability to pick up high pitched noise. Even as a kid and a teenager I noticed sounds my peers didn't, often to my own agony as they are unwelcome sounds. I still hear sounds others my age don't (office halogen tube lighting ruins me) but I know I won't have that "ability" forever. So I sympathize very very much with your fear, Tom.,(reply>), If you can't hear the morse code at the end card, put a portable AM radio tuned to around 530 KHz up to your computer's speakers. You can clearly hear it thru the AM radio. Turn up your computer's volume to max.