60 and love this stuff.  Got an app that tells me whether that high pitched sound is in my head or not. It's just a frequency display app for a phone, but it's been nice to see what sounds are around that I'm not sure about.,(reply>), What is the app?  I want it,(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.