I was the same way. At 58, my hearing is still "perfect", but I assume that assessment takes my age into account. I could always hear the whine of computer mo

I was the same way. At 58, my hearing is still "perfect", but I assume that assessment takes my age into account. I could always hear the whine of computer monitors, and was very happy when LCD monitors came out. I could even "hear" Ethernet traffic (10Base-T), but I never understood how or why. It must have been sub-harmonics and/or the PHY coupling transformers emitting ultrasonics.