Speaking of ANR/PNR and age - this week's entry for 'You know you're getting old when.....'
I use both DCs and Bose at various times. Went for a couple of flights at the weekend, one straight after the other, wearing the Bose and had a raging headache afterwards and didn't know why. Only when I got home and unpacked my gear did I realise I hadn't turned the darned things on.....