Summon your pride, congratulate yourself on your beauty, and remind yourself that these unspeakable devices are beneath your notice. We all hate them. When I see the vacuum cleaner come out of the cupboard or hear the hair dryer being switched on, I make myself scarce. Either I leave the house altogether or find my own safe haven.
What is your safe haven? Every cat needs a safe haven. Mine is on top of a wardrobe in the spare bedroom. It's high up, admittedly a bit dusty, but away from human interference. For some of us it's under the bed: others go and sit in a garden shed: or find a hiding place with the clean clothes inside the airing cupboard.
Humans should never ever disturb us while we are there. There are thoughtless humans that pull us out from under the bed, or harass us while we are on the top of the wardrobe. They should be trained to leave us alone for as long as we need to stay there.
Regaining our composure may take a little time.... But when we feel serene again we can stroll back into our humans' life.
PS. One of the compensations for becoming deaf in old age is that these devices become less scary.