I’ve got pretty bad hearing, and since I don’t have hearing aids in when I sleep, I set an alarm that is raucous, buzzes through earbuds that I sleep with, vibrates the entire bed, and I’m looking into flashing lights as well.
I would hope there’s a strobing fire/smoke alarm on the market.
I have a Google Nest smoke/CO detector. It’s super loud when something happens and it can be controlled by a phone app which has functions for the hard of hearing like the phone buzzing or the alarm playing through speakers. I imagine all smart smoke detectors have something similar.
Apparently there are some devices you can put under you pillow that will shake when an alarm goes off.
The specialized alarm, commonly referred to as a ‘Bed Shaker,’ is installed next to the bed, and alerts those in the home using a strobe light and vibrating pad that can be placed under the mattress or pillow. It’s activated when an accompanying traditional smoke alarm sounds.
My iPhone has a setting for the flashlight to flash when the phone is ringing. If that could be connected to the Google Nest, then there would be a flashing light when the smoke detector goes off.
I wear aids since age 60, am 64 now, and will probably be in deep hearing shit by the time I’m 80 in 15 years. If my ears last that long.
For the last few years I had been dealing with my late aged MIL’s profound hearing loss. Which included getting her all the gizmos you mention and more.
My advice: Check out these folks.
They’re not the only decent vendor, but they’ve got a decent assortment and you’ll learn some vocabulary for further searching.