I heard doing something like that or having a cell phone ring would cause the TV to go into a fit.
The only TV i remember having a functioning ultrasound remote was our old Magnavox 'Star System' Touch Tune Color TV. it was the first TV ever to have an On Screen Display. the remote you could hear the tones and such. a lot like a garage door opener. the only 'problem' it had was we lived near an airport so any time an airplane flew overhead and transmitted the TV would turn itself off. or turn on. same with our garage doors, we'd come home to find at least one of the three open.
The sad part is that if you find a TV the remote is either MIA or non-functional and universal remotes won't work with them. i wonder what freq they use since i could always get handy with a soldering iron and 'build' a emitter which would at least turn on the TV so i don't have to go to the front to turn it on or off. yes i've gotten that lazy esp since the TV is in my bedroom and i like to watch it as i wake up and don't feel like getting up to turn it on. more natural to just pick up the remote and hit power.
when i was younger (and had a child's voice) i could 'imitate' the sound of the Magnavox's remote since i heard them so often (i've got great ears capable of hearing the sound of ultrasonic remotes plus dog/deer whistles quite well) and could turn the TV on or off without the remote and was so talented it helped when the battery died lol! plus it worked great during my sister's birthday parties as a magic trick. the human remote control!
I still want one of those TouchTunes. they had the coolest
OSD channel display.
Less advertising throughout
