So there is a car i got and had to sell back, Peugeot
508, due to high frequency/pitch noise the electronics made.
Since its not possible to replace any electrical components with ease, i wondered if it would be somehow possible to get a high frequency noise jammer, like radio signals are jammed. That'd be quite hard i suppose so i though maybe high frequency sound blocking cover? Unfortunately not, since the sound comes from behind displays and i cant block them.