>Precise Find for Indoors.Comes with Ultra-wideband (UWB) ...
I was playing with the UWB on my Samsung S23 my cat was beside me. As I enabled it she jerked her head towards my phone. I know UWB is far beyond a cat's hearing range but whatever it was she instantly noticed it. No pain or anything she didn't run away but looked at it as if she could detect something.
Could your cat perhaps have heard the sound of the whine of the electronic components? Maybe an interference with your phone and other electronics close by. Just a shot in the dark
UWB is RF, not sound, and your cat didn’t hear it. It could be that the app you were playing with also happened to play a sound in addition to turning on the radio, or possibly your radio happens to resonate at some audible frequency.
Consider that in the US, UWB is RF higher than 500MHz, and I’d be shocked if your phone’s speaker went all the way up to 20KHz, which is generally considered to be the upper limit of the human hearing range.
I was playing with the UWB on my Samsung S23 my cat was beside me. As I enabled it she jerked her head towards my phone. I know UWB is far beyond a cat's hearing range but whatever it was she instantly noticed it. No pain or anything she didn't run away but looked at it as if she could detect something.