Inaudible ultrasound attack can stealthily control your phone, smart speaker
…microphone activations, which have dedicated on-screen indicators on iOS and Android smartphones. And just using earphones also cuts out that sound being able to travel to smart speakers. See https://www.bleepingcomputer.com/news/security/inaudible-ultrasound-attack-can-stealthily-control-your-phone-smart-speaker/…