olemus
väljastus kahjurvaralt arvuti valjuhääldile ultraheliribas, tundlike andmete saatmiseks ja kahjurvara levitamiseks
= using by malware a compromised computer's sound card and speakers to send data hided in covert ultrasonic radiation

ülevaateid
https://www.audicus.com/acoustic-malware-the-latest-threat-to-computers/
https://blog.systoolsgroup.com/malware-through-soundwaves/