Near-Ultrasound Inaudible Trojan (NUIT): Exploit Your Speaker to Attack Your Microphone What is NUIT? NUIT is a novel inaudible attack against voice assistants (Siri, Google Assistant, Alexa, Cortana) that can be waged remotely through internet. Nuit appears as a sound clip in near-ultrasound frequency range (16kHz-20kHz), thus can be played on the victim's COTS speaker to attack the voice assis