Our ears are the original nexus of information security. The environments we're in are constantly streaming valuable information to us. All we have to do is listen properly. "Let he who has ears" and all that. Join me as we explore the fascinating world of audio security. We'll cover:some meta information about audio the basics of digital signal processingthe fascinatingly complex world of determining what "silence" meansmodern machine learning approaches to sound event detectionattacks on audio interfaces like Alexa