Here is an interesting article on research in the Surveillance Kingdom (SK) on adding audio listening capabilities to CCTV cameras:
Researchers from the University of Portsmouth in the UK are working on refining AI software that currently allows the cameras to identify visual patterns associated with law-breaking. The plan is to add an audio capability, so that the noise of breaking glass (for example) would cause the camera to take notice and alert an operator. Eventually it is hoped that the AI software would be even more sensitive, according to Dr David Brown, one of the researchers, speaking to the BBC: “Later versions will get cleverer as time goes on, perhaps eventually being able to identify specific words being said or violent sounds.”
Oh what fun could be had with a flash mob armed with tape recorders.