I think it's lame to limit the detection to just gun shots. Like the web has analytics, I think real life could have audiolytics. One example: I can collect all the data I want from my backyard and give a report to my neighbor about exactly how long and how loudly their dog has been barking.
I can hear which birds have been in my backyard.
I can... hear what a customer says about my product in-store and offer them coupons at checkout or later or get feedback about my product...
I would actually really love to live in a world where I can have a reasonable expectation of privacy when going about my day. A personal bird recorder is fine, but I absolutely would not want a networked system of sensitive microphones available for unlimited data gathering spread across my town. The prevalence of Ring cameras already makes some neighborhoods havens of surveillance, I’d rather we not expand things like that.
I can hear which birds have been in my backyard.
I can... hear what a customer says about my product in-store and offer them coupons at checkout or later or get feedback about my product...