And while we are in the subject of sound localizing may I take the liberty of introducing my new raspberry pi sound localizing audio recorder.
https://github.com/hcfman/sbts-aru
It installs with one command on all Raspberry Pi versions and synchronizes the system time to less than 1 microsecond of error with a cheap GPS.
With three of these I’ve been able to sound localize the explosions from illegal fireworks to a specific car park from more than 3km away with lots of houses in between.
When I got to the car park I could smell the sulphur from the fireworks.
This will even run on a Raspberry Pi zero running of a battery with a 6 euro neo 7m gps and a 6 euro usb mic.
I remember visiting Goonhilly Earth Station as a boy (a collection of huge satellite dishes at the very tip of Cornwall, UK) and they had two small (~2 or 3m diameter) dishes facing each other on either side of the visitor centre. Completely blew my mind to hear someone whispering from all the way across the room!
https://www.google.co.uk/maps/place/Sound+Mirrors/@50.956379...
There are also some more accessible, but smaller, ones along the cost at https://beyondthepoint.co.uk/sound-mirrors/
Note "The only way of seeing the Denge sound mirrors close up is during one of the public open days run by the RSPB. There is no public access to the Dungeness mirrors, which are in the middle of a disused gravel pit. Contact the RSPB for the dates of future open days."