Soundwalk.

A soundwalk is an excursion whose main purpose is listening to the environment. Moreover, the soundwalk is also used as artistic medium by visual artists and documentary makers.

This is a soundwalk in Times Square:
https://www.youtube.com/watch?v=Jn5svvMP-Mc

I also made a soundwalk in Falmer Station:
https://soundcloud.com/vivian-436556593/train-station-1