This following bit is from The Black Ice, the second novel in the series by Michael Connelly about Los Angeles police detective Hieronymus Bosch:

I love that Connelly, back in 1993, foresaw Eric Eberhardt’s long-running youarelistening.to project, You Are Listening to Los Angeles, which pairs meditative music and police scanners. The original site suffers today from the inevitable situation in which embeds stop functioning dependably (something my own site’s older posts are rife with), but you can check out recordings in Eberhardt’s NTS.live show.
The author Warren Ellis, in his 2013 novel Gun Machine, quotes his own fictional detective, John Tallow of the NYPD, referencing Eberhardt’s work:

Eberhardt started You Are Listening to Los Angeles in 2011 and later expanded it to other cities. As he said to Roman Mars on the 99% Invisible podcast, “Some people think it’s peaceful. Some people think it’s creepy.”