Here is the solution. See for yourself: Guess This Noise #10
Recorded at the Museum of Modern Art in Manhattan, with the Nokia N95.
Thu, May 30 2024 in Phoenix, AZ
@ MIM
Fri, May 31 2024 in Tucson, AZ
@ Rialto Theater
Sat, Jun 1 2024 in Sedona, AZ
@ Sound Bites
Sun, Jun 2 2024 in Sedona, AZ
@ Sound Bites
Soulds like the Train Station in Grand Central when the Trains, Tracks, and Times Change on the sign display.
Victor: did you not watch the linked vid?