CROSS PDE.

This box was found by Tullis, sometime in mid-April, late in the evening:
I’m a big fan of Matilde’s work with humming telecommunication boxes. I was really excited to find one myself.

I was cycling home fairly late at night. A combination of a particularly peaceful evening and deciding to take an alternative route home, meant that I stumbled across this box, which I stopped and listened to for quite a while, with a grin on my face. As if my neighbours don’t think I’m strange enough as it is.

Producing a continuous sound composed of:
48Hz
237Hz
379Hz
533Hz
873Hz
1116Hz
1720Hz
2603Hz
3474Hz

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