What’s the train noise like at Burnham Station? This is data from a prototype, but it was super-easy to setup. Right now it’s sitting in the ‘lab’ with the window open, taking an averaged reading every 20 seconds and uploading it to Thingspeak.

Let’s see what we get…

A huge thanks to user RING67630 at the Arduino Forums for identifying this cheap, hackable, sound level meter. Powered from a 9V source -> Linear Regulator -> 5V to Particle Photon and ‘Digital Sound Level Meter‘ -> reading 10mV/dB from the DC output jack. Took a couple of hours to assemble and code.

The plan is to get this outside in a rain-proof open box and start managing a real-time record of sound levels around here… And, v2.0 will be solar powered

Let’s listen for the trains, shall we?

Edit – An updated plot including the maximum reading during each period. I still don’t know how to separate the y-scales yet… working on it…

And… more (the averaged dB):

And (the max dB):