Phased Array Safety Sound Emitter

Trams are damn near silent. Electric cars more and more. If you’re walking over a track with your headphones in, there’s no chance of hearing it. Unless it’s equipped with a phased array sound system that is! A regular speaker has an isotropic wavefront: You can’t control it’s direction. But with a phased array you can use beamforming maths to essentially point a large amount of energy in one direction (with a couple of sidelobes which you can’t avoid) meaning you can essentially create a loud spot some distance ahead of you without making a bunch of noise for everyone on either side (‘cept for the side lobes). Any govt who runs trams that doesn’t buy one is basically negligent because they haven’t done enough to keep pedestrians safe!

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