I wonder how they discovered that "clicking" works, seems so counterintuitive to discover. Though it's fair that I don't spend anywhere near that much time listening carefully and noticing how sharp sounds reflect.
> I wonder how they discovered that "clicking" works
I won't think it's they unexpected - have a walk a forest with loud insects. You'll hear a lot of interesting noises shaped a lot by what you stand near to. Large trees especially change how you hear things quite a lot.
Before practical applications, my first thought was a grade-school science fair entry. It’s novel enough for judges not to have seen it for a couple of years.
- adaptive sports for visually impaired players like beep baseball?
- robot swarm members knowing their relative 2d position with a single microphone? (frequency for angle, amplitude for distance)
- a cheap, durable way for human workers to track the rotation cadence of slowly rotating machinery?