Sort-of sound mirror related, but adults only…
There is some discussion in the associated forum about the mathematics of mirror shapes, for those of us who have long-since forgotten the difference between a parabolic curve and an elliptical one.
Acoustic early warning systems, spectacular remnants of a dead-end technology on the British coast
Sort-of sound mirror related, but adults only…
There is some discussion in the associated forum about the mathematics of mirror shapes, for those of us who have long-since forgotten the difference between a parabolic curve and an elliptical one.