3 ms·
In the late 80s I worked in a low cluster of buildings, each of which was topped with a band of vertical ridges spaced about 4" apart (sort of like a corrugated
by dtgriscom 1y ago
In the late 80s I worked in a low cluster of buildings, each of which was topped with a band of vertical ridges spaced about 4" apart (sort of like a corrugated roof, but with vertical corrugations). One day a thunderstorm came through, and we discovered that the pulses of thunder, when they hit the corrugations, reflected as a quickly falling tone. The corrugations were working as an acoustic diffraction grating, with different frequencies reflecting in different directions.
- _spduchamp 1y agoI love corregated concrete! Those highly ordered early reflections can make a cool sound if you stand about a few feet away and clap your hands. I've wondered if it was possible to vary the bands to encode a designed sound in the reflection. Probably.
- ItCouldBeWorse 1y agoWait, so you could encode a forrests-leaves-swaying in the wind sound- into corrugated concrete?
- _spduchamp 1y agoNot sure about that, but more like using Impulse Response techniques like in convolution reverb, to craft a short sound that reflects back given a burst of sound like a clap. For long sustained sounds using evenly space round rods can create sound with wind, like an Aeolean harp.