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Aubergine Agonistes
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- TL;DR Summary
- Asking how large corner reflectors need to be to reflect road noise (800 Hz -- 1300 Hz)
I'm contemplating extending the concept of corner reflectors to wavelengths in the audible spectrum, specifically road noise. I read somewhere that road noise is predominantly between 800 Hz and 1300 Hz. The corresponding wavelengths (at 20°C) are 16.9 inches and 10.4 inches.
I read elsewhere that the planes of a corner reflector had to be "several times the wavelength" of the frequency of interest, but that was in relation to RF signals. That size fudge factor is acceptable when the wavelengths are minuscule, but the size becomes much more important when dealing with longer, audible wavelengths.
My question: To reflect all road noise do I need corner reflectors that are, at minimum, 17 in. x 17 in. x 17 in.?
I will have multiple reflectors (5-sided cubes) side-by-side like pigeonholes, either single or multiple tier, which I will place on top of a brick wall.
I read elsewhere that the planes of a corner reflector had to be "several times the wavelength" of the frequency of interest, but that was in relation to RF signals. That size fudge factor is acceptable when the wavelengths are minuscule, but the size becomes much more important when dealing with longer, audible wavelengths.
My question: To reflect all road noise do I need corner reflectors that are, at minimum, 17 in. x 17 in. x 17 in.?
I will have multiple reflectors (5-sided cubes) side-by-side like pigeonholes, either single or multiple tier, which I will place on top of a brick wall.