I think what people mean when legislation measuring at 100 dB-A is an oxymoron. dBA was meant to mimic the equal-loudness curve at low level of listening (around 40 dB spl @ 1k) and is absolutely not representative of the relatively linear curve around 100 dB SPL @1k.
The wikipedia articles on psychoacoustics are quite good. http://en.wikipedia.org/wiki/Equal-loudness_contour http://en.wikipedia.org/wiki/A-weighting _______________________________________________ Sursound mailing list Sursound@music.vt.edu https://mail.music.vt.edu/mailman/listinfo/sursound - unsubscribe here, edit account or options, view archives and so on.
