In article , Neil Jones wrote:
http://www.yeodoug.com/resources/faq...iselevels.html (Near the
end)

As you say, these are measured in the orchestra rather than from the
audience, but since you are using theoretical extrapolations for 2)
rather than measurement, why not do the same with the figures for the
violin, for example?

Many thanks - some useful figures which are very helpful. However,
as with other measurements taken within the orchestra itself, I know
of no way to extrapolate near field, essentially single-instrument
SPL figures to a SPL for the entire orchestra in the far field region
(i.e. within the audience).

--
John Phillips