I think what you really need is a meter which reads Leq(m) like the Dolby 737 or equivalent. The LM100 won't give you a reading of 82; it's reads backwards from full scale. i.e -27. The 737 gives you positive numbers (that relate to spl I think). The curve is also a little different than an Leq(a) or the BS.1770. IIRC It has a peak in the midrange and is called the "annoyance curve".
I think one of the DK meters has an Leq(m) option too.
-Richard
p.s.
http://www.dolby.com/uploadedFiles/z...el737.Spec.pdf