[PeteD]

brucek wrote:

Comparison testing against a professionally calibrated ECM8000 using several samples of each meter type. The lowest frequency chosen for each meter type was determined experimentally.

Personally, I think it's a bit silly to measure response below 10Hz.....
brucek

I realize they were compared to a reference mic - I meant how were the tones measured generated? Are they at a certain SPL?

Since there are already movie soundtracks with content in this area (War of the Worlds, Black Hawk Down, Hitchhikers Guide) of less than 10Hz, I don't think it is that silly...unless the sub rolls off below 20Hz, then I agree.

Thanks,
Pete