Take you own data, guys! The Radio Shack meter I bought works fine. Just be sure you know what you are measuring. The number of different scales and systems is boggling, and they don't actually translate. Mostly, the dBA scale is used in regulations. Take several readings with the mike in several places, and then average the data. The meter I use is a digital one, but similar to this:
http://www.radioshack.com/product.as...t%5Fid=33-4050