From Colonel Froth....
I was going to say that if you have access to a smartphone you can take basic noise readings. There are applications which measure db readings over time like this and this and have varying levels of other features. None will be as good as the proper tooling mainly because they use the phone's microphone which is optimised for human vocal frequencies. (Although if playing.. uh.. experimenting with these devices is something that someone were keen on, android can read microphone data through the mini-jack headphone socket if the phone has the hardware.)
I thought it was worth mentioning despite the fact that many of us are as likely to have a smartphone as we are sound level meters.
I think a lot of people would be interested in seeing some comparative readings, I definitely would.
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