Noise is a subjective issue. What one person finds noisy, another will not. I had a rather pointless discussion with a rocket scientist some time back who wanted to use wind tunnel facilities and a hand held decibel meter, trying to explain this. Please look back a few pages - it may provide some information - and perhaps some entertainment too.
Regarding the noise level in the SOLs, read the next post by Hunkofgals, who reports low noise. Personally I don't find the SOLs any noisier or quieter than other comparable brands but until someone comes up with a scientific method of measuring all parameters, that's just my opinion.




. That's why the price is highly fluctuating from place to place. 





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