My Oreck commercial vac is quiet..
I too got very tired of ear-splitting, short lived shop-type vacuum cleaners.
The Oreck Commercial is quality in every way, but it did set me back about $600.00.
However, I did have a muffler put on a previous (non-Oreck but popular brand) vacuum. I joked to the vacuum dealer about the noise. I said he should put a muffler on it. And he did! He had a vacuum-cleaner muffler in stock. It took the shrill off of the noise which did help somewhat. Added about $20 to the bill. That vacuum cleaner only lasted a few years whereupon it too took a dump.
