Bosch 300 series... 44db
Old Whirlpool model.. 69db
In all fairness, I probably wouldn't have bought a Bosch DW if it weren't for the discount. Retail price is $1590 + tax... but my all-in price was less than $1k
If I had bought it a year earlier, I think it might've been another 15-20% cheaper as I helped my family member buy a 500 series for what I paid for mine now.