I have no idea what standard is employed for measuring dishwasher noise, but for what it's worth:jmo said:
That's what we did yesterday! I'm still not certain that the "upgrades" are worth $120. Will I really know the difference between a 50 db and 46 db machine? Our current dishwasher sounds like a helicopter, so really anything is an improvement.
jmo - For most purposes, you can run your Bosch on the express cycle, which is one hour. Try it.
jmo