Where are you guys coming up with 100-db. levels for the 30i? Believing that the 35d is producing more than 100-db. is ridiculous. 100-db. is roughly the sound of a passing subway train at 10-feet or the average human yelling.

In fact, the loudest a human can yell is usually about 120-db. for VERY short spurts.

There's absolutely no way the 30i is putting off 100-db., unless it's under all-out acceleration.

That sounds loud even for a late model Ferraris at full acceleration which usually puts off no more than 99 to 100 decibels, when one is standing directly next to the exhaust.

Goggle for verification...