[J.Jensen]

Reading up on our national regulations (Norway) for approval and registration of amateur built vehicles, and the maximum exhaust sound level is 84db.

Has any of you ever measured yours?

An iPhone apparently has a pretty decent mic, so I would really appreciate it if someone would test.

The test procedure describes:
Mic at exhaust level, or 200mm from the ground - whichever is highest.
Mic placed at a 45 degree angle from the exhaust outlet, in the direction giving the most distance from the car

The measurement is to be performed at 3/4 of the maximum power rpm. If this rpm is not available, the test can be performed at 2/3 of the engines maximum rpm.

Does bigger displacement equate to more sound? I´m planning a FIA build with a small block.