I might suggest that we measure in decibels with the meter near the area of the riders ear. I am a safety director for a construction company and we do this often on all types of equipment. There are analog meters, they have a needle, and digital meters. Both should be plenty acurate for our uses. This evening I'll do my SM with the long slash cut Speciality Spares and my America with drilled out TOR's. It should be interesting.
Sincerely, Old 52
PS Also should be done outside in a relatively open area for consistancy, a garage puts to many variables into the mix.
