I picked up a sound level meter at Radio Shack. Not a certified precision instrument but probably reasonably accurate.
Results are somewhat disconcerting (literally)
1. California noise limit (20" distance, 45 degrees from the exhaust in idle at 3/4 of full power revs should be less than 95dBA). Well, I got about 109 dBA :shock: Maybe I did something wrong with the measurement?
2. Drive-By at 50 feet and 50 mph: I measured about 89-93 dBA (compared to 70-75 dBA for the typical tintops)
3. Most troublesome: in the cockpit at full freeway speeds I had more than 112 dbA. That is BAD :oops: I am using earplugs most of the time and anyway on longer blats but I will be using them more diligently now. I got already a hearing loss and Tinnitus and don't need to make it worse.
Gert
P.S.: I can set off car alarms by driving by 8)
Results are somewhat disconcerting (literally)
1. California noise limit (20" distance, 45 degrees from the exhaust in idle at 3/4 of full power revs should be less than 95dBA). Well, I got about 109 dBA :shock: Maybe I did something wrong with the measurement?
2. Drive-By at 50 feet and 50 mph: I measured about 89-93 dBA (compared to 70-75 dBA for the typical tintops)
3. Most troublesome: in the cockpit at full freeway speeds I had more than 112 dbA. That is BAD :oops: I am using earplugs most of the time and anyway on longer blats but I will be using them more diligently now. I got already a hearing loss and Tinnitus and don't need to make it worse.
Gert
P.S.: I can set off car alarms by driving by 8)
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