Installing a new muffler on a 1987 Ford F800 dump truck with a 7.8 Ford diesel motor.
Tools used
Angle grinder:
Welder:
1/4 impact:
1/2 impact:
chop saw:
4" band clamp:
floor jack:
decible meter:
Noise Level (dBA) Maximum Exposure Time per 24 Hours
85 8 hours
88 4 hours
91 2 hours
94 1 hour
97 30 minutes
100 15 minutes
103 7.5 minutes
106 3.7 minutes
109 112 seconds
112 56 seconds
115 28 seconds
118 14 seconds
121 7 seconds
124 3 seconds
127 1 second
130–140 less than 1 second.
