Ed and Matt,
I noticed on your home page under New Quieter Blowers that you state, "We have reduced the noise level of our blowers by 10 dB which represents a 50% reduction in noise level." It actually represents a reduction to 0.1 the original noise power (a 90% decrease) or to 0.316 the original sound pressure level. I notice that Bill Pentz made the same error on his site ; it's one of the very few technical errors I've found in his work. The 10 dB reduction is very significant.
bababrown
I noticed on your home page under New Quieter Blowers that you state, "We have reduced the noise level of our blowers by 10 dB which represents a 50% reduction in noise level." It actually represents a reduction to 0.1 the original noise power (a 90% decrease) or to 0.316 the original sound pressure level. I notice that Bill Pentz made the same error on his site ; it's one of the very few technical errors I've found in his work. The 10 dB reduction is very significant.
bababrown