Determining the sound level of a leaf blower

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SUMMARY

The sound level of a leaf blower is typically measured at a distance of 50 feet, with common ratings ranging from 70 to 75 dB. As sound intensity decreases with distance, doubling the distance from the source results in a reduction of sound power by approximately 6 dB. This information is corroborated by a source from the Quiet Communities organization, which indicates that the average leaf blower operates within this decibel range at the specified distance.

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  • Understanding of sound measurement units, specifically decibels (dB)
  • Knowledge of sound propagation and distance attenuation
  • Familiarity with product specifications and manufacturer claims
  • Basic acoustics principles related to outdoor equipment
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barryj
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Homework Statement
How does one determine the dB of a leaf blower.
Relevant Equations
db = 10log(p1/p2)
I have a leaf blower that states the sound level is 75dB. My question is, at what distance is this measured. It seems that as you get closer to the source, the dB number will increase drastically. If I double the distance from the source, then the power should go down by a factor of four or 6 db. Is this correct?
 
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You are correct. Can you post a link for the product?
If not stated, I would take it as the expected distance from the device to the operator's ears.

Update: found this
https://www.nonoise.org/quietnet/cqs/leafblow.htm
"The average blower measures 70-75 dB at 50 feet according to a manufacturer's lobbyist"
So maybe 50 feet is standard.
 

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