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It depends how close your ears are to the lawnmower.

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According to the chart at the link provided below an average lawnmower puts out about 107 decibels at a three foot distance.
A lawn mower at 3 ft distance can have a sound pressure level of L = 100 dBSPL. Never forget to tell the distance of the measuring microphone from the sound source, because the closer you are the louder it is. The sound pressure level decreases by 6 dB per doubling of distance from the source to 1/2 (50 %) of the sound pressure initial value. The sound pressure decreases inversely as the distance increases with 1/r from the sound source.

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9y ago

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