Question

 A vacuum cleaner produces sound with a measured sound level of 64.0 dB. What is the pressure amplitude of the sound mPa?

Answer Sound level Lp = 64 dBSPL equals what sound pressure p (rms)?The sound pressure is: 0.0317 pascals (Pa) = 31.7 millipascals (mPa)The reference sound pressure is: p0 = 20 μPa = 2 · 10-5 Pa (0 dB)T... Read More »
http://wiki.answers.com/Q/A_vacuum_cleaner_produces_sound_with_a_measured_sound_level_o...

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http://www.wikihow.com/Make-a-Cats-Tail


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