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A vacuum cleaner produces sound with a measured sound level of 64.0 dB. What is the pressure amplitude of the sound mPa?
Wiki User
∙ 15y ago
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) The "sound pressure amplitude" is 1.414 larger than the rms value of the sound pressure, that means 44.8 mPa. Amplitude means always the peak value. There is an easy to use calculator. Scroll down to related links and look at "Conversion of sound units (levels)".
Wiki User
∙ 15y ago
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