The range of 60-70 decibels sound pressure level is about as loud as normal conversation in 1 meter distance. The distance from the ears to the sound source is very important to the value of the SPL.
Scroll down to related links and look at "Table of Sound Pressure Levels".
Decibel Table - Comparison Chart - Table of Sound Levels and corresponding
Sound Pressure and Sound Intensity - Units and Quantities.
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