If you've ever seen a Jewish man with strings hanging out of his clothing, this is probably what you were seeing. There is no particular religious significance to the tallit (shawl) itself, other than the fact that it holds the tzitzit (fringes) on its corners.
Sound pressure or acoustic pressure is the local pressure deviation from the ambient (average, or equilibrium) atmospheric pressure, caused by a sound wave. In air, sound pressure can be measured using a microphone, and in water with a hydrophone. The SI unit of sound pressure is the pascal (Pa).
Talking with a normal voice approximate to a sound pressure level of 70 dB, a raised voice to 76 dB, a very loud voice to 82 dB and a shouting voice to 88 dB (1 ft distance). For every doubling of the distance from the noise source the sound pressure levels will be reduced by 6 decibels.