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).
(c) Impact or impulse noise shall be measured as dB(P) sound pressure levels with. sound level meters which have an impulse or peak hold circuit, a rise time. constant not exceeding 35 milliseconds, and the capability to measure peak sound. pressure levels of at least 140 dB(P).c) Impact or impulse noise shall be measured as dB(P) sound pressure levels with. sound level meters which have an impulse or peak hold circuit, a rise time. constant not exceeding 35 milliseconds, and the capability to measure peak sound. pressure levels of at least 140 dB(P).