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).
RECEIVER SENSITIVITY / NOISE. RECEIVER SENSITIVITY. Sensitivity in a receiver is normally taken as the minimum input signa l (S min ) required to produce a specified output. signal having a specified signal-to-noise (S/N) ratio and is defined as the minimum signal-to-noise ratio times the mean. noise power, se e equation [1].