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).
Pressure from the weight of a U.S. quarter lying flat: 133 Pa: 1 torr â 1 mmHg Â±200 Pa ~140 dB: Threshold of pain pressure level for sound. Prolonged exposure may lead to hearing loss. [citation needed] Â±300 Pa Â±0.043 psi: Lung air pressure difference moving the normal breaths of a person (only 0.3% of standard atmospheric pressure) 400â900 Pa: 0.06â0.13 psi: Atmospheric pressure on Mars, < 1% of atmospheric sea-level pressure on Earth