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).
The diesel particulate filter pressure sensor is an input to CM and measures pressure before DPF. The sensor is a differential type sensor that is referenced to atmospheric pressure and is located in exhaust system downstream of DPF. At key On, engine Off, the DPF pressure sensor pressure value reads 0 psi. (0 kPa). The range of the sensor is 0 to 11.6 psi (0 to 80 kPa).