Orthotics can help remedy this situation by: 1  Providing a stable base for movement. 2  Establishing an efficient gait. 3  Minimizing the effects of spasticity in limbs.  Creating an environment in which a child can take repeatable 1  steps. Reducing excessive energy used to move.  Aiding the transition between sitting and standing.
USG Research conducted the tests with a. variety of partition designs. The results: Thermaï¬ ber mineral wool. insulation in the 2.5 to 3.0 lbs/cu.ft. density range proved the best. overall acoustical performance. Densities above the 3 lbs/cu.ft. provided improved sound attenuation at high frequencies, but the. low-frequency performance starts to suffer at higher densities.
The R-values of plastic fiber insulation vary with the battâs density, ranging from R-3.8 per inch at 1.0 lb/ft3 density to R-4.3 per inch at 3.0 lb/ft3 density. Plastic fiber insulation is relatively non-irritating to work with, but the batts reportedly can be difficult to handle and cut with standard tools.