Insulation can be considered to be a "protective" procedure in the sense that what is protect in "Process temperature" we have established the fact that specific temperature ,within very small tolerance, are necessary element of a successful process. There are long runs of piping, large vessels, etc. that must maintain specified process temperatures to make the process work.
Soundproofing is any means of reducing the intensity of sound with respect to a specified source and receptor. There are several basic approaches to reducing sound,increasing the distance between source and receiver, using noise barriers to block or absorb the energy of the sound waves, using damping structures such as sound baffles.
Heated and cooled air escapes through unsealed duct joints and holes, increasing the house's energy costs. unconditioned air can also infiltrate into ducts through unsealed points with the consequent increasing of energy bills. If your duct system is poorly sealed and insulated, sealing and improving its insulation can reduce your heating and cooling costs.
Ceiling (and roof) insulation is critical in most buildings and climates. Even if insulation involves lifting the roof, it may be a deserving task and investment. The benefits are immense. Ceiling-roof insulation is a crucial piece of the house insulation - something that in some more extreme cases may avoid 50% of the home's heating and cooling energy losses.