i think an atom bomb could go off down the block from peter and he wouldn't hear it over his exhaust.
Peter
I've heard the exhausts on your car - do you think the soundproofing will make a big difference?
Blissfully unaware of any tapping, knocking, squeaks or rattles, policewoman (person) not very happy though, I had to turn the engine off to hear her complain about the noise, she sort of believed me when I explained about the noise bouncing of the tall buildings in Southend-on-sea...

Either that or it was my dashing good looks

Once I'd removed the flying hat, face mask and goggles!
PaulJ
The sound proofing material seemed to reduce the temperature on the prop tunnel, although this was only tested via the touch method I couldn't find a grub screw to remove so I could insert my probe.