Sound proofing - future project

[Izak]

steroid infused camel

[ChristoSlang]

Good reading material: http://www.sounddeadenershowdown.com/cgi-bin/index.cgi

[Traveler]

.... yeah screams like a banshee on a steroid infused camel over a dune

Hope I never hear that noise.

[Traveler]

The rear is basically done, all the way until below the mid row of passenger seats.

Also did the wheel wells.

Heated the material with a handheld gas torch. When slightly warm it conforms nicely to the intended curves in the body.

[Traveler]

If you heat it enough it can burn your hands properly.

[Tinus lotz]

lyk goed het jy n db meter om die verskil in pad geraas ens te meet?

[Traveler]

Ek het so 'n eenvoudige dB meter wat ons by die werk gebruik.
Ek het hom vanoggend getoets, 80km/h op dieselfde stuk pad as Vrydag. 'n 1,9dB verskil. Ek reken om nog 'n verdere verskil te kry moet ek byna die hele agterkant wat nog nie toegemaak is nie 'n laag gee.
Natuurlik het ek nog niks voor ingesit nie.

[AndriesS]

Good old dB being a logarithmic thing is a a bit of pain,
as example:
Perceptions of Increases in Decibel Level
Imperceptible Change 1dB
Barely Perceptible Change 3dB
Clearly Noticeable Change 5dB
About Twice as Loud 10dB
About Four Times as Loud 20dB

even a small amount of dB change won't be perceivable, and only 10dB feels twice as loud

What is interesting , at high intensities 85+dB, for every 2-3 dB the loudness increase , you nearly half the allowable time before you get permanent hearing loss
Hours per day / Sound level
8 85dBA
4 88dBA
2 90dBA

[Grant]

Heinrich,


Make the effort to do the front focusing on the gearbox area as well as the firewall. I have fitted similar sound proofing and heat rejection material, and it has made a huge differance. I have also spent time sealing all the holes on the wall that carried all the electrical cables. Well worth the effort.

Regards

[Traveler]

Thanks Grant.
I am surprised, I was expecting to use all 3 sheets. But only used one and a half.