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Re: Sound proofing - future project
Posted: 11 Jan 2013 11:31
by Izak
Re: Sound proofing - future project
Posted: 11 Jan 2013 12:57
by ChristoSlang
Re: Sound proofing - future project
Posted: 11 Jan 2013 13:46
by Traveler
ricster wrote:

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

Hope I never hear that noise.
Re: Sound proofing - future project
Posted: 13 Jan 2013 16:30
by 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.

Re: Sound proofing - future project
Posted: 13 Jan 2013 16:34
by Traveler
Re: Sound proofing - future project
Posted: 14 Jan 2013 01:01
by Tinus lotz
lyk goed het jy n db meter om die verskil in pad geraas ens te meet?
Re: Sound proofing - future project
Posted: 14 Jan 2013 13:17
by 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.
Re: Sound proofing - future project
Posted: 14 Jan 2013 15:14
by 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
Re: Sound proofing - future project
Posted: 14 Jan 2013 16:28
by 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
Re: Sound proofing - future project
Posted: 14 Jan 2013 19:16
by Traveler
Thanks Grant.
I am surprised, I was expecting to use all 3 sheets. But only used one and a half.