Good sound proofing

Hi, I'm looking to sound proof the back of my 90 before I carpet it & put the headlining in, so was wondering what a good sound proofing material was.

I've been reading about and people say not to get stuff with bitumen in it as when heated it gives off a smell?!

Of course I'm not wanting to use top quality/expensive stuff as it would cost a fortune because there's so much area to cover.

So a budget would. Be around £65 for just the rear of the landrover. Would that be enough? And what's the best budget stuff to get?


Thanks

I bought EVA foam tiles (sometimes called fatigue tiles) off eBay, got two packs of 4 each for about 15 quid. I've lined the entire back with that and I feel it does make a big difference. Looks good too but there's nothing stopping you putting carpet on top of it.

the_wolf said:

I bought EVA foam tiles (sometimes called fatigue tiles) off eBay, got two packs of 4 each for about 15 quid. I've lined the entire back with that and I feel it does make a big difference. Looks good too but there's nothing stopping you putting carpet on top of it.

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That looks a good idea, I'm not sure if that stuff would work for the roof etc. But might use those for the floor, and then other stuff for the roof if i get some recommendations.

thanks for the info!

the_wolf said:

I bought EVA foam tiles (sometimes called fatigue tiles) off eBay, got two packs of 4 each for about 15 quid. I've lined the entire back with that and I feel it does make a big difference. Looks good too but there's nothing stopping you putting carpet on top of it.

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Did you stick them down?

Expandy foam and plywood,
never done it but sounds good

Yup, couple of cans of spray glue and they're stuck down very securely indeed. All that's left for me to do is put a piece of angle iron or similar along the edges of the wheel boxes to hide the joins and protect it a bit. I'll post up a photo later

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military grade ear defenders

Pictures would be ace! Theres a guy called Station House on here he used the silver backed stuff you put behind radiators and then just put a covering over that!

I used flashing tape on mine to try and soundproof it a bit. No idea if it made a difference lol I'm too used to the sound.

Pics as promised, my apologies for the quality.



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Hi folks first post here so be gentle!

I was going to wait until I'd picked up my Landy this weekend before posting but thought I'd weigh in on this one as in my professional capacity I'm a sound engineer

In order to have effective acoustic dampening you have to first remember that the sound you hear is made up of lots of different frequencies and reaches your ear either directly through holes or is amplified as structural borne vibrations

First thing to do is seal any holes (door seals, bulkhead and transmission tunnel) and then look at using layers of different materials to dampen the vibrations

Each frequency will move a given panel in a different way and each material is suited to a particular frequency range.

By solidly gluing heavy rubber matting to the metal work and then using a dense foam or thick felt followed by carpet you will achieve the best results

With this method you're working on low, mid and high frequency ranges simultaneously

Carpet as a top layer is really good at absorbing the high frequencies as they rattle round the cabin and makes it easier to understand speech whereas a hard surface on the top will make it worse

This has already been posted elsewhere on this site but they really do have the right idea

TOMAX CARS

Hope that helps
Dave

Hi that's some really good info there, especially the part about sticking it down well as I originally intended to just use carpet tape, but I'll have to use some proper spray adhesive now.

I'm still stuck for a real sound deadening product. I've been looking and have come across this: Car Sound Proofing Deadening Jute Felt Soundproofing.4 meter x 1.37 wide £42.00 | eBay

It seems to cover most of the basis, rubber then felt and carpet?
And isn't that expensive?

Also just found this: http://www.ebay.co.uk/itm/170871113672

Does either of those look okay?
Thanks

To be honest its not really worth spending an absolute fortune on sound proofing cos its still gonna be a noisy motherf*cker. I managed to acquire the acoustic matting that Exmoor trim makes (the expensive moulded rubber stuff) and in my opinion it doesn't make a great deal of difference and even if I had the cash sitting spare I wouldn't pay 400 quid for it.

What would be good though, whilst we're on the subject and my apologies for hijacking the thread a little, but what's peoples best ideas for soundproofing from engine noise? I would do a search but I'm on my phone and it won't let me :s

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try this, ive got b&q roof flashing or wickes, it sticks like sh_t, sticks better when its warm weather, its the stuff that looks like lead £15.00 a roll 3 x rolls did all the back, now im doing starting the front
hope this helps

I used that on the footwells, gearbox tunnel and roof panels, definitely does reduce vibration thereby reducing sound a bit. Screwfix is cheaper for it though

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maxw said:

Hi that's some really good info there, especially the part about sticking it down well as I originally intended to just use carpet tape, but I'll have to use some proper spray adhesive now.

I'm still stuck for a real sound deadening product. I've been looking and have come across this: Car Sound Proofing Deadening Jute Felt Soundproofing.4 meter x 1.37 wide £42.00 | eBay

It seems to cover most of the basis, rubber then felt and carpet?
And isn't that expensive?

Also just found this: Silent Coat Noise Isolator 8 Bulk Car Sound Proofing | eBay

Does either of those look okay?
Thanks

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the_wolf said:

To be honest its not really worth spending an absolute fortune on sound proofing cos its still gonna be a noisy motherf*cker. I managed to acquire the acoustic matting that Exmoor trim makes (the expensive moulded rubber stuff) and in my opinion it doesn't make a great deal of difference and even if I had the cash sitting spare I wouldn't pay 400 quid for it.

What would be good though, whilst we're on the subject and my apologies for hijacking the thread a little, but what's peoples best ideas for soundproofing from engine noise? I would do a search but I'm on my phone and it won't let me :s

Sent from my electronic brick

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It's not a cheap solution by any means but it is the correct way to maximise the acoustic dampening. Just resting the rubber matting on top will dampen some of the vibrations but not all.

What you're looking to do is transfer the energy from the vibrating surface into the rubber matting as it is more compliant and will take the energy out of the vibrations. The best way to do this is to firmly glue it down otherwise you'll break the larger panel into smaller areas

There's a mathematical relationship between the size of the area, the flexibility of the material and the frequency radiated.

Take a large area and break it down into smaller areas and you raise the pitch of the sound being transmitted. A very similar thing happens when you move your finger up and down a guitar string

So you might help tame some of the lower exhaust notes but some of the mid range will get through and the more those frequencies venture into the 1Khz to 4Khz range the more sensitive our hearing becomes and the harder it is to understand the person talking next to us

Also by removing some frequencies your awareness of what is left will be increased

By gluing the mats down properly you really do dampen the entire panel

By then adding a layer of felt (and yes maxw I'd go for the Jute felt as it will mold to the contours better) and you further dampen the sound

As I said the trick is a multi-layer, multi-density approach. There's no product out there that will do the job on it's own but if you're on a budget density is your friend and that roof flashing stuff can also work wonders

Lastly I cannot stress the importance of sealing holes enough

A joke for Landy owners I know but it's no coincidence that modern cars have double seals on the doors it really does make a massive difference to road noise

If there's a hole, sound will get through it no matter how small it is

Check out these guys:
Soundproofing, sound proofing, soundproof and sound proof | soundservice.co.uk

They have a seconds section... call in if you're in the area, and they will help you out... I got a load of good quality soundproofing - foam matting, and 'deadsheet' to go underneath... stuck it everywhere... makes a big difference.

Now considering one of those lead blankets to reduce the engine noise coming through the front vents/screen - anyone tried one of these?

The Gribbin said:

Check out these guys:
Soundproofing, sound proofing, soundproof and sound proof | soundservice.co.uk

They have a seconds section... call in if you're in the area, and they will help you out... I got a load of good quality soundproofing - foam matting, and 'deadsheet' to go underneath... stuck it everywhere... makes a big difference.

Now considering one of those lead blankets to reduce the engine noise coming through the front vents/screen - anyone tried one of these?

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I was gonna buy one of the Noisekiller engine blankets, I think they're the same as what you said. If I do ill let you know how effective it is.

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Gggrrrrrrrrr!

The Mad Hat Man said:

Gggrrrrrrrrr!

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Time of the month?

ive used rolls of closed cell foam mats stuck down with good spray glue (the type that looks like its been shot out of spidermans wrist) to good effect in my vtec mini. closed cell foam is the posh name for those thin foam mats you get for camping, £shop all the way, you could probably do a stretch hummer and get change out of £30.