Amazon: Sound Proofing

[Derek UK]

Adam. I expect you can get the correct push through plugs to hold the front felt in but it's not an easy fix, especially if you thicken up the insulation. I was thinking about an alternate fixing if I used Hardura vinyl coated felt and wondered if the plastic ratchet fasteners that can be used to fix electric fans to radiators would work. Yes you would have to put them in from the engine side but a dab of dum-dum would seal and hold them in place after you'd got the holes in the felt positioned correctly. I think they are reusable so you'd be able to release them from inside.
Other ideas here but Halfords have a selection of trim buttons. Worth a look.
http://www.bresco.com/acatalog/Butto...e_Buttons.html

[Bristol603]

Originally Posted by swedishandgerman

I also read with particular interest your comment about under bonnet stuff. Do I read correctly that you have stuck on some high density sound deadening pads FOLLOWED by having stuck some felt

Yes, I put a sound deadening pad inside the bonnet (covering about 25% of the area) before putting the sound absorbing foam over the whole area. I don't know if this is correct, but my reasoning was that the bonnet is a big flat sheet of metal and the extra mass would help damp reasonance. It does sound more solid when you now shut the bonnet, but I don't have any measured data that would show that the sound deadening pad does anything other than add mass to the car.

[Burdekin]

Hi Nigel,

Good write up thanks. You should be able to get the sedan quieter than the estate due to the estate just being a large box and harder to isolate the sound. Insulating behind the rear seat and the boot will also be beneficial where as in the estate without the additional compartment behind the rear seat the noise can't be isolated so there's not the same gains for insulating the rear of the car. The wheel arch liners the guys are talking about in the other thread should help reduce road noise as well and fully insulating the doors also reduce other road noise entering the cabin but you then start adding a lot of extra mass and time to do the install. There will always be quite a bit of wind noise due to the gutters and mirrors etc but you've made it over double as quiet as it was previously going by your readings and quite often I think it's more noticeable to measure the difference with your own hearing and if you can talk in the cabin without having to raise your voice and listen comfortably to the radio then that makes the car much nicer to be in and travel longer distances in. My hearing isn't the best so keeping secondary noise to a minimum is pretty important to me so I can hear what people say when they are talking to me.

Cheers,

Mitch

[swedishandgerman]

Thanks Derek! I hadn't thought about using modern trim clips, but I can well see the advantages, especially beacause I have a few spare in my garage from a small job I had to do on my big V70

I ended up buying the standard black faced felt because I was concerned about how well the vinyl faced hardura would stay in place. I am going to improve on the standard mat by making it a bit wider a lower down into the floor pans

Thanks very much for your recommendations for doing the bonnet Nigel. I will definitely try it out

[Peterjohnbull]

Excellent post.

I too have paid Petersfield a visit and have some very shiny SY50 ALU stuck to the interior of my much quieter P1800S and a couple of sheets (largely unused so far) of F140 Duct foam.

I wish I had measured the sound before and after.

All I need to do is try and quiet the noisy quarterlights. They are really noisy.

REALLY noisy.

Pete

[asneddon]

Originally Posted by Gordon Hunter

I was interested to note the most noticeable improvement was under bonnet.
I have nothing on the bonnet on my 1800 but will certainly be doing this now.

I used the Brookhouse one in this thread:
http://www.volvoforums.org.uk/showthread.php?t=75024

I thought it worked out pretty well for the money to be honest.

Originally Posted by Peterjohnbull

All I need to do is try and quiet the noisy quarterlights. They are really noisy.

REALLY noisy.

Pete

I 100% agree with this. I've spent far too long trying to get mine quiet. If I push one of the corners with a thumb while driving they quieten down. Someone who knows what they are doing needs to do a write up of adjusting these to be quiet!

[Wulff]

A few snapshots of my sound proofing project:

First the under the bonnet project duly inspired by this tread and the possible impressive 6db reduction:

[Burdekin]

Wulff's pics. Very nice job and car collection you have!!!







I think what you did wrong was copy the address of the page rather than the pic address. Right click on the photo, go to properties and then copy the photo URL, then paste this URL in the link to attach photos.

[Wulff]

Mitch - Thanks for the kind words and the assistance with the pics. Well in photobucket I simply clicked in the link indicating what should be used for emails and messenger so not sure why it wouldn't work. Now I have even managed to find out how to post clickable icons - wohoo :-)

As to my collection I am certainly also very happy with it and thoroughly enjoy driving them. It's the only cars we have so they see a good use and my daughters love them. We had a VW Passat company car previously but the my daughters prefer the Amazon -obviously born with good taste :-)

[Wulff]

So here we go with the next batch from the interior: