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Old 14th April 2013, 00:15   #16
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Smile Re: DIY: Damping a Figo with Wurth & Yoga Mats

Brilliant! Good to see someone take this up as DIY.
How far did the yoga mats contribute? Was this primarily done to reduce road/engine noise or to reduce vibrations due to the door mounted speakers?

on a neat job done.. and thanks for sharing the idea on conserving the materials used by mocking up with newspapers.

Cheers!
Sam
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Old 14th April 2013, 19:47   #17
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Default Re: DIY: Damping a Figo with Wurth & Yoga Mats

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Originally Posted by samarth.bhatia View Post
Brilliant! Good to see someone take this up as DIY.
How far did the yoga mats contribute? Was this primarily done to reduce road/engine noise or to reduce vibrations due to the door mounted speakers?

on a neat job done.. and thanks for sharing the idea on conserving the materials used by mocking up with newspapers.

Cheers!
Sam
Hey thanks samarth. The goal was to reduce road noise primarily. For that purpose I have used the Wuerth mats. The yoga mats are stuck to avoid any future rattles in the door pads. If you read through the reply by DerAlte & my reply to that, you can understand the todo for reducing vibrations with door mounted speakers.
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Old 15th April 2013, 11:29   #18
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Default Re: DIY: Damping a Figo with Wurth & Yoga Mats

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... Was this primarily done to reduce road/engine noise or to reduce vibrations due to the door mounted speakers? ...
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Originally Posted by swami.n View Post
... The goal was to reduce road noise primarily. For that purpose I have used the Wuerth mats. ...
The only vibrations the door mounted speakers produce are classified as music!

@swamigal's stated objective was "to try and reduce the road noise and not damping", and there seemed to be a bit of a misunderstanding there. Damping IS what reduces the road noise.

'Road noise' (not the one that comes in through the windows) is noise induced in/through the outer and inner metal layer of a door. The noise comes up through the suspension to the chassis to the body and doors. This is also complicated by the fact that large areas of metal sheet tend to resonate - which is like amplifying the road noise at certain low frequencies.

These frequencies, as do the general range of frequencies of road noise, overlap with the lower mid-bass content coming out of the speakers. When listening to music, the brain tends to filter out the regions that don't sound musical, with the result that the bass response of the speakers sound lacking and you don't hear a significant part of the music.

Proper damping (adding mass using a heavy material stuck uniformly on the surface; this is what absorbs the noise energy - ergo damping) to reduce that noise is applying good damping material (not yoga mat) to the metal layers of the door. NOT closing large holes - that DOESN'T stop sound and doesn't damp ANYTHING.
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Old 16th April 2013, 02:01   #19
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Default Re: DIY: Damping a Figo with Wurth & Yoga Mats

The "mat" material applied here will help, but you need more "mass" in the doors (and boot / trunk if you want). There are official soundproofing materials - "Soundmat" is one but it is expensive. This can be done more cheaply.

Here in the UK we have roofing flashing - a kind of self-adhesive tape material used to weatherproof roofs. It comes in various widths from 50mm to 300mm and various lengths from 5m to 30m. You may have the same nearby in hardware or DIY shops. It looks like this


Once you have stripped your car you apply this to the larger panels - the door skins, the floor (including the book / trunk). 2 300mmx15m rolls are enough to do a 4 door car including the floor and boot.

You have to be careful to leave drain holes free but this adds mass to those panels and stops vibration and "boom" making the car feel a lot quieter.



The downside is a slight "tar" smell for a few days but once dried the smell goes away.
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Old 16th April 2013, 12:02   #20
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Default Re: DIY: Damping a Figo with Wurth & Yoga Mats

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... Here in the UK we have roofing flashing - a kind of self-adhesive tape material used to weatherproof roofs. It comes in various widths from 50mm to 300mm and various lengths from 5m to 30m. You may have the same nearby in hardware or DIY shops. ...
"Tar felt". What you get there is the modern equivalent of good old tar felt - tar stabilized with mica, and laid onto jute fabric to form a sheet. It is available in India in the original form that needed molten tar to be laid on first before laying on the tar-felt. Not sure, but the modern self-adhesive form may also be available here. It works well on wooden roofs (not may of those in India), but the tar-bonded version works better on concrete roofs in India.

Usually OE damping is the same material laid on the metal panels, just before painting, to reduce NVH. This is more suitable during manufacturing, but for DIY work the more flexible conventional damping material works better.
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Old 17th April 2013, 17:42   #21
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Default Re: DIY: Damping a Figo with Wurth & Yoga Mats

Swami, wonderful work by you tempting to do this for my car as well. Where did you buy these items in Chennai. I stay near to T Nagar. Saw Yoga mats at Jayachandran/ Saravanas at 360/- per piece.

Does the door pads come out easily by pulling after removing its screws.
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Old 18th April 2013, 19:57   #22
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Default Re: DIY: Damping a Figo with Wurth & Yoga Mats

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Swami, wonderful work by you tempting to do this for my car as well. Where did you buy these items in Chennai. I stay near to T Nagar. Saw Yoga mats at Jayachandran/ Saravanas at 360/- per piece.

Does the door pads come out easily by pulling after removing its screws.
I stay in virugambakkam, so got it from Big Bazaar. Yes the pads are pretty easy to remove.

go ahead and do it. All it takes is a few hours and after that you'll be very tired and at the same time very satisfied.
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