Sound Deadening / Deadener Tips

**jhnkvn** · August 19th, 2014 03:28 AM

Originally Posted by threadstone

Pag nagpa-deadening po ba kailangan "double walling" to achieve the best result? Pag ganun it will consume at least 4 sheets per door.
Me nakita kasi ako, yung nilagyan ng deadener eh yung outer wall lang ng pinto.
Me pics kasi dito sa thread, ang me deadening is yung side na me mga wirings.
Ano po ang tama?

Sent from my iPod

It won't really consume 4 sheets per door unless you're talking about Expedition-sized cars. Usually one sheet inside and another outside or a total of 2 sheets/door.

If you need to choice between the two, deaden the outer wall which has more surface area and where speaker back-waves bounce at.

Originally Posted by monty_GTV

mga paps, may nakasubok na ba ng butyl based na Car Builders-Sound Deadener from Aus? may fs sa KAC 10 sheets for 2k. comparable kaya sa mga stp, dynamat and other dampening sheets. TIA

Should be comparable. You don't really need branded deadeners. Sure, there are "grades" when it comes to rubber butyl but performance is inherently physics-based. The reason for deadening is just to add mass. The heavier.. the better because it lowers the resonant frequency of the panel (which is the main reason of deadening)

So is it comparable? Yes.

**monty_GTV** · August 19th, 2014 05:16 AM

Originally Posted by jhnkvn

Should be comparable. You don't really need branded deadeners. Sure, there are "grades" when it comes to rubber butyl but performance is inherently physics-based. The reason for deadening is just to add mass. The heavier.. the better because it lowers the resonant frequency of the panel (which is the main reason of deadening)

So is it comparable? Yes.

thanks a lot sir kevin

**D3nb3r** · September 5th, 2014 03:11 AM

yung Acoustipad po ni Jeff Tan *P300/sheet is butyl po ba or asphalt?.
Nag pm kasi ako sa kanya and asked for an OEM butyl or stp price and yun ang reply nya.

**atog** · September 5th, 2014 01:15 PM

mga sir expert..tanung ko lang pwede ba sa engine cover yan sound deadening mat..balak ko sana ilagay sa engine hatch cover nga grandia..maingay at medyo mainit kasi yun seat..thanks po..

**MonteroGLSV** · September 5th, 2014 06:08 PM

Sir ano po pinakamagandang klase ng deadening? Thanks po kahit pricey cya basta sulit at hindi nagmemelt pag mainit

Originally Posted by D3nb3r

yung Acoustipad po ni Jeff Tan *P300/sheet is butyl po ba or asphalt?.
Nag pm kasi ako sa kanya and asked for an OEM butyl or stp price and yun ang reply nya.

**jhnkvn** · September 5th, 2014 06:26 PM

Ganito kasi yan,

Sound deadening, although contrary to its name, has the main purpose of lowering the resonant frequency of a panel by adding mass so that it vibrates at a lower frequency hence less annoying to our ears. For example, a bee buzzing by your ear is extremely annoying while a grinding cement truck isn't. It's primarily used in car audio applications.

If you plan on lowering the noise inside your cabin.. you need to do more than just deadening. Deadening helps.. but it's quite inefficient as a sound barrier. This is why the NVH insulation of car manufacturers like Lexus is legendary. This is because they engineer the car from ground up to plug as many leaks as possible - so what you get is a cocoon inside that shields noise coming from outside. In a practical sense, let's say meron ka space na meron sliding windows - the easiest way on how to block sound is to slide the window to create a "bubble" by plugging in air leaks (because noise travels by air).

Can you use this on your engine/cabin firewall to reduce the amount of engine noise? Yes. How? Just plug as many air leaks you see. Still, this is inefficient.

**attorney** · September 6th, 2014 01:45 AM

Has anyone installed these at the engine bay of super grandias? Sobra ingay when in expressways..

**MonteroGLSV** · September 6th, 2014 05:50 AM

Thanks sir jhnkvn your the best. actually i have put some soundproof concept stuffit and noticeable quieter at the high speed however engine noise still there

Originally Posted by jhnkvn

Ganito kasi yan,

Sound deadening, although contrary to its name, has the main purpose of lowering the resonant frequency of a panel by adding mass so that it vibrates at a lower frequency hence less annoying to our ears. For example, a bee buzzing by your ear is extremely annoying while a grinding cement truck isn't. It's primarily used in car audio applications.

If you plan on lowering the noise inside your cabin.. you need to do more than just deadening. Deadening helps.. but it's quite inefficient as a sound barrier. This is why the NVH insulation of car manufacturers like Lexus is legendary. This is because they engineer the car from ground up to plug as many leaks as possible - so what you get is a cocoon inside that shields noise coming from outside. In a practical sense, let's say meron ka space na meron sliding windows - the easiest way on how to block sound is to slide the window to create a "bubble" by plugging in air leaks (because noise travels by air).

Can you use this on your engine/cabin firewall to reduce the amount of engine noise? Yes. How? Just plug as many air leaks you see. Still, this is inefficient.