BestCarAudio.com

Showcasing the Best in the Mobile Enhancement Industry

Showcasing the Best in the Mobile Enhancement Industry
  • Articles
    • Bluetooth
    • Car Audio
    • Motorcycle Audio
    • Navigation
    • Remote Starter
    • Satellite Radio
    • Smartphone Integration
    • Vehicle Insights
  • Industry Profiles
    • Installation Profiles
    • Installer Profiles
    • Retailer Profiles
    • Vendor Profiles
  • Products
  • Dealer Locator
  • Contact
  • Facebook
  • Twitter
  • Instagram
Arc Audio

Sound Deadening Technology and Terminology

May 27, 2020 By 1sixty8

Deadening Terminology

There’s no denying that sound deadening is one of the easiest ways to enhance the comfort of your vehicle and improve the performance of your car audio system. Many kinds of deadening have been available over the years. Let’s take a close look at some of the most common technologies and explain the terminology used to define the different sound deadening solutions.

What Are Constrained Layer Dampers?

The most popular sound deadening materials fall into the class of constrained layer dampers (CLD). In most designs, CLD deadening materials are made from a sandwich of a dense and flexible base layer that is bonded to a sheet of thin aluminum. The base layer, in most cases, is made of butyl rubber. Butyl is a synthetic rubber with very low stiffness, so it can bend and mold to the contours of the surfaces it is adhered to. The aluminum layer gives the material a structural component, allowing it to span openings in door panels without sagging.

CLD materials add mass to the objects they’re attached to and reduce their ability to vibrate. The concept is similar to how a heavier piano or guitar string resonates at a lower frequency than one that is very thin and light. Imagine how a bass guitar would sound if you wrapped the E string of a guitar in dense rubber? From a technical perspective, the damping material converts the energy from the sound vibrations into heat, though this happens on a microscopic level.

Once damping material has been added to a large, flat surface like a door panel, a rear fender, the trunk lid or the roof of a car or truck, it’s harder for sound energy outside the vehicle to make that panel vibrate. If the panel doesn’t vibrate as much, less sound will be transferred into the vehicle, and the interior will be quieter.

Deadening Terminology
CLD sound deadening comes in all shapes and sizes. Resonix offers squares and rectangles to suit different installation needs.

What Are Noise Decoupling Solutions?

The second popular type of sound control product is decoupling materials. In most cases, these are closed-cell foams with a strong adhesive. When applied between the chassis and trim panels, or anywhere that two surfaces contact each other, the foam will help prevent annoying buzzes and rattles.

It’s important to remember when choosing a decoupling foam to make sure that it’s a closed-cell design. You don’t want it to absorb or trap moisture in any way. Trapped moisture can lead to mold, corrosion and damage to the vehicle.

Deadening Terminology
Companies like SoundShield combine CLD with a foam decoupling layer in a single product. Elevated Audio used this all-in-one sound deadening to improve the comfort of this Honda.

What Are Sound Barriers?

The third and least popular of the sound deadening materials are sound barriers. These products work independently of the vehicle chassis and panels as opposed to being bonded directly to them to reduce noise. Sound barriers typically feature a dense lead or vinyl core that is suspended between two layers of foam. The foam isolates the dense core from the vehicle and allows it to absorb energy in the form of noise. Sound barriers are also good at blocking heat transfer into a vehicle. Many hot rod builders will cover the transmission tunnel where the exhaust runs with a sound barrier to help keep the interior of the vehicle cooler.

Deadening Terminology
Burchett Customs in Knoxville, Tennessee, treated the floor of this C2 to a layer of Dynamat Xtreme CLD and Dynapad sound barrier material.

When we mentioned that sound barriers are the least popular, that isn’t because they don’t work well or offer significant benefits. They are fantastic and can dramatically improve the comfort of your vehicle. Because they’re usually installed on the floor of a vehicle, their installation requires that the carpet be removed from your car or truck. This is a time-consuming process as the seats, center console, trim panels and the lower part of the dash need to be removed. If you’re after the quietest and most luxurious driving experience, it’s a worthwhile investment. If you are having a vehicle interior built from scratch, you may want to consider this as part of the upgrade.

Deadening Terminology
Musicar Northwest in Portland, Oregon, treated this 2017 Tesla Model S to a layer of CLD in the doors to help reduce noise transfer into the vehicle and improve the performance of the Dynaudio speakers they installed.

What To Look for When Shopping for Sound Deadening

There are a few things to take into consideration when you’re shopping for deadening materials. The absolute most important criteria are the adhesion properties of the CLD you choose. There have been hundreds of cases where low-quality products have fallen off of door panels and roofs. In some cases, the deadening has melted completely and turned into a tar-like sludge. The results can be incredibly expensive to repair, and upholstery and carpet can be permanently stained by the sticky, goopy mess. Likewise, deadening that falls into the window mechanism in a door car leads to damage.

One tip: If the CLD has a strong odor, you may want to avoid it. Many damping materials that contain bitumen smell bad and have problems staying in place when they get hot in the summer.

Finally, you want to make sure the material you purchase is fire retardant. The last thing you need is your car going up in flames because a spark or heat from a short circuit sets your sound deadening on fire. Get a small sample of the deadening material and try to ignite it with a lighter. It might smolder for a second then go out. Self-extinguishing is the key here.

Understanding Sound Deadening Terminology Makes Shopping Easier

With a basic understanding of how sound deadening technologies work and a grasp of the common terminologies used in the car audio industry, you can now shop for a solution. Dozens of companies offer sound deadening, which comes in different thicknesses and densities. We’ll leave you to work with your local specialty mobile enhancement retailer to choose a product that works for your application.

Share this:

  • Tweet
  • Email

Related

Filed Under: ARTICLES, Car Audio, Resource Library Tagged With: Resonix Sound Solutions, Sound Barriers, Sound Damping, Sound Deadener, Sound Deadening, SoundShield

About 1sixty8

1sixty8 media is a content marketing, website development, and business solutions provider specializing in the mobile enhancement industry. The 1sixty8 media team includes many household names in the industry, from store owners and industry writers to award-winning installers and fabricators. To learn more about 1sixty8 media, visit www.1sixty8.com.

Audison Forza
Helix

Industry Profiles

Westminster Speed and Sound

Mobile Enhancement Industry Profile: Westminster Speed and Sound

April 9, 2021 By 1sixty8 

Located in Carroll County, Westminster Speed and Sound has been a staple in the car audio and aftermarket accessory … [Read More...]

Press Releases

Vision Zero Automotive Network
ADAS (Advanced Driver Assistance Systems) Certification Program launched by Vision Zero Automotive Network
Metra 107-GM5B
Metra Electronics® Ships New Dash Kit with Built-in OLED Screen for 2010-2012 Cadillac SRX
Prime R2 Loaded Enclosures
Rockford Fosgate® Releases New Prime R2 Loaded Enclosures
Motorsports Can Speakers
Rockford Fosgate® Begins Shipping New Motorsports Can Speakers
Rockford M5 Amplifiers
Rockford Fosgate® Begins Shipping New M5 Amplifiers

Product Reviews

Sony XM-GS6DSP

Sony XM-GS6DSP Amplifier Product Review

Vehicle Insights

2021 Toyota Sienna

2021 Toyota Sienna Limited: Maximum Minivan

2021 Mazda CX-5

2021 Mazda CX-5 Signature. Don’t Overlook the Zoom-Zoom.

Find Facility Near You

Subscribe to BestCarAudio via Email

Enter your email address to subscribe to BestCarAudio.com and receive notifications of new posts by email.

Popular Categories

  • Car Audio
  • Window Tint
  • Remote Car Starters
  • Vehicle Insights
  • Radar Detectors

Supporting Manufacturers

  • Arc Audio
  • Compustar
  • Hertz
  • Momento
  • MSC America
  • Rockford Fosgate
  • Sony
  • SoundShield

Contact

  • Editorial
  • General
  • Advertise

Forms

  • Profile Request

Sign up for our newsletter today. Opt out at any time with 1 click.

  • This field is for validation purposes and should be left unchanged.

BestCarAudio.com is a product of 1sixty8 media · Copyright © 2021 1sixty8 media · Privacy Policy · Website by 1sixty8 media · Log in

loading Cancel
Post was not sent - check your email addresses!
Email check failed, please try again
Sorry, your blog cannot share posts by email.