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Other Soundproofing

Recording Studios

Home Theater



Retrofit Walls

A Constrained Layer Damping Technique

The natural process of sound vibration creates friction and unwanted energy build-up through the bending and slipping of adjacent surfaces. WallDamp is a thin sheet of material designed as a damping interface between joined surfaces undergoing vibration. As a result, when it's placed between the bordering surfaces there is maximum damping action on vibration. WallDamp uses an energy absorbing polymer to convert the sliding action into a shear stress whose energy is rapidly dissipated. This increases the sound isolation, reduces wall /stud resonance, and dampens tympanic wall thunder. For advanced sound and vibration control projects, nothing works better than our Iso-Wall constrained layer damping system.


Undamped vs. damped vibrations
Undamped (left) vs. damped vibrations


Undamped Vibrations - Vibrational energy is stored for a long period of time and can be retransmitted through other mechanisms. Example: an undamped room wall can vibrate perceptibly for more than one second when excited by sudden sonic impacts. This vibration then becomes a secondary source of sound emitted back into the room, creating a source of unwanted lingering noise. This is highly contrary to the desired acoustics of a well-developed sound room.


Damped Vibrations - Vibrational energy is removed quickly, usually through frictional losses, and is no longer available to be transmitted. Example: a damped room wall will vibrate for an imperceptible length of time after being excited by sudden sonic impacts. This means that there is no secondary radiation of unwanted noise. This is the desirable situation for preferred sound room acoustics.


The Iso-Wall system is being offered as an integrated package -complete with pre-damped resilient channels, damping gasket, bearing felt and acoustical sealant.


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