Soundproofing and sound blocking products such as Mass loaded Vinyl and other dense and heavy products that stop sound transmission from one area to another across a barrier belong to the SOUND BLOCK products group.

SOUND BLOCKING Product.  Sound Blocking Products are products that stop the sound from going through it.   Sound Blocking material reflect the sound, instead of absorbing it. The sound bounces off the soundblocking barrier kind of like a tennis ball bounces off a wall.  Sound Blocking materials do not reduce sound energy, but rather work as a barrier on the way of a sound wave.  This process is known as Sound Transmission Loss.  (STL) Sound blocking Products are used to stop sound from going from one room to another.  Sound Blocking material are usually solid, like brick, steel, concrete wall.
SoundBlocking efficiency of different materials is measured by using a single number coefficient, STC = Sound Transmission Class.  STC 33 means 33dB sound transmission loss.
Factors that affect Sound Blocking efficacy of a material:  Mass.

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This Antivibration Floor Mat with soundblocking layer, was specifically designed to economically protect recording equipment from structure-born noise and resonant vibration, as well as block…

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Mountable SoundBlocking Door panel. Color options - White or Black.  Door size options: 32 inch or 36 inch. This is the way to soundproof your…

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Add soundproofing to your walls.  No messy and expensive construction. Stop neighbor's complaints and let yourself play with these sound-blocking wall panels.  The Sound Block…

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The Window Noise Block Panel designed to block the most of traffic noise coming from a Window. The Window Noise Block Panel is made out…

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The industry's cost effective solution for stopping noise at its source. Adding limp mass barrier to soundporoof wall installation improves the soundblocking  efficiency of a…