M.A.D. — Bituminous membrane for acoustic isolation of low frequencies

M.A.D.® is a bituminous sheet armed with mineral charges, coated on its external faces by a high density polyethylene film. Acoustically it works as a plastic element between elements rigid, being an effective substitute for lead; between elements spring works as membrane resonator (typical absorber at low frequencies).
 
ADVANTAGES:
By adhering to galvanised steel sheets, it improves the resonance of the sheet.
By increasing the insulation at low frequencies, the air chambers used can be as small as possible.
By increasing the mass of lightweight walls, a higher acoustic performance is achieved.
It shifts the resonance frequencies of the rigid elements making the insulation higher.
Between insulators, it transforms acoustic energy into dynamics, improving insulation at low frequencies.
Easy to install by stapling to the surface or using M.A.D. Self-adhesive.
SCOPE:
It is used in industrial insulation as an anti-resonant material, providing acoustic mass to galvanised steel sheets.
It is used between rigid elements, such as gypsum plasterboard, to improve low-frequency insulation in both vertical and horizontal walls.
Used between spring elements to increase the overall isolation of the treatment, improving significantly at low frequencies.