Micro Perforated Plate

A micro perforated plate mpp is a device used to absorb sound reducing its intensity it consists of a thin flat plate made from one of several different materials with small holes punched in it.

Micro perforated plate.

Please refer to the technical data sheet tds for more information. ϕ o. Before the study of maa they were used only as protective layer for classical sound absorbers mpps are plates with small perforations whose diameter is in the order of 10 1 mm with low porosity values i e. Sorberscreen micro is a unique micro perforated metal sound absorber.

It eliminates the need for flow resistive textile backing as used on conventional perforated metal screen products. An mpp offers an alternative to traditional sound absorbers made from porous materials. Moreover photo etched media may not be available in the same sheet sizes aperture sizes densities and alloys as micro perforated plate. We also can make the design punch tooling suitable for many architectural metal and decorative metal uses.

0 06 thick x 0 1875 hole x 0 375 stagger stainless perforated sheet 316 round hole. Micro perforated sheet is available in a variety of thickness and hole shapes according to the applications and projects requirements we keep more than 150 sets mold to make sure match clients requirements. In the present work two types of mpp s have been investigated. Photo etched media offers strength uniform pore size a smooth finish.

Perforated steel sheet offers savings in weight passage of light liquid sound and air while providing a decorative or ornamental effect. Note the reduced hole cross section depicted in the photomicrograph. In this paper a model for the sound absorption coefficient of multi layered elastic micro perforated plates mpps in an impedance tube is developed using an analytical approach. I plates with circular holes and ii plates with slit shaped holes.

Perforated materials are used mostly as screens filters shields and guards perforated materials can control the passage of air liquid light solids heat electromagnetic waves and sound waves. Micro perforated plates mpps have been designated as high potential sound absorbers by maa for various applications including the ones with severe environments. Micro perforated plates mpp s can be subjected to both flow high temperatures as well as high sound levels and the effect of this on the mpp impedance must be known. Perforated steel sheet is a sheet product that has been punched with a wide variety of hole sizes and patterns providing an aesthetic appeal.

Perforated steel sheets are common in interior and exterior design.