Micro Perforated Plate

It eliminates the need for flow resistive textile backing as used on conventional perforated metal screen products.

Micro perforated plate.

Micro perforated plates mpps have been designated as high potential sound absorbers by maa for various applications including the ones with severe environments. Sorberscreen micro is a unique micro perforated metal sound absorber. 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. In the present work two types of mpp s have been investigated.

ϕ o. Under the plane wave condition a low frequency solution is derived by including the symmetric modes of the plate vibration and the sound pressure field. An mpp offers an alternative to traditional sound absorbers made from porous materials. 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.

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. We also can make the design punch tooling suitable for many architectural metal and decorative metal uses. 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 sheets are common in interior and exterior design.

However it may be a very costly solution. Note the reduced hole cross section depicted in the photomicrograph. Photo etched media offers strength uniform pore size a smooth finish. 0 06 thick x 0 1875 hole x 0 375 stagger stainless perforated sheet 316 round hole.

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. Perforated steel sheet is a sheet product that has been punched with a wide variety of hole sizes and patterns providing an aesthetic appeal. Please refer to the technical data sheet tds for more information. I plates with circular holes and ii plates with slit shaped holes.

Micro mesh offers a wide range of perforated metal sheets punched in mild steel galvanised aluminium stainless steel and special alloys.