A clean room is a sterile or controlled environment, free from, or with a low level of, dust and other airborne contaminants. Human beings are typically the largest single source of contamination in a clean room, so workers must follow special procedures on entry and exit, and wear special apparel to trap human hair, human skin flakes, pollen, mould, etc.
A clean room also presents challenges in communicating with the outside world, but a device known as a melaphone is specifically designed to facilitate the mutual exchange of information between the interior and exterior of a clean room, without compromising the sterility of the area. Essentially, a melaphone consists of a circular, transparent diaphragm, made of a tough, versatile plastic called polycarbonate and reinforced with a stainless-steel mesh. The transparent diaphragm transmits sound freely and clearly, without the need for a loudspeaker and/or power supply but, because air does not flow through it, it cannot transmit airborne contaminants.
Diaphragms are available in diameters large and small, which can easily be accommodated in a range of clean room settings. Even in smaller diameters, they offer a high degree of vision, so that workers outside a clean room can see those inside, and vice versa, and work safely.
See our Melaphone products being tested to ISO 14644-1 and achieving ISO Class 5 level (use the next and previous icons to navigate playlist after clicking play).