The present invention relates to adsorption membranes comprising microporous polymer membranes in which adsorbent particles are incorporated. The face flange portion becomes plastered in place in a wall or ceiling with the duct portion supporting the light source and associated components. Once the sheet material is clamped, the distance between the nose and the die is controlled during the riveting operation by a restraint device. The power consumption in a component of the communication link may be adjusted based on the classification of the measured noise.