Abstract
The result of activity 1 Acoustic element design studies. Assessment and analyzes of different possible design” in the subproject 5.2 is reported here. The main goal of the subproject 5.2 is to find possible acoustic solutions for effective use of passive thermal mass (ptm). The acoustic element design studies have been coordinated closely with the activities in subproject 5.1. “Room design and ventilation system design for efficient utilization of thermal mass in office buildings” This study has assessed the following types of absorbers as positive or possible positive: Retracted parts by formwork of concrete surfaces combined with different integrated sound absorbers, especially the micro perforated technology (from DeAmp or other possible producers) opens for a possible efficient system. The possible use of traditional absorbers in combination with 10 -20 % perforated metallic front panel in direct contact with metallic formwork should also be considered. Absorbers based on the micro perforated technology (from DeAmp or other possible producers) mounted beneath the concrete surfaces with good metallic contact to the concrete surface, the possible use of traditional absorbers in combination with 10 -20 % perforated metallic front panel in direct contact with the metallic frame should also be considered also for this type. Vertical sound absorber pads or baffles based on traditionally sound absorption materials On this basis we will start the process for prototype development of new solutions and element design in collaboration with manufacturer and contractors. Further, the plan is to make verification tests of prototypes of the acoustic properties at our laboratory.