The Acoustic Design of Soundproofing Doors and Windows

ABSTRACT

A model for manufacturing doors and windows which are capable of natural ventilating, reducing traffic noise and so on for the developing tropical countries is presented. These windows and doors combine two basic components which are ventilation unit and lighting unit. Due to the fact that the ventilation unit must have a large volume to attenuate low frequency noise, many resonance of higher-order mode wave will be generated inside the unit. In this work, a method to predict the insertion-loss of rectangular ventilation unit with input and output openings at various positions is proposed by solving the wave equation, considering the resonance frequencies of higher-order mode. The results of the analysis have been confirmed by experiments.