Analysis on Sound Reduction and Transmission Loss Using Compress Acoustic Chamber

Abstract

Noise pollution has increasingly affected public health due to its impact on productivity, hearing loss and overall quality of life. Acoustic insulation is an effective and practical solution to reduce unwanted noise in various environments. However, most acoustic chambers used to evaluate insulation performance are large, costly and require specialized facilities. Therefore, this study aimed to design, construct and validate a reduced size acoustic transmission chamber according to ISO 10140-5 guidelines. The chamber was used to measure sound insulation properties of commonly available materials such as polyester felt and expanded polystyrene (EPS) foam. Testing methods involved recording Sound Pressure Level (SPL), Sound Transmission Loss (STL) and transmission coefficient across frequencies from 100 Hz to 5000 Hz. The study concluded that scaled-down acoustic chambers can reliably evaluate acoustic materials and confirmed that thickness, density and internal material structure significantly influence sound insulation effectiveness.