This study examines the airborne sound insulation properties of various lightweight acoustical materials and masonry constructions, tested in reverberation chambers for use in ceilings, doors, partition walls, noise barriers, and enclosures for traffic, domestic, and machinery noise control. It offers an extensive database of sound transmission loss characteristics measured across the frequency range of 100 Hz to 5 kHz, a resource that is seldom available in existing literature. Additionally, the study outlines the measurement methodology for sound transmission loss, which is widely used in building acoustics. By providing a comprehensive database, this study supports the application of different acoustical materials for noise mitigation and control. It also aids in the design and development of sandwich constructions that offer enhanced sound insulation across the entire frequency range.