Current acoustic prediction standards, notably ISO 12354-1 and DIN 4109-32 and previous literature demonstrate significant technical limitations when applied to Autoclaved Aerated Concrete (AAC) systems. These frameworks, originally developed for traditional masonry or lightweight panels, fail to account for the specific microstructure and unique vibroacoustic response of AAC, leading to systematic inaccuracies, highlighting the need for new predictive formulations. To address this gap, this study analyses a comprehensive dataset of more than 100 laboratory tests. The work presents a significant innovation by moving beyond generic empirical formulas to introduce a unique formulas specifically tailored for AAC single walls ( R w =29.0lg( m ′)–15.5) and double walls ( R w =6.0lg( m ' 1 + m ' 2 )+42.5 for mortar joints and R w =14.7lg( m ' 1 + m ' 2 )+32.1 for polyurethane foam joints). For walls with metal stud lining systems, ISO 12354 1 systematically underestimated performance. New correction coefficients were derived to accurately capture the resonance and stiffness contributions of lining–cavity systems. A further coefficient was proposed for configurations with direct bonded layers. A distinctive value of this research is the rigorous separation and quantification of perimeter sealing methods; findings demonstrate that replacing rigid mortar joints with elastic polyurethane foam can enhance by approximately 9 dB, a critical construction detail currently overlooked by mainstream standards. Furthermore, the study employs inverse acoustic analysis to derive the dynamic elastic modulus and internal loss factor of AAC, providing the necessary parameters for high-fidelity simulations. This research offers designers a validated, robust methodology to ensure acoustic regulatory compliance and optimize indoor environmental quality in AAC-based buildings.
Granzotto et al. (Mon,) studied this question.