The main objective of the CarAc’Terre project is to remove regulatory and normative obstacles to raw earth construction techniques relative to acoustics. A multi-scale methodology for characterizing the acoustic performance of raw earth construction systems is proposed using both a performance-based and a perceptual approach. A state-of-the-art review on earth-based walls and floors has been conducted as a means of proposing a large experimental design in response to the identified gaps. Measurements are planned at the material, wall as well as building scale, such that contributions from materials formulation, walls composition, system type, and the construction implementation can be investigated. This paper describes the general outline of the CarAc’Terre project and discusses the preliminary sound insulation results obtained on different types of walls. Measurements to determine material characteristics are described; these material characteristics are subsequently used as input data to numerical models. Comparison between predicted and measured acoustic performance, in terms of sound insulation, is also examined.