The art of construction requires great attention not only to the legal requirements that mandate quality in buildings to protect persons, but also to the way people live in them, the pleasure that they take in enjoying living spaces in autonomy and freedom. One particularly important value is protecting the environment from irritating or excessive noise, and this is achieved by increasing the sound-absorbing power of the walls of living spaces. In this case, as others, there's little to invent: nature has always provided materials like Fiorditufo, which, due to its morphological characteristics, provides high levels of effective acoustic protection. In fact, in Fiorditufo the presence of cavities and air bubbles distributed in significant quantities inside a solid structure that is "deaf" because constructed of ashes, lapillus, pumice and similar materials, dampens sound waves with a sound-absorbing power of 55dB at 500hz in a thickness of 27 cm. This is a very important value if one takes into account that the noise pollution framework law, no. 447/1995 and the relative DPCM of 5 December 1997 on the determination of the passive requirements of buildings currently requires sound-absorbing power of not less than 50dB, and 55dB only for buildings used as hotels, guest houses, nursing homes, hospitals and the like. This latter is a value that one could also exceed with a simple layer of plaster on the referenced 27-cm wall. The sound-absorbing properties of Fiorditufo also achieve their beneficial effects when the blocks are used as wall-coverings, even though worked on their visible face, providing in such applications all-in-one performance: insulating, sound-absorbing, aesthetic and cost-effective qualities.