  Noise pollution remains a challenging problem requiring the development of
novel systems for noise insulation. Extensive work in the field of acoustic
metamaterials has led to occurrence of various ventilated structures which,
however, are usually demonstrated for rather narrow regions of the audible
spectrum. In this work, we further extend the idea of metamaterial-based
systems developing a concept of a metahouse chamber representing a ventilated
structure for broadband noise insulation. Broad stop bands originate from
strong coupling between pairs of Helmholtz resonators constituting the
structure. We demonstrate numerically and experimentally the averaged
transmission -18 dB within the spectral range from 1500 to 16500 Hz. The
sparseness of the structure together with the possibility to use optically
transparent materials suggest that the chamber may be also characterized by
partial optical transparency depending on the mutual position of structural
elements. The obtained results are promising for development of novel
noise-insulating structures advancing urban science.
