Stealth Acoustic Materials

This is the authors' abstract. We don't add key points for this paper.

This work establishes a fruitful connection between the fields of ``stealth materials'' in soft matter and acoustics, pushing the field of stealth materials in a more general direction, based on the principles of wave physics. The positions of scatterers in an air-filled acoustic waveguide are chosen such that, in the Born approximation, suppression of scattering over a broad range of frequencies is achieved, and thus broadband transparency. Experimental results are in excellent agreement with theory, despite the presence of losses and the finite size of the system.