[EN] In a passive lossy acoustical system, sum rules derived from passivity explicitly relate the broadband response to the spatial dimension of the system, which provide important design criteria as well. In this work, ...
Qu, Sichao; Gao, Nan; Tinel, Alain; Morvan, Bruno; Romero-García, Vicente; Groby, Jean-Philippe; Sheng, Ping(American Association for the Advancement of Science, 2022-05-20)
[EN] By using a structured tungsten-polyurethane composite that is impedance matched to water while simultaneously having a much slower longitudinal sound speed, we have theoretically designed and experimentally realized ...