Fig. 1

Structural model of the NDVA. (a) diagram of the NDVA installed on the piping. (b) diagram of the resonant units embedded in the framework (c) diagram of the resonant unit. (d) diagram of the discrete model.

Structural model of the NDVA. (a) diagram of the NDVA installed on the piping. (b) diagram of the resonant units embedded in the framework (c) diagram of the resonant unit. (d) diagram of the discrete model.