Fig. 6.
Steady responses of the NAM plate. a–d Steady response amplitudes v rsp and e–h the corresponding transmissions T v at points A and B changing with v ex under four frequencies 26, 48.75, 280 and 325 Hz in the first, the second and the third passbands, as labeled in Fig. 5a. In each legend, the frequency indicates that the diagram is relevant to this frequency and A (B) denotes v rsp or T v at point A (B) under that frequency