Investigation of Low-Frequency Sound Radiation Characteristics and Active Control Mechanism of a Finite Cylindrical Shell

Figure 7

Amplitude and sound power of the a-modes and s-modes at resonance frequency (276 Hz). (a) Amplitude of the a-modes. (b) Amplitude of the s-modes. (c) Sound power of the a-modes. (d) Sound power of the s-modes.

(a)

(b)

(c)

(d)