Sound Radiation Characteristics of a Rectangular Duct with Flexible Walls

Figure 6

(a) Fundamental structural duct mode shape at 99.22 Hz, numerical. (b) Fundamental structural duct mode shape at 99.26 Hz, analytical. (c) Tenth duct mode shape at 208.72 Hz, numerical. (d) Tenth duct mode shape at 209.76 Hz, analytical.

(a)

(b)

(c)

(d)