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PROPAGATION OF SOUND WAVES IN DUCTS

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Figure

Figure 3.1  Reflection at a rigid termination. (Adapted from ref. [4].)
Figure 3.3 (a) Modulus (in  D c-units) and (b) phase of the wave impedance in a one-dimensional sound field for two different values of the standing wave ratio: ))) , 24 dB; - - -, 12 dB .
Figure 3.5 The ‘two-microphone’ technique of measuring absorption coefficients in a tube.
Figure 3.6 Modulus (in  D c-units) of the acoustic input impedance of a 50-cm long tube terminated by a rigid cap, measured using a sound intensity probe.
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