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. 2010 Mar;127(3):1411–1421. doi: 10.1121/1.3290995

Figure 5.

Figure 5

Space constants characteristic of BM longitudinal coupling (λBM) and TM longitudinal coupling (λTM) as a function of the frequency (normalized to the CF). For BM longitudinal coupling there are two space constants because Eq. 5 is quadratic in kbm (Ref. 2). At low frequencies the space constants for the BM and the TM are similar (about 20 μm for the BM and 12 μm for the TM). But close to CF, the space constants characteristic of TM longitudinal coupling are more than three times as high as the space constant characteristic of BM longitudinal coupling.