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Velocity amplitude plotted versus (a) fundamental frequency and (b) sound pressure level. No relationship was found between velocity amplitude and fundamental frequency, or velocity amplitude and sound pressure level. The symbols denote: + Subject 1, Session 1; ○ Subject 1, Session 2; ∗ Subject 2, Session 1; △ Subject 2, Session 2; × Subject 3, Session 1; and □ Subject 3, Session 2.
