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(Color online) Pressure and ear-canal dimensions during down-swept tympanograms on a first test (left) and repeat test (right) 49 days later, with arrows increasing directional time course of pressurization. Row 1: air pressure versus time during initial, sweep, and final sections of the measurement. Row 2: Ear-canal area versus pressure. Row 3: Ear-canal length versus pressure. Row 4: Ear-canal volume versus pressure.
