#### Answer

When $P \lt 0$, the eardrum would be vibrating outward.

#### Work Step by Step

When P is negative, there is a decrease in pressure and the eardrum is pushed outward. Therefore, when $P \lt 0$, the eardrum would be vibrating outward.

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Published by
Pearson

ISBN 10:
978-0-13-421743-7

ISBN 13:
978-0-13421-743-7

When $P \lt 0$, the eardrum would be vibrating outward.

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