Sound waves are fluctuations in pressure traveling through a medium away from a source of mechanical disturbance. Tympanal ears are designed to detect these minute pressure changes traveling through air or water. Depending on the structural design of the ears, they may convey information about the location, frequency, and intensity of an acoustic stimulus.

There are two distinct types of insect tympanal ears: pressure receivers and pressure difference receivers (or pressure gradient receiver). In a pressure receiver, the tympanal membrane forms one side of an otherwise enclosed air chamber. The

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