___ ear plays an important role in amplifying the vibrations received on the tympanum membrane.

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Solution

Middle ear plays an important role in amplifying the vibrations received on the tympanum membrane. The chain of three bones, malleus, incus and stapes help to do the same. The oval window is a membrane, the covered ending of the middle ear it opens into the inner ear through round window.

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Amplification and transmission of the vibrations received by tympanum into the inner ear are done by:

\begin{matrix} Parts & Function (a) External ear & (i) Amplifies the vibrations received on the tympanic membrane. (b) Middle Ear & (i i) Converts the vibrations into nerve impulses and sends them to brain. (c) Inner Ear & (i i i) Directs the sound waves towards the tympanic membrane. \end{matrix}

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