Which of the following function is not associated with middle ear ?

Options

A. Amplification of sound wave
B. Equilibrium of air pressure
C. Transmission of sound wave from external ear to internal air
D. Static equilibrium

Answer

**Step-by-Step Solution:**

1. **Identify the Functions of the Middle Ear:**
- The middle ear is primarily responsible for the amplification of sound waves, equalizing air pressure, and transmitting sound waves from the external ear to the internal ear.

2. **Evaluate Each Option:**
- **Option 1: Amplification of the sound wave**
- This function is associated with the middle ear. The three ossicles (Malleus, Incus, and Stapes) play a crucial role in amplifying sound waves.
- **Option 2: Equilibrium of the air pressure**
- This function is also associated with the middle ear. The Eustachian tube helps maintain air pressure between the middle ear and the external environment.
- **Option 3: Transmission of sound wave from external to internal ear**
- This function is associated with the middle ear. It acts as a bridge for sound waves traveling from the external ear to the internal ear.
- **Option 4: Static equilibrium**
- This function is NOT associated with the middle ear. Static equilibrium is maintained by the inner ear, specifically by the otolith organs.

3. **Conclusion:**
- The function that is not associated with the middle ear is **static equilibrium**.

**Final Answer: Static equilibrium is not associated with the middle ear.**

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