Sound is amplified by the

Options

A. Pinna
B. Ear ossicles
C. Round window
D. Tympanic membrane

Answer

### Step-by-Step Solution:

1. **Understanding Sound Amplification**:
- Sound amplification refers to the process of increasing the volume or loudness of sound. This can be achieved through various means, including mechanical, electronic, or acoustic methods.

2. **Role of the Ear in Sound Amplification**:
- The ear is the primary organ responsible for hearing and plays a crucial role in amplifying sound.

3. **Pathway of Sound in the Ear**:
- When sound waves enter the ear, they first strike the **tympanic membrane** (also known as the eardrum), causing it to vibrate.

4. **Transmission of Vibrations**:
- These vibrations are then transmitted to three tiny bones in the middle ear known as the **ossicles** (malleus, incus, and stapes).

5. **Function of the Ossicles**:
- The ossicles act as a lever system that amplifies the sound vibrations. They increase the force of the vibrations before passing them to the inner ear.

6. **Cochlea's Role**:
- The amplified sound vibrations then travel to the **cochlea**, which is a fluid-filled structure in the inner ear. The cochlea converts these vibrations into nerve impulses.

7. **Final Processing in the Brain**:
- Finally, these nerve impulses are sent to the brain, where they are interpreted as sound.

8. **Conclusion**:
- Therefore, the sound is amplified by the **ossicles** in the ear.

### Final Answer:
Sound is amplified by the **ossicles** in the ear.

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