The vibration inside the inner ear are converted into electrical signals by the:

Options

A. cochlea
B. tympanic membrane
C. pinna
D. anvil

Explanation

To answer the question, "The vibration inside the inner ear is converted into electrical signals by the:", we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Structure of the Ear**:
- The human ear is divided into three main parts: the outer ear (pinna), the middle ear (which includes the eardrum and ossicles like the hammer, anvil, and stirrup), and the inner ear (which contains the cochlea).

2. **Role of the Cochlea**:
- The cochlea is a spiral-shaped structure in the inner ear. It plays a crucial role in the hearing process. When sound waves enter the ear, they cause the eardrum to vibrate.

3. **Conversion of Vibrations**:
- The vibrations from the eardrum are transmitted through the ossicles (hammer, anvil, and stirrup) to the cochlea. Inside the cochlea, these mechanical vibrations are converted into electrical signals.

4. **Transmission to the Brain**:
- Once the cochlea converts the vibrations into electrical signals, these signals are sent to the brain via the auditory nerve, allowing us to perceive sound.

5. **Conclusion**:
- Therefore, the correct answer to the question is that the cochlea is responsible for converting vibrations into electrical signals.

### Final Answer:
The vibration inside the inner ear is converted into electrical signals by the **cochlea**.

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