Loud noise causes

Options

A. Irritation
B. Irrationality
C. Impairment of hearing
D. Dilation of blood vessels.

Answer

**Step-by-Step Solution:**

1. **Understanding Noise**: Start by defining what noise is. Noise is typically characterized as sound that is unpleasant or disruptive, often at a high volume or loudness.

2. **Characteristics of Loud Noise**: Recognize that loud noise is associated with high vibrations. The intensity of the sound increases with the amplitude of the vibrations.

3. **Effect on the Eardrum**: When loud noise reaches the ear, it impacts the eardrum (tympanum). The eardrum is sensitive to vibrations, and loud sounds can cause it to vibrate excessively.

4. **Consequences of Loud Noise**: The excessive vibrations can lead to damage to the eardrum. This damage can result in difficulty hearing, which is referred to as impairment of hearing.

5. **Evaluating Options**:
- Option 1 (Irritability): While loud noise can cause irritation, it is not the primary effect associated with loud noise.
- Option 2 (Irrationality): Loud noise does not directly cause irrational behavior.
- Option 3 (Impairment of Hearing): This is the most accurate consequence of loud noise, as it directly relates to the damage caused to the eardrum.
- Option 4 (Dilation of Blood Vessels): Loud noise does not have a direct effect on blood vessel dilation.

6. **Conclusion**: Based on the analysis, the correct answer to the question "Loud noise causes" is option three: impairment of hearing.