To break tympanum and cause permanent hearing loss, the magnitude of noise pollution required is

Options

A. 100 dB
B. 50 dB
C. 4000-50000 hz
D. 90 dB

Answer

To determine the magnitude of noise pollution required to break the tympanum (eardrum) and cause permanent hearing loss, we need to analyze the options provided and understand the context of noise levels.

### Step-by-Step Solution:

1. **Understand the Concept of Decibels (dB)**:
- Decibels (dB) are a unit of measurement for sound intensity. Higher dB levels indicate louder sounds.

2. **Identify Noise Pollution Levels**:
- Noise pollution refers to unwanted or harmful levels of sound that can affect human health and well-being.

3. **Recognize Dangerous Sound Levels**:
- Brief exposure to sound levels around 100 dB to 150 dB can be harmful. Sounds at this level can cause immediate damage to hearing.

4. **Evaluate the Options**:
- The options provided are:
- 100 dB
- 50 dB
- 4000 to 5000 Hz
- 4000 to 50000 Hz
- 90 dB
- Among these, 100 dB is recognized as a threshold where damage can occur.

5. **Conclusion**:
- The correct answer is **100 dB**, as this level of noise can break the tympanum and lead to permanent hearing loss.

### Final Answer:
To break the tympanum and cause permanent hearing loss, the magnitude of noise pollution required is **100 dB**.

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