The loudness of a sound that a person can withstand without discomfort is about (A) 150 dB (B) 215 dB (C) 30 dB (D) 80 dB

Options

A. 150 dB
B. 215 dB
C. 30 dB
D. 80 dB

Answer

To determine the loudness of a sound that a person can withstand without discomfort, we need to evaluate the options provided in the question.

1. **Understanding Decibels (dB)**: Decibels are a unit of measurement for sound intensity. The human ear can tolerate a range of sound levels, but there are thresholds for comfort.

2. **Evaluating the Options**:
- **Option A: 150 dB**: This level is extremely loud and can cause pain and hearing damage.
- **Option B: 215 dB**: This is an extraordinarily high level of sound that is well beyond human tolerance and can cause immediate harm.
- **Option C: 30 dB**: This is a very quiet sound level, typically associated with a whisper or quiet library.
- **Option D: 80 dB**: This level is considered to be at the upper limit of what most people can tolerate without discomfort. It is comparable to the sound of heavy traffic or a vacuum cleaner.

3. **Conclusion**: Based on the evaluation, the loudness of a sound that a person can withstand without discomfort is approximately **80 dB**. Therefore, the correct answer is **(D) 80 dB**.