Neural Control and Coordination Question 59
59. What is intensity of sound in normal conversation?
[2001]
(a) 10-20 decibel
(b) 30-60 decibel
(c) 70-90 decibel
(d) 120-150 decibel
Show Answer
Answer : b
Hints & Solutions
(b) The word noise is taken from the latin word nausea and is defined as unwanted or unpleasant sound that causes discomfort.
| Source | Intensity ($dB$) |
|---|---|
| Breathing | $10$ |
| Broadcasting studio | $20$ |
| Trickling clock | $30$ |
| Library | $30-35$ |
| Normal conversation | $35-60$ |
| Telephone office Noise | $60-80$ |
| Alarm clock | $70-80$ |
| Traffic | $50-90$ |
| Motorcycle | $105$ |
| Jet fly over | $100-110$ |
| Train whistle | $110$ |
| Air craft | $110-120$ |
