A noise level of 100 decibels would correspond to
- AJust audible sound
- BOrdinary conversation
- CSound from a noisy street
- DNoise from a machine shop
- ENone of the above/More than one of the above
Show answer and explanation
Correct answer: (d) Noise from a machine shop
Explanation
A level of about 100 decibels is the noise of a machine shop or a heavy truck: loud enough to damage hearing over time.
A whisper is about 30 dB, ordinary conversation about 60 dB and a busy street about 70–80 dB.