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Question : 54 of 100
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Solution:
- A decibel is a logarithmic unit used to measure sound level.
- It is also widely used in electronics, signals and communication.
- The higher the decibel level, the louder the noise.
- On the decibel scale, the level increase of 10 means that a sound is actually 10 times more intense, or powerful.
- A whisper is about 30 dB and a normal conversation is about 60 dB.
- Noise above 70 dB over a prolonged period of time may start to damage our hearing and Loud noise above 120 dB can cause immediate harm to our ears.
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