The loudness of the sound is measured in the unit known as :
Show Hint
Pain threshold: Above \( 120\ dB \).
Noise pollution is usually measured over time as \( L_{eq} \).
- Millimeter
- Centimeter
- Decimal
- Decibel
The Correct Option is D
Solution and Explanation
• Sound intensity or loudness is a physical quantity that measures the pressure levels of sound waves.
• Standard units are used to measure different dimensions like length, weight, and intensity.
Step 1: Define the units in the options
• Millimeter and Centimeter: Units of length.
• Decimal: A system of numbers or a point in a fraction.
• Decibel (\( dB \)): A logarithmic unit used to express the ratio of sound intensity.
Step 2: Match loudness to its unit
The loudness of sound, which determines noise pollution levels, is measured in Decibels.
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