App Description

Online calculation method for day and night equivalent sound level:

$$ Ldn=10lg[ \frac {16 \times 10^{0.1Ld}+8 \times 10^{0.1(Ln+10)}}{24}] $$

Ld - the equivalent A sound level during the day, dB

Ln - equivalent A sound level at night, dB

Usage example

Input data:

Ld—the equivalent A sound level during the day: 20

Ln—Equivalent A sound level at night: 10

Click "Calculate" to output data

Day and night equivalent sound level: 46.051

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