Sound Reduction Index Calculator

Calculate Sound Reduction Index







Formula

The formula to calculate the Sound Reduction Index (R) is:

\[ R = L1 - L2 + 10 \log\left(\frac{S}{A}\right) \]

Where:

What is a Sound Reduction Index?

A sound reduction index is a metric used to measure the level of sound insulation a structure provides.

Example Calculations

Example 1:

Using the formula:

\[ R = 80 - 50 + 10 \log\left(\frac{10}{5}\right) = 80 - 50 + 10 \log(2) \approx 33.01 \text{ dB} \]

Example 2:

Using the formula:

\[ R = 90 - 60 + 10 \log\left(\frac{20}{10}\right) = 90 - 60 + 10 \log(2) \approx 33.01 \text{ dB} \]