Determination of the totel sound pressure level

The program determines the total sound pressure level (denoted in the program as L_sum) resulting from the overlapping of sounds with known sound pressure levels (denoted L_p) for several (to one to six) noise sources. Sources of noise are marked with numbers from 1 to 6, and the value of the sound pressure level is illustrated by the height of a given bar and given above it in numerical form. The total level is represented by a green bar with the label "Total SPL" placed on the right side of the program window.

Using the program: 

The currently changed source is highlighted in black. The source change is carried out by means of the A and D keys. The value of the sound pressure level for the current ("black") source is changed by the W and S keys.