Acoustical4 play online

Acoustical 4 is an acoustical calculator for mobile devices that allows you to obtain anywhere and quickly the results of the application of complicated formulas that normally require the use of spreadsheets or multiple stages of calculation with a handheld calculator.
Available functions are:
1. Energetic addition.
2. Energetic subtraction.
3. Energetic average.
4. Weighted energetic average.