3.2.Slope of the regression line for each gearU.K.
The sound measurements shall be evaluated as a function of engine speed in accordance with point 3.2.1.
3.2.1.Calculation of the slope of the regression line for each gearU.K.
The linear regression line is calculated using the anchor point and the four correlated additional measurements.
where nj = engine speed measured at line BB'
3.2.2.Slope of the regression line for each gearU.K.
The Slopek of a particular gear for the further calculation is the derived result of the calculation in point 3.2.1 rounded to the first decimal place, but not higher than 5 dB/1 000 min–1.