Clarify the units of the frequencies in the first output argument in the...

Clarify the units of the frequencies in the first output argument in the header documentation of rectRoomPtSrc

Sound Fields/MATLAB/Functions/rectRoomPtSrc.m

@@ -82,7 +82,7 @@
 %                    matrix with the first dimension denoting the number of
 %                    modes, the first three numbers of the second dimension
 %                    being the mode indices and the last number being the
-%                    corresponding frequency.
+%                    corresponding frequency in Hz.
 % 
 % waveField [numeric]: The complex pressures at the position of the
 %                      receivers. The variable is an array of dimensions