The volume of waves passing through a specified place in the interval of one next. The higher the frequency, the shorter the wavelength.???? ? ???? ?????? ??????? ?? ???? ???? ? ?? ???????? ?????? ??????? ?? ??? ? ?? ?????? ??? ????? ??? ???????? ?? ??????? ????? ??? ? ????? ??? ??? . ??????? ) ???????? ??? ( ?????? Temper and perfectly-getting are