fundamental frequency in Duits
The changeover of output channels (fundamental frequency to second harmonic and third or forth harmonics) is motorized and is provided by remote control (PC control).
One-third-octave band below the lowest fundamental frequency of the engine during test conditions; and
Sounding 1: the fundamental frequency of the separately sounded note shall be 660 Hz ± 30 Hz (high note).
The fundamental frequencies of the warning horn notes shall be:
These filters shall not exceed 60 kVAr capacitive reactive power at the fundamental frequency.
Electrical activity of the brain has a fundamental frequency, a point beyond which, it breaks down, like a bridge... breaking step over a bridge.
the lowest tone of a harmonic series: first harmonic, harmonic, fundamental