Sagedusvahe

Sagedusvahe is the difference or spacing between two frequencies, expressed in hertz (Hz). It is a fundamental quantity in physics and engineering for describing how far apart two signals or spectral features lie on the frequency axis. The quantity is typically denoted Δf, and its magnitude is the absolute value of the difference between the two frequencies, f1 and f2.

In practice, sagusvahe is used to specify channel spacing in communications, to define a grid of allowed frequencies that minimizes interference. Common examples include fixed spacings like 12.5 kHz, 25 kHz, or 200 kHz depending on regulatory and technology requirements. In signal processing, the frequency resolution of a discrete Fourier transform is set by Δf = Fs/N, where Fs is the sampling rate and N is the number of samples.

In spectroscopy and optics, the sagusvahe between spectral lines reflects energy differences and transition frequencies. In music and acoustics, while pitch is often discussed as a ratio (an octave corresponds to a doubling of frequency), the straight frequency difference can also be used to describe tonal spacing in certain contexts.

Measurement of sagusvahe typically uses a frequency counter, a spectrum analyzer, or a calibrated reference oscillator; in digital systems the value is derived from sampling parameters and the spectrum estimate.

Related topics include frequency offset, channel spacing, and spectrum analysis.