Topmusicanswers
In a nutshell, sound is a compression wave. (It's usually drawn as a standing wave for simplicity.) Every pitch is at a set frequency, so the high point in the wave occurs every so often. An overtone, which is what a harmonic is, happens when you have two sound waves whose high points overlap at certain intervals.
- Why do harmonics arise?
- Why are harmonics used?
- Why do harmonics occur with Fourier transform?
- How do harmonics arise?
Why do harmonics arise?
Current harmonics are caused by non-linear loads. ... In power systems, harmonics are defined as positive integer multiples of the fundamental frequency. Thus, the third harmonic is the third multiple of the fundamental frequency. Harmonics in power systems are generated by non-linear loads.
Why are harmonics used?
In music, harmonics are used on string instruments and wind instruments as a way of producing sound on the instrument, particularly to play higher notes and, with strings, obtain notes that have a unique sound quality or "tone colour".
Why do harmonics occur with Fourier transform?
When the Fourier Transform (or FFT) shows the presence of harmonics, it simply means that SOMETHING in the circuit creates this extra energy. The presence of harmonics may be completely to be expected, and may require additional means to deal with them.
How do harmonics arise?
Harmonics are created by electronic equipment with nonlinear loads drawing in current in abrupt short pulses. The short pulses cause distorted current waveforms, which in turn cause harmonic currents to flow back into other parts of the power system.
