This creates extra harmonics that are not present in the original signal.

Lightly touching the string with a fingertip at a harmonic node creates harmonics.

The drummer created eerie harmonics by rubbing the butt of a drumstick in a circular motion over the cymbol.

However, the magnetometer electronics created harmonics which interfered with readings.

A heterotic string is embedded in the membrane that creates harmonics on the string which translate into mass and energy through mechanisms discussed above.

If the sinewave is run through a stateless nonlinear circuit (transcribing function), the resulting distortion creates harmonics.

Lightly touching the string with a fingertip at a harmonic node while bowing close to the bridge can create harmonics.

Occasionally on a guitar, violin, or other stringed instrument, nodes are used to create harmonics.

Conversely, a system which changes the shape of the wave (beyond simple scaling or shifting) creates additional harmonics (harmonic distortion).

This is achieved by reversing the signal phase to the driving coil, which dampens the string's fundamental frequency and creates higher harmonics.