harmonic distortion measurement

Harmonic distortion measurement assesses how much an audio or electrical signal deviates from its pure, original form. When a device processes a signal, it can unintentionally introduce additional frequencies called harmonics, which are multiples of the original signal’s frequency. These harmonics can make the sound or electrical output less clear or accurate. Measuring harmonic distortion quantifies this effect, typically expressed as a percentage, helping engineers evaluate the quality and fidelity of audio equipment or electrical systems. A lower percentage indicates a cleaner, more faithful reproduction of the original signal.