Simple Explanation

A sound that’s too sharp, bright, or uncomfortable—especially in the higher frequencies.

Concise Technical Definition

A subjective audio descriptor indicating excessive energy in the upper-mid or high-frequency range, resulting in an unpleasant or fatiguing sound.

Layman-Friendly Analogy

Like the glare of a bright light in your eyes—too much treble can be harsh on the ears.

Industry Usage Summary

Commonly used in reviews and tuning feedback to describe overly aggressive or fatiguing treble; often addressed by EQ adjustments or damping.

Engineering Shortcut

Excess 2 kHz–6 kHz energy = ear fatigue = harshness.

Full Technical Explanation

In audio, “harsh” refers to a tonal quality that is unpleasantly sharp or aggressive, typically due to elevated energy in the upper midrange (2 kHz–6 kHz) or treble frequencies. Harshness can result from poor driver design, distortion, resonances, or imbalanced equalization. It is often associated with listening fatigue, as the human ear is particularly sensitive in this range. Engineers and listeners frequently address harshness by adjusting EQ curves, using better crossover design, or selecting materials that naturally damp unwanted resonances in tweeters or horns.