Simple Explanation

A soft, high-pitched noise like static or air leaking, often heard in quiet parts of recordings.

Concise Technical Definition

Random high-frequency noise, typically in the 2 kHz to 8 kHz range, often associated with analog media or electronic circuits.

Layman-Friendly Analogy

Like the sound of a leaky gas valve or an untuned radio—quiet, high-pitched, and constant.

Industry Usage Summary

Common in analog tape recordings, preamps, and lower-quality digital systems; often masked or reduced using noise reduction tools.

Engineering Shortcut

Broadband high-frequency noise; usually 2 kHz–8 kHz.

Full Technical Explanation

Hiss is a form of broadband noise concentrated in the higher frequency range, generally between 2 kHz and 8 kHz. It is often described as sibilant or static-like and is commonly associated with analog tape recordings, poorly shielded electronics, or high-gain circuits such as preamps. In digital systems, hiss may result from quantization noise or poor analog-to-digital conversion. While not typically as intrusive as hum or buzz, hiss can degrade audio quality, especially in quiet passages. Noise reduction systems like Dolby NR were specifically developed to reduce tape hiss without compromising signal fidelity.