Simple Explanation

The range between the lowest and highest frequencies that a system can handle or transmit.

Concise Technical Definition

The numerical span between the upper and lower cutoff frequencies (usually measured at -3 dB points) that a device, signal, or system can effectively reproduce or transmit.

Layman-Friendly Analogy

Like the width of a pipe—wider bandwidth means more "sound" or "data" can pass through at once.

Industry Usage Summary

In audio and signal processing, bandwidth determines the frequency range a device can handle (e.g., an amplifier’s or speaker’s bandwidth might be 20 Hz–20 kHz); in filters, it's the distance between -3 dB roll-off points.

Engineering Shortcut

Bandwidth = High Cutoff – Low Cutoff (in Hz)

Full Technical Explanation

Bandwidth refers to the span of frequencies that a system, component, or signal can transmit, reproduce, or respond to—typically defined between its upper and lower cutoff frequencies (measured where the signal drops by 3 dB). In human hearing, this is often cited as 20 Hz to 20 kHz. Accurate bandwidth representation is critical in audio system design to ensure clarity, detail, and fidelity in the reproduction of sound.