amplitudebased

Amplitudebased is a descriptor used in various technical fields to denote approaches, models, or analyses that rely primarily on the amplitude, or magnitude, of a signal or quantity, rather than its phase, frequency, or timing. The term is not tied to a single discipline and is often used interchangeably with "amplitude-based," though some writers prefer the hyphenated or concatenated form in digital texts. It is descriptive rather than a formal technical standard.

In signal processing and communications, amplitude-based methods include envelope detection, amplitude thresholding for event detection, and power-based metrics that use RMS or instantaneous magnitude to classify signals or detect features. In audio and music technology, amplitude envelopes and dynamic range processors manipulate a signal's amplitude over time to shape loudness independent of spectral content.

In neuroscience and physiology, amplitude-based coding refers to representations that encode information in the magnitude of neural responses or evoked potentials rather than their timing or phase. In other domains such as image or seismic analysis, amplitude can serve as a primary discriminant for feature extraction or anomaly detection.

Because amplitude can be influenced by gains, attenuation, or measurement units, amplitude-based methods often require normalization or calibration to enable cross-signal comparisons. They may be complemented by frequency- or phase-based analyses to provide a fuller description.