Common Fate Principle

Definition

A Gestalt perceptual principle applied to audio: sound components that change together (synchronous onsets, shared pitch modulation, common amplitude modulation) are perceived as originating from a single source.

Key Ideas

• If two frequency components start and stop together, the auditory system groups them as one source.
• If two components share vibrato or tremolo, they group together.
• Explains why harmonic complexes are perceived as a single sound — harmonics share fundamental frequency modulation.
• Key mechanism in both human ASA and computational separation — onset synchrony is a powerful grouping cue.

Relationships

• Core principle of ../concepts/auditory-scene-analysis and ../concepts/computational-auditory-scene-analysis
• Modern deep separation models implicitly learn common fate via training — correlates of onset synchrony appear in learned features
• Related to ../concepts/permutation-invariant-training — PIT aligns sources across frames, similar to how common fate tracks sources over time

Sources

None ingested yet — seed batch setup.