trillingsamplitude

Trillingsamplitude is a quantitative descriptor used in audio signal analysis and related fields to characterize the amplitude of a trill—the rapid, periodic modulation component embedded within a carrier signal. In this usage, a trill refers to a high-frequency oscillation that alternates around or beside the base waveform. The trillingsamplitude specifies the peak excursion of that high-frequency component, typically expressed as a linear amplitude ratio or in decibels relative to the carrier amplitude.

To measure trillingsamplitude, the trill component can be isolated with bandpass filtering around the trill frequency, or by demodulation with a high-frequency detector, followed by envelope extraction (for example via the Hilbert transform) and measurement of the peak or RMS value. The measurement can be performed in short time windows to track changes in trillingsamplitude over time.

Applications include realistic synthesis of musical trills, analysis of animal vocalizations or human speech with rapid modulations, and vibration analysis in mechanical systems where chatter or high-frequency tremor occurs.

Relation to other concepts: trillingsamplitude is related to but distinct from carrier amplitude, with parallels to amplitude modulation depth. It is conceptually similar to the depth parameter used in tremolo or vibrato analyses, but specific to the amplitude of the trill component rather than the overall modulation.

See also: amplitude modulation, tremolo, vibrato, trill, envelope, Hilbert transform.