Construct · 1 fields · 1 citations

comb filtering: a standalone construct

One name. One construct. A landmark on the map.

● anchor · a standalone construct in acoustics Nearest construct by meaning·not indexed
combfiltering1 CONSTRUCTComb filteringDELAY · NOTCHES

A single standalone construct; nearby constructs are located against it in the Collider. Tap a field for its definition, unit, and measures.

Acoustics

Peaks and notches from a delayed copy

Comb filtering is the pattern of regularly spaced peaks and deep notches in a frequency response that appears when a signal is summed with a slightly delayed copy of itself: at frequencies where the delay equals a whole number of periods the copies reinforce, and where it equals a half period they cancel, giving a response that looks like the teeth of a comb. Everest and Pohlmann's Master handbook of acoustics describes how this arises from reflections off nearby surfaces or from mixing two microphone signals, and how the notch spacing is set by the delay time. The referent is an interference-filtering effect, with notch spacing equal to the reciprocal of the delay, assessed from the summed frequency response.[1]

Unit
The notch spacing in hertz, equal to the reciprocal of the delay time
Recovery means
Not applicable
Measured by
Identified from the summed frequency response as evenly spaced notches at multiples of the inverse delay

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Nearby constructs

precedence effect3 names · 3 citationsjangle · one construct, three namescancel1 fields · 1 citationsanchor · a standalone constructfrequency4 fields · 7 citationsjingle · one word, four constructs

References

  1. Everest, F. A., & Pohlmann, K. C. (2009). Master handbook of acoustics (5th ed.). McGraw-Hill. ISBN 9780071603324

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