Ormsby filter

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English[edit]

Noun[edit]

Ormsby filter ‎(plural Ormsby filters)

  1. A filter of trapezoidal shape specified by four corner frequencies, f 1, f 2, f 3, f 4. The filter rejects below f 1 and above f 4, is linear from f 1 to f 2 and from f 3 to f 4, and flat from f 2 to f3.