Languid height determines whether a flue pipe speaks promptly, slowly, or not at all.

Evidence

The height of the languid is fixed at manufacture for wooden pipes, but it can be altered for metal pipes. The languid controls, in part, the direction of the air flowing from the flue. If it is too high, the pipe will be slow to speak and may not speak at all if the air misses the upper lip completely. If it is too low, the pipe will speak too quickly or speak in an uncontrolled manner. A pipe is adjusted to speak more rapidly if it is set to speak with a consonantal chiff by means of little or no nicking. — David M. Howard, Jamie Angus, Acoustics and Psychoacoustics, 1149

Categorization

• XREF: connects to: Flue languid height precisely governs pipe speech timing and stability — David M. Howard, Jamie Angus, Acoustics and Psychoacoustics, 1149; Languid height governs air direction and thus promptness of pipe speech; Nicking the pipe edges smooths onset and suppresses high-frequency components (+1 more)

Broader Connections

• Flue languid height precisely governs pipe speech timing and stability #corroborates (0.95) — David M. Howard, Jamie Angus, Acoustics and Psychoacoustics, 1149
• Languid height governs air direction and thus promptness of pipe speech #expands (0.88)
• Stopped flue pipes sound their harmonics in a characteristic staggered order producing a chiff #expands (0.74) — David M. Howard, Jamie Angus, Acoustics and Psychoacoustics, 1448
• Nicking the pipe edges smooths onset and suppresses high-frequency components #qualifies (0.72)