The effects of tracheal coiling on the vocalizations of cranes (Aves; Gruidae)

@article{Gaunt2004TheEO,
  title={The effects of tracheal coiling on the vocalizations of cranes (Aves; Gruidae)},
  author={Abbot S. Gaunt and Sandra L. L. Gaunt and Henry D. Prange and Jeremy S. Wasser},
  journal={Journal of Comparative Physiology A},
  year={2004},
  volume={161},
  pages={43-58}
}
SummaryIt is generally supposed that the elongated, often coiled tracheae of many species of birds are adaptations for the production of loud, penetrating calls. A corollary supposition is that the acoustic effects are produced by the resonant properties of the elongated tube, with the birds being analogized to a wind instrument. We have experimented with several species of cranes possessing different degrees of tracheal coiling. Regardless of the degree of coiling, all cranes can utter… 
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References

SHOWING 1-10 OF 45 REFERENCES
Pressure and air flow during distress calls of the starling, Sturnus vulgaris (Aves;Passeriformes)
TLDR
These studies suggest that reduction of the syringeal lumen in songbirds is at least partially dependent on active con- striction rather than a passive flutter valve.
Bilateral syringeal coupling during phonation of a songbird
  • S. Nowicki, R. Capranica
  • Biology
    The Journal of neuroscience : the official journal of the Society for Neuroscience
  • 1986
TLDR
The results suggest that coupling arises from a passive physical interaction between the 2 syringeal sources which is activated or regulated in some fashion by neural control from either side.
SYRINGEAL MECHANICS REASSESSED: EVIDENCE FROM STREPTOPELIA
ABSTi•ACT.--Avian phonations are generally reported to consist of an harmonic series or sounds with no overtones (pure tones). Neither of these kinds of sounds is produced by freely oscillating,
The Vocal Apparatus of Some North American Owls
TLDR
In examining syringes of eight species of owls from the western United States I have encountered some sex differences which are correlated with differences in the utterances of the birds, and, secondly, some facts decidedly at variance with Beddard's descriptions and illustrations.
Vocal tract resonances in oscine bird sound production: evidence from birdsongs in a helium atmosphere
TLDR
Not only does the songbird's vocal tract act as an acoustic filter, but its filter characteristics are actively coordinated with the output of the syrinx, suggesting that birdsong and human phonation are more analogous than previously thought.
Respiratory Mechanics of Sound Production in Chickens and Geese
TLDR
Simultaneous measurement of tracheal flow and pressure indicate that the glottis is capable of controlling air flow over a wide range of values in the presence of high pressures.
TRACHEAL DEAD SPACE IN THE RESPIRATION OF BIRDS
TLDR
The increasing availability of data on commonly measured physiological and anatomical features permits allometric consideration of convergence, giving rather far-reaching implications and suggestions from such a simple technique.
Power Capabilities of the Avian Sound-Producing System
TLDR
There was some evidence that performance was related to size in the songbirds as a group, the smaller bird being less effective than the larger, and to possible effects of scale on the efficiency of the fundamental sound-producing process.
An hypothesis concerning the relationship of syringeal structure to vocal abilities
TLDR
Syringeal complexity may not be an adaptation for plastic vocal behavior, but it is permissive of and probably prerequisite for such behavior.
...
...