Publications [#229876] of Stephen Nowicki
search PubMed.Papers Published
- Nowicki, S; Capranica, RR, Bilateral syringeal interaction in vocal production of an oscine bird sound.,
Science (New York, N.Y.), vol. 231 no. 4743
(March, 1986),
pp. 1297-1299 [doi] .
(last updated on 2024/07/22)Abstract:
The vocal organ, or syrinx, of oscine birds has two parts, each of which has generally been presumed to operate independently of the other. A significant counter-example is now demonstrated in the production of a common vocalization by the black-capped chickadee (Parus atricapillus), in which the two acoustic sources interact in a nonlinear fashion. This bird produces a sound with multiple frequency components that are heterodyne products resulting from cross-modulation between two signals, thus providing evidence that avian phonation can involve cooperative coupling between the two syringeal sources.