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El aleteo aeroelástico produce canciones de plumas de colibríes
Christopher J Clark1, Damian O Elias, Richard O Prum
1Department of Ecology and Evolutionary Biology, Post Office Box 208105, Yale University, New Haven, CT 06520, USA.
Science (New York, N.Y.)
|September 10, 2011
Resumen
Las canciones de cortejo de los colibríes son producidas por el aleteo de las plumas de la cola. El flujo de aire sobre plumas de formas únicas causa vibraciones, generando diversos sonidos y frecuencias armónicas.
Área de la Ciencia:
- La bioacústica es la bioacústica.
- La aerodinámica es muy importante.
- Comunicación con los animales Comunicación con los animales
Sus antecedentes:
- Los colibríes machos producen sonidos usando las plumas de la cola durante el cortejo.
- La variación de la forma de la pluma sugiere un papel en la producción de sonido.
Objetivo del estudio:
- Para investigar el mecanismo de producción de sonido por las plumas de la cola de los colibríes.
- Para determinar cómo la forma de la pluma influye en las características del sonido.
Principales métodos:
- Utilizó la vibrometría Doppler láser de escaneo y vídeo de alta velocidad en un túnel de viento.
- Analizó plumas individuales de diferentes tamaños y formas.
- Se examinó el acoplamiento aerodinámico entre plumas adyacentes.
Principales resultados:
- El aleteo de las plumas inducido por el flujo de aire genera sonido.
- Diferentes formas de plumas y modos vibratorios producen variadas frecuencias acústicas y armónicos.
- El acoplamiento aerodinámico entre plumas puede aumentar el volumen o crear frecuencias de interacción.
Conclusiones:
- El aleteo aeroelástico de aeropuertos rígidos como plumas es el mecanismo para el sonido inducido por aleteo en el vuelo de las aves.
- Este mecanismo explica los sonidos tonales observados en las exhibiciones de cortejo de los colibríes.
- La forma y disposición de las plumas son fundamentales para generar diversos sonidos de cortejo.
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