Event
Passive noise reduction for flapping membrane wings: snap-through noise reduced by up to 8 dB
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Yi Lun Duh, Krispin C. V. Broers, and Sophie F. Armanini published a paper studying two passive geometric methods to reduce the acoustic signature of flapping membrane wings, validated on an example wing. After optimizing the wing vein layout based on a dynamic snap-through model of the membrane wing, experiments measured up to an 8 dB reduction in stroke-reversal snap-through noise; additional trailing-edge bristles inspired by hummingbird feathers further reduced broadband whoosh noise by 3–4 dB without loss of lift. The paper also notes that engineered wings are 15–30 dB noisier than the animals they mimic.
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- Research on Acoustic Signature Optimization for Bioinspired Flapping-Wing Micro Air Vehicles
This paper investigates two passive geometric approaches to reduce the acoustic signature of a flapping membrane wing and validates them on an exemplary wing. After optimizing the venation layout based on a dynamic snap-through model of the membrane wing, experiments measured a reduction of up to 8 dB in the stroke-reversal snap noise; an additive trailing-edge fringe inspired by hummingbird feathers further reduced the broadband swoosh by 3–4 dB without loss of lift. The paper notes that engineered wings are 15–30 dB louder than the animals they imitate.
arXiv cs.RO ·