- Authors:
-
Steiner,
J.
,
Hilgemann,
F.
,
Jax,
P.
- Book Title:
- Proceedings of the 11th Convention of the European Acoustics Association Forum Acusticum 2025
- Organization:
- Sociedad Espanola de Acustica (SEA), European Acoustics Association (EAA)
- Status:
- accepted for publication
- Date:
-
Jun. 2025
- Language:
- English
Abstract
Unmanned aerial vehicles (UAVs) are known for their characteristic noise emissions, which are inevitable during operation, but often perceived as annoying. Current research on UAV noise mitigation focuses on passive technology, but active noise control (ANC), commonly used in headphones and related applications, might prove to be more effective. However, ANC algorithms require comprehensive knowledge of acoustic transfer paths, across all operational modes of the UAV. Commercially available UAVs lack components such as microphones and loudspeakers as required by ANC applications. The purpose of this work is to investigate the estimation accuracy achievable with a simplified linear time-invariant (LTI) model of the generally non-linear aerodynamic system of UAV sound emission. For this, a prototype UAV-ANC system, which extends a UAV with added microphones and loudspeakers, is considered. Extensive measurements are conducted in a controlled indoors environment to assess the applicability of state-of-art system identification methods for estimating the associated acoustic transfer paths. These transfer path estimates can be used to determine the efficacy of ANC algorithms in the considered application through simulation. They are made available online for research purposes.
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