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Treichel, Julia

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Enddatum: 2023 × Thema: Lärm ×

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    Applicability of ISO standard 3744 to UA
    (2022) Foerster, Jan; Treichel, Julia; Volkert, Andreas
    Unmanned Aircraft Systems (UAS) are used for a variety of purposes. Especially the industrial or professional use of unmanned aircraft (UA) will lead to an increasing number of possible applications. The steadily rising number of UA raises the question of noise impact on the society from these vehicles. For the first time, an EU regulation provides a uniform noise rating for UA. It involves the introduction of a label for the guaranteed sound power level. This level is to be determined via EN ISO 3744:2010 by means of an enveloping surface method. Manufacturers are required to document the guaranteed sound power level as part of their CE marking. In addition, the EU regulation specifies a maximum permissible sound power level. The permitted level depends on the weight of the UA. Therefore, the German Environment Agency has started with acoustic investigations of UA. Various small multicopter) were used for the measurements in accordance with the EU regulation. This paper presents the results of the measurements and shows whether the requirements of the EU regulation are complied with. The challenges for users of the applicable measurement standard are also highlighted.
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    Noise measurements from drones to estimate future noise exposures
    (2023) Foerster, Jan; de Haag, Maarten Uijt; Treichel, Julia
    Unmanned Aircraft Systems (UAS) are used for a variety of purposes. Especially the industrial or professional use of UAS will lead to an increasing number of possible applications. The steadily increasing number of drones raises the question of noise impact from these unmanned aircraft. Therefore, the German Environment Agency has started with acoustic investigations of drones. Various small UAS models (i.e. multicopter) were used in a measurements campaign. For example, overflights at different altitudes and speeds were measured. In addition, binaural measurements were performed to provide psychoacoustic findings. In this paper the measurements and results are presented. Overflight levels are compared with psychoa-coustic quantities such as loudness or sharpness. Likewise, conclusions are drawn for the evaluation of drone noise, which can be used for future regulations or standardization. © International Institute of Acoustics and Vibration (IIAV), 2023