Autor:	Makarewicz, Rufin, Golebiewski, Roman
Rok vydání:	2013
Předmět:	Physics - Atmospheric and Oceanic Physics
Druh dokumentu:	Working Paper
Popis:	Due to swish and thump amplitude modulation, the noise of wind turbines cause more annoyance than other environmental noise of the same average level. The wind shear accounts for the thump modulation (van den Berg effect). Making use of the wind speed measurements at the hub height, as well as at the top and the bottom of the rotor disc (Fig.1), the non-standard wind profile is applied. It causes variations in the A-weighted sound pressure level, LpA. The difference between the maximum and minimum of LpA characterizes thump modulation (Fig.2). Comment: 13 pages, 8 figures, submitted to Acta Acustica united with Acustica
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1306.2752 Zobrazit plný text záznamu View this record from Arxiv