The paper you linked suggests that horizontal turbines are even louder: “The noise emission at 6 m/s 10 m above ground was measured to 94.1 dBA, this while whi

The paper you linked suggests that horizontal turbines are even louder: “The noise emission at 6 m/s 10 m above ground was measured to 94.1 dBA, this while while operating at optimum tip speed. Available noise surveys performed on similar sized operating at optimum tip speed. Available noise surveys performed on similar sized HAWTs [27–30] HAWTs [27–30] has established noise emissions of 95.1–100.2 dBA and 97.3–102.4 dBA for 6 m/s and has established noise emissions of 95.1–100.2 dBA and 97.3–102.4 dBA for 6 m/s and 8 m/s respectively”