The Influence of Visual Information on Assessment of Wind Turbine Noise

Invited paper

Anna Preis

Institute of Acoustics, Adam Mickiewicz University

Monday 1 june, 2015, 12:00 - 12:20

0.6 Madrid (49)

Current research into soundscape is carried out without taking into account the sense of sight. Nevertheless, there is no doubt that at the higher levels of the nervous system all the information coming from the different senses is merged together, integrated and analysed. The aim of this paper is to examine the influence of visual information on wind turbine noise assessment. A set of 10 different soundscapes and 7 landscapes, including both views of wind turbines and their noises, were recorded with an ambisonic microphone and high-definition video camera. The experiment took place in an anechoic chamber, appropriately adapted to present ambisonic recordings, with a set up of 25+1 speakers arranged in a cubic form, and also a large screen for video presentation. The experiment was divided into three parts, namely: auditory, visual, and audio-visual. In each part of the experiment the ICBEN scale (0-10) was used to rate the presented stimuli. In the first part, audio stimuli were presented randomly at 5 different levels: LAeq = 45, 50, 55, 60, 65 dB, and subjects were asked to rate the sound annoyance. Additionally, after that part of the experiment subjects were asked to listen again to the set of sounds and write the names of the identified (recognized) sound sources in each presented soundscape. In the second part of the experiment, participants were asked to rate how pleasant the presented landscapes were. Finally, in the last part of the experiment participants were presented with a compatible and incompatible mix of audio and visual stimuli and asked to rate the annoyance. The obtained results should provide an answer to the question of whether it is reasonable to analyse wind turbine noise without taking into account the sense of sight.

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