9/26/2023 0 Comments Telescopes auditory illusionsThe compresence of different assessment methods allows a comparison between the “objective” and the “perceptual” sphere and helps underscore the multisensory nature of observers' perceptual and emotive evaluations. The flexibility of the proposed method allows a comparison of how participant reporting can vary across live viewing and memory recall conditions, allowing an examination of listeners' acoustic memory and expectations. Visual and acoustic assessments are complemented and contextualized by additional questions probing the subjective, objective, and descriptive assessments made by observers as well as how changes in airplane height over time may have influenced these perceptions. For the first time, we report how the perceived visual height of airplanes can be established using a combination of visual size, airplane size, reading distance, and airplane distance. We utilize a soundscape approach, based on acoustical indicators (dBs, L A, max, background sound pressure level) and social surveys: a combination of postal questionnaires (related to long-term exposure) and field interviews (related to the contextual perception), complementing well-established questions with others designed to capture new multisensory relationships. We propose a method to assess the visual impact of perceived aircraft height and size, beyond the objective increase in sound pressure level for a plane flying lower than another. ![]() Here we focus on one of such factors, the multisensory aspect of aircraft events. Very little is known on the reasons for this special status, including any interactions that non-acoustical factors may have in listener assessments. It is accepted knowledge that, for a given equivalent sound pressure level, sounds produced by planes are worse received from local communities than other sources related to transportation. 2Environmental Resources Management, London, United Kingdom. ![]() 1School of Engineering and Informatics, University of Sussex, Brighton, United Kingdom.Gianluca Memoli 1 * Giles Hamilton-Fletcher 1 Steve Mitchell 2
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