Compatibility of data collection protocol in ISO 12913-2 for urban soundscape assessment
Résumé
With the introduction of the soundscape concept, various studies on soundscape evaluation methods and tools have been conducted. Assessment methods based on questionnaires (Methods A and B) and narrative interview (Method C) have been standardized in ISO 12913-2. However, because the quality assessment items used in surveys are based on complex soundscape environments, there may be compatibility problems in using the same protocols in other languages. Furthermore, not enough research has been conducted to examine the relationship among the assessment tools. Therefore, in this study, the compatibility of various evaluation methodologies, including the ones provided by the ISO standard, are compared in a virtual reality (VR) environment, which comprises 10 locations in Seoul that reflect different functions of the city. On the first day of the evaluation, questionnaires, a semantic expression test, and open answers (sonic mind map) were used. On the second day, narrative interview was conducted for the same audio-visual stimuli. The results of Methods A and B corresponded well with the results of Method C in terms of vocabulary frequency and semantic connection. From the adjective word evaluation, factors such as comfort, visual aesthetic, and tranquility were found to be main factors, while based on the sonic mind map, natural factors were found to be of importance in constructing a positive soundscape. Based on these findings, an application method for soundscape data collection is proposed.
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