Acoustic Comfort in Multi-group Conversation Space: a Field Experiment in an Actual Cafe with Different BGM Levels
* Presenting author
We refer to “Multi-group conversation space (MGCS)” as a space where more than one group are conversing within the group, such as restaurants or cafes, and have been researched to find acoustic comfort in MGCS considering speech intelligibility and speech privacy as major factors. In this study, a field experiment was carried out in an actual café, where a questionnaire was performed on the customers for four days. The level of BGM in the operating time was changed in each day with none and three levels and the indoor noise levels were measured by six microphones hung from the ceiling. The questionnaire consisted of eight questions including easiness of conversing, comfortableness, atmosphere(lively/relaxed), and so on. The customers were asked to answer the questions at each table and, at the same time, noise level in the vicinity of them was measured and the occupation of next seat were recorded. As a result, easiness of conversing tended to be evaluated better under the BGM of middle level than under that of high or low levels. Also, the impression evaluation varied by gender, age, or seat position and occupation.