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Nursery facilities in Japan have recently been experiencing problems with their sound environments, such as insufficient sound absorption and high volume of generated sound. We therefore examined some approaches to creating an acoustic environment that supports communication in the classroom. As a result of addressing room acoustics by installing materials with an average sound absorption coefficient of 0.25 or more in the classroom, both the impression of the sound and the teacher's reporteddoi:10.18154/rwth-conv-239286 fatcat:rdmiqefo5fflnpnu2r5hslzve4