Improving the sound environment in a support facility for individuals with ASD and severe intellectual disabilities

This study examined residential care facilities for individuals with autism spectrum disorder (ASD) and severe intellectual disabilities. Based on sound environmental measurements taken during daily activities at the facility, as well as a questionnaire survey of staff members, we investigated possibilities for environmental improvement. The observed activities included simple tasks and pottery making. The sound environment was characterized by frequent banging noises and loud vocalizations or shouting from residents, which often spread to others and affected their emotional state. Indoor noise levels frequently exceeded 70 dB. According to the staff survey, these sounds generated by residents were associated with increased physical and mental fatigue among caregivers. As part of the improvements, sound-absorbing materials were installed in the rooms and a sound masking system was introduced. These measures received positive feedback from staff, suggesting that acoustic modifications can contribute to an improved care environment.