Auditory-perception-based tuneable noise control approach for improving acoustic comfort and behaviour of autistic individuals in indoor/outdoor environments

Abstract

This study investigates the distinct auditory perception patterns in autistic children compared to non-autistic peers, focusing on the impact of auditory stimuli on behavioural responses. We conducted a two-phase study: the first phase involved subjective assessments of auditory perception using tonal stimuli, whereas the second phase developed a personalised noise-control strategy based on these perceptions. The study enrolled 83 children in the autism group and 50 children in the comparison group, aged 7–12 years. Findings revealed that autistic children exhibited decreased tolerance to tonal stimuli starting at 40 dB HL. The perceived difference ranged from 5 dB to 20 dB, with 250 Hz showing the greatest difference to the comparison group. Clustering analysis identified distinct profiles within the autism group. The proposed auditory perception-based tuneable noise-cancelling headset was evaluated using everyday sound stimuli and was effective in mitigating unpleasant aural perception. A mobile application was introduced to facilitate real-time assessments and personalised interventions. After a three-week period of using the proposed headset, eighteen parents reported that they observed improvement in their children's reaction to sensitive sound, while the other six parents did not observe any changes. The study's results highlight the importance of personalised auditory interventions to alleviate sensory overload and enhance the quality of life of autistic children.