Perceptual Calibration and Passive Adaptation in Under-Pillow Audio Systems for Sleep and Care Environments

This concept note outlines a perceptually adaptive audio system designed for under-pillow and near-field sleep audio applications. The approach integrates real-time calibration, non-invasive perceptual tuning, and passive behaviour-responsive adjustment to improve comfort, clarity, and accessibility in shared and sensitive environments. Applications include insomnia support, dementia care, and low-volume listening contexts. This document provides a timestamped record of authorship and is shared to support further dialogue, ethical development, and responsible application across research, clinical, and consumer technology domains.