Edinburgh Napier University

  This technical report outlines an ethical framework for adaptive sound feedback systems grounded in behavioural consent, emotional tone sensitivity, and user autonomy. It introduces novel concepts including passive consent loops, quiet mode, tone mismatch scoring, and localised cue adaptation logs. These mechanisms support respectful, non-coercive interaction while remaining accessible and privacy-conscious. Designed to operate on edge-computing principles without cross-user data sharing, the framework applies to personal devices, shared environments, and future multimodal interfaces. This work is offered as a practical reference for designers, accessibility advocates, and HCI researchers.