This invention is a device and method to reduce snoring that: is wearable, self-contained, and largely energy self-sufficient and enables iterative adjustment of airflow characteristics to reduce soft tissue vibration. It is also well-suited to being remotely controlled by the snoring persons bed partner. This invention may be embodied as a device that includes: an airflow-constraining member that directs, reduces, or blocks respiratory airflow during sleep an airflow channel that allows airflow through or past the airflow-constraining member and an airflow-adjusting mechanism that enables adjustment of one or more airflow characteristics of airflow through the airflow channel in order to reduce or prevent vibration of soft tissue along the persons airway that causes snoring.