Swallowing accelerometry signal feature variations with sensor displacement

Highlights • First study to systematically evaluate the effect of positional offsets of sensor location on dualaxes swallowing accelerometry signals. • Sensor can be displaced 4 mm inferior to and 6 mm superior to the baseline position (midline on neck, below thyroid cartilage) without significantly altering time-frequency signal features. • Sensor can be displaced 4 mm lateral to the baseline position without significantly altering timefrequency signal features. • Time-frequency features are more robust to positional offsets of sensor than time domain and frequency domain features. • Classification of swallowing conditions based on swallow accelerometry should consider time-frequency features if positional robustness of sensor placement is important.