Which device is used to measure chest wall displacement during respiration measures?

The device used to measure chest wall displacement during respiration is the strain belt. This device applies a belt around the chest that can detect changes in circumference as the chest expands and contracts during breathing. Strain belts are particularly effective for monitoring respiratory mechanics as they provide continuous data on how the thoracic cavity changes with inhalation and exhalation.

Pneumotachographs are primarily used to measure airflow and the rate of breathing rather than chest wall movement. They do this by determining how fast air is moving in and out of the lungs, often based on pressure differences.

Electronic transducers convert physical quantities into signals that can be measured and recorded, but they do not specifically target chest wall displacement measurement in the context of respiratory monitoring.

Electromagnetic articulography is a technology used to track the movement of speech articulators with electromagnetic sensors, making it irrelevant for measuring chest wall displacement during respiration.

Thus, the strain belt is specifically designed to provide accurate measurements of chest wall changes occurring during the respiratory cycle.