What technique uses sensors placed over the face to measure airflow during speech?

The technique that utilizes sensors placed over the face to measure airflow during speech is the pneumotachograph. This device is designed to assess the airflow dynamics by measuring the rate and volume of air movement during phonation, which is critical for understanding various aspects of speech production and respiratory function. By placing sensors around the mouth and nose, the pneumotachograph can accurately capture the flow characteristics of air as it moves during speech, allowing researchers and clinicians to gather valuable data about vocal function and respiratory mechanics.

This technique is particularly useful in speech science and medical assessments, as it provides insights into how effectively airflow is managed during the production of speech sounds. By analyzing changes in airflow, speech professionals can better understand speech disorders and develop targeted treatments or interventions.