Which technique redirects expiratory airflow from the lungs to the esophagus to produce alaryngeal voice?

The technique that effectively redirects expiratory airflow from the lungs to the esophagus to produce alaryngeal voice is esophageal speech. In this method, a person learns to swallow air and then release it in a controlled manner, which causes vibrations in the esophagus and can produce sound that is articulated into speech.

Tracheoesophageal speech is a different technique, where a puncture between the trachea and esophagus is created, allowing air from the lungs to pass into the esophagus, thus generating voice as well.

Since both esophageal speech and tracheoesophageal speech involve manipulation of airflow and sound generation in a way that allows for alaryngeal voicing, the understanding of these methods is crucial for voice rehabilitation after laryngeal removal. Therefore, recognizing that both techniques have their unique applications in producing an alaryngeal voice is key to selecting the most accurate answer in this context.