Vocolair™ is the first and only speaking valve engineered specifically for ventilator use. ​Vocolair™ leverages controlled fluidic resistance and flow path geometry to influence the direction of exhaled gas. When the cuff is deflated, the relative resistance across the device compared to the upper airway results in preferential redirection of exhaled flow through the upper airway, enabling phonation. When the cuff is inflated, the upper airway is isolated and the device presents minimal resistance, allowing normal bidirectional ventilator flow.