Violet has several mouthpieces that she wants to test for comfort and effectiveness. She has chosen the CTI 12" round balloon for its above-average inflation pressure, and a lip-ring spirometer mouthpiece, a trombone mouthpiece, and a tuba mouthpiece. She also blows a fourth balloon without a mouthpiece as a control. Which will her lips prefer?

Violet has several mouthpieces that she wants to test for comfort and effectiveness. She has chosen the CTI 12" round balloon for its above-average inflation pressure, and a lip-ring spirometer mouthpiece, a trombone mouthpiece, and a tuba mouthpiece. She also blows a fourth balloon without a mouthpiece as a control. Which will her lips prefer?