Resonance Tube 275 mm Contraalto/Bass

When you do phonation, you massage your vocal cords, which makes them softer and closes more tightly, the sound is better and the range is larger. Resonance tubes or voice tubes are widely used by speech therapists throughout the country and it is also part of the training of speech therapists to get acquainted with phonation. * 280 mm Contraalto/Bass *** This is a glass product and as such it can break during shipping.