doctorVOX Voice Therapy Devices are used for the care and development of voice professionals, and the treatment of voice disorders. DoctorVox Therapy Method is a direct technique with a holistic and cognitive approach that gives multichannel biofeedback. Singers working with the DoctorVox Method immediately produce better quality voices since they use the help of physics the moment they start bubbling. DoctorVox System allows using the voice in a natural, safe, and effective way. By Voice-Mask Advanced Set, the user can adjust the backpressure to the desired level by T-Valve. Also, in this set, there is a MouthPiece with an ergonomic design that helps the user better phonation.