Voice disorder can significantly affect the quality of life, especially in adults. Functional dysphonia and laryngeal reflux are the most common types of voice disruptions in adults. There are various ways of treating vocal pathology, from surgeries to speech treatment. Usually, clients are first advised speech treatment which has two categories – direct and indirect. Direct treatment is oriented towards direct manipulation of speech mechanisms of voice production, whereas indirect treatment affects voice production through modification of cognitive, behavioral, psychological, and physical conditions.During the process of identifying the appropriate type of treatment, the clinician needs to take into consideration not only the needs of a client but also the scientific proofs of its efficiency. Resonant speech treatment is one of the most prominent among the most commonly used types of speech treatment. This practice is directed to the production of resonant voice, which lowers phonation pressure on the vocal cords. This way, the chance of vocal injury is smaller. The resonant voice is defined as light and vibrant vocal production on the facial area, which is a consequence of manipulation of the vocal tract and interaction between the source and the filter of sound.The physiology of resonant voice production involves minimal adduction and light abduction of vocal cords, which facilitates faster phonation efficiency with weaker vocal strain. Despite various types of resonant treatment and methods used in the process, all of them emphasized production, which includes frontal tone and vibrational oral sensations. Due to that, the majority relies upon physical sensations during the acquisition of specific resonant techniques. The most known techniques of resonant voice training are: Lessac-Madsen resonant therapy, humming method, Y-Buzz, the resonance tube method, Chant talk. Lessac – Madsen therapy corresponds to resonant voice treatment. It is a holistic approach that is directed to all three subsystems of vocal production: phonation, breathing, and resonance. The maximum training efficiency is being accomplished through the task hierarchy, vocal hygiene scheme, and program of post-therapeutic voice care. The positive outcomes of this type of therapy include enhanced voice quality, vibration and vocal closure, speech flexibility, strain during phonation, and functional communication. Semi-occluded vocal tract exercises, which include non – verbal stimuli, share the same characteristics with resonant speech treatment. The efficiency of this type of speech therapy has been confirmed by numerous research within the area of dysphonia of different etiology. That upholds its wide implementation for clinical purposes. This paper aims to provide an overview of the former understandings about resonant voice and resonant therapies. All characteristics of resonant voice will be described, as well as the background mechanisms in its production. The paper will clarify the terminology and provide a preview of the resonant therapeutic procedure and display relevant research on its efficiency.