Three boxes produce a voice.
What Are R1, R2, and R3 and How Do They Affect Your Voice Sound?
What is R1?
Within the vocal mechanism, there are different areas where the voice will resonate, or ‘vibrate.’ The term R1 refers to the resonance area containing the laryngeal space (located inside your neck where your voice box is) and the pharyngeal space (located in the back of the throat). R1 is often called the primary gender control knob, and it will be the most decisive factor in the feminization of the voice.
R2 is a pharyngeal box.
R2 can create the widest range of possible frequencies (low –sounding pitch). This means that R2 can produce a wide range of sounds, making it an important area to understand in mtf and ftm trans voice training.
R3 is primarily controlled in the area between the tongue apex (tip of the tongue) and the teeth and lips. While this resonance chamber will usually produce sounds in the high end of the frequency spectrum, it can drop much lower when the tongue is in retroflexion.
