reflux laryngitis  inflammation of the larynx due to irritation from gastric juice

registers  Weakly defined term for vocal qualities; often, register refers to a series of adjacent tones on the scale that sound similar and seem to be generated by the same type of vocal fold vibrations and vocal tract adjustments. Examples of register are vocal fry, modal, and falsetto; but numerous other terms are also used

resonance  A spontaneous reinforcement and amplification of tonal vibrations which occurs when the oral cavity is “tuned” to the natural frequency of the pitch being sounded by the vibrating vocal folds

resonator  With regard to the voice, refers primarily to the supraglottic vocal tract, which is responsible for timbre and projection