To conduct her research, Angélique Remacle used a voice dosimeter that was recently acquired by the Liège University Hospital's ENT department. It’s an innovative device mainly/essentially limited to research purposes because of its high cost, which measures subjects’ vocal load. It doesn't record speech but rather vocal cord vibrations, in order to quantify the subject's voice use during an entire workday in their natural environment. An accelerometer  was attached to the front part the subject's neck (see photo) in order to determine when and how often she spoke, at what frequency level (high or low pitch) and what intensity (did she speak loudly or softly). The duration, intensity, and frequency of phonation are the three main parameters in vocal loading. The higher the vocal load, the more the work accomplished by the vocal folds will be important. And if the vocal folds tissue's ability to recover is inadequate, injury may occur. The most frequent problems among teachers are vocal cord nodules, which modify voice quality; induces vocal fatigue; or even periods of aphonia. To alleviate symptoms, speech therapy is generally recommended in order to teach patients about good vocal hygiene and help them correct their bad habits. However, when the vocal cords have been severely damaged, therapy alone isn't enough and must be coupled with surgery performed by an ENT specialist or a laryngologist.