
Tracheal sounds for sleep apnoea diagnosis
In the very last paper [1] published in Breathe (Vol. 13, No. 2, pp. e37-e45) by Thomas Penzel and Abdel Kebir Sabil, they reminded the significant role of tracheal sounds analysis in the process of obstructive sleep apnea (OSA) diagnosis. They went through tracheal sounds in general, then they considered technical aspects of