Radiated spectra of a real clarinet measured in anechoic conditions played at a forte level. Portions of the first (E3–E4), second (B4-A♯5), and third (D6-A♯6) registers are plotted from top to bottom. Raw data depicted by dark grey and light grey circles, plus their moving average by black and red lines, for odd and even harmonics, respectively. Data accessed through a publicly available data base [28].