Fig. (12) Illustration of the effect of changing the signal amplitude control scroll bar in the Spectrogram16 program. Top: Signal amplitude control set to around one-third of full scale. Bottom: Signal amplitude control increased to a little over one-half of the full scale. In both cases, the acoustic signal under evaluation is the recording from a Laryngeal Mask Airway (LMA), as shown earlier in Fig. (10). Note also that the image in Fig. (10) is taken with even more sensitivity than shown here.