Figure 5
From: Aerosol emission in professional singing of classical music

Schematic test setup with one person in cleanroom clothing whose exhaled air was recorded by the particle counter. The glass measuring section (gray colored area) was located on the suction side of a horizontally positioned Filter Fan Unit (FFU). All geometric dimensions are in mm (Figure adapted from Fig. 2 in Hartmann et al.26). (Figure created with cairo 1.15.10, http://cairographics.org).