Table 2.

Droplet Concentration (cm⁻³) of the Aerosol Modes during each Expiratory Activity (Morawska et al., 2009) (the last column is added by this paper).

Expiratory activity	D1 (0.80 μm)	D2 (1.8 μm)	D3 (3.5 μm)	D3 (5.5 μm)	Aerosol concentration in exhaled air, mL cm−3
Voiced counting	0.236	0.068	0.007	0.011	1.39 × 10−12
Whispered counting	0.110	0.014	0.004	0.002	3.36 × 10−13
Unmodulated vocalization	0.751	0.139	0.139	0.059	8.89 × 10−12
Breathing	0.084	0.009	0.003	0.002	2.92 × 10−13