Table 1.

Summary of the measured aerosol number and mass concentrations from different expiratory activities for children and adults. Number concentration (in cm⁻³) data correspond to the series of expiratory activities plotted in figure 3a, and mass concentration (in µg m⁻³) data correspond to the series of expiratory activities plotted in figure 3b. The number of participants for each activity is given for both the children and the wider cohort of adults.

	parameters	activities
		breathe		speak 70–80 dBA		sing 70–80 dBA		sing single note 70–80 dBA
		children	adults	children	adults	children	adults	children	adults
particle number concentration (cm−3)	mean	0.029	0.069	0.20	0.16	0.40	0.55	0.31	0.62
	median	0.029	0.060	0.21	0.18	0.41	0.53	0.36	0.87
	25%	0.02	0.026	0.16	0.096	0.30	0.36	0.23	0.46
	75%	0.046	0.17	0.26	0.28	0.77	0.86	0.58	1.3
	bottom whisker	0.0072	0.0020	0.10	0.018	0.053	0.12	0.042	0.0072
	top whisker	0.13	3.3	0.36	1.7	1.2	2.0	0.95	2.4
	n	18	117	18	118	18	41	18	32
particle mass concentration (µg m−3)	mean	0.025	0.057	0.48	0.23	1.2	1.1	0.75	0.99
	median	0.023	0.055	0.49	0.23	1.7	1.2	0.78	1.5
	25%	0.011	0.019	0.31	0.13	0.51	0.73	0.45	0.62
	75%	0.050	0.18	0.84	0.42	3.1	1.9	2.1	2.5
	bottom whisker	0.0022	0.00050	0.14	0.0098	0.10	0.13	0.033	0.0043
	top whisker	0.21	8.4	1.2	9.1	6.8	12	3.7	5.7
	n	18	117	18	118	18	41	18	32