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Figure 3: Equivalent sound levels (dBA) measured over a ninehour period in a single ward; (a) For every 10 minutes, LAeq-10mins; (b) For every 30 minutes, LAeq-30mins

Figure 3: Equivalent sound levels (dBA) measured over a ninehour period in a single ward; (a) For every 10 minutes, L<sub>Aeq-10mins</sub>; (b) For every 30 minutes, L<sub>Aeq-30mins</sub>