Figure 5
From: An investigation of sound levels on intensive care units with reference to the WHO guidelines
Frequency plot for 24 hours at John Radcliffe Hospital ICU. Frequency components of the noise adjacent to a patient at the John Radcliffe Hospital Adult ICU on a weekday at the quietest period (4:00 AM to 5:00 AM) and during working hours (4:00 PM to 5:00 PM).