Noise levels in a burn intensive care unit

Area of Science:

• Critical Care Medicine
• Environmental Health
• Acoustics

Background:

• Elevated hospital noise is linked to patient stress and sleep deprivation.
• World Health Organization (WHO) guidelines recommend noise levels below 35 dB(A) during the day and 30 dB(A) at night.
• No prior studies quantified noise levels in burn units.

Purpose of the Study:

• To quantify ambient noise levels in a burn intensive care unit.
• To assess compliance with established noise level guidelines.
• To identify potential noise-related insults to patients.

Main Methods:

• Ambient noise levels were measured using an A-weighted sound pressure level meter.
• Measurements were taken at 30-minute intervals over 10 days within a 1-month period.
• Data included maximum and minimum sound pressure levels during shift changes, day, and night.

Main Results:

• Mean dB(A) LEq values ranged from 60.9 ± 5.2 (night) to 65.9 ± 2.8 (shift changes).
• No significant differences in maximum or minimum sound pressure levels were found between shift changes, day, or night.
• Sound pressure levels inside and outside patient rooms showed no significant difference.

Conclusions:

• Mean equivalent continuous sound levels in the burn unit significantly exceed WHO, NIOSH, and EPA recommendations.
• Noise levels were consistently higher than recommended guidelines, regardless of time or location.
• Developing guidelines to decrease noise exposure is crucial for mitigating adverse effects on patients, visitors, and staff.