The harmful effects of noise in a children's ward.

Because of concerns frequently expressed by members of staff about the annoyance caused by noise in a children's ward, noise levels were measured. These confirmed that ambient and peak levels were well in excess of levels recommended for hospital wards and were often above those recommended for average outdoor situations. The harmful effects of noise in general are discussed with regard to annoyance and the effects on hearing, performance, accident rates, social relationships and sleep. Interviews with members of ward staff confirmed a high degree of worry about noise levels and revealed that machines for ward cleaning were the most annoying noise source, followed by the crying of infants. Patients and parents probably suffer similar annoyance and distress from noise. Possible harmful effects on patients are discussed and measures to reduce noise levels in wards are suggested.