Actual Conditions of Noises in Wards and Directions of Noise Control

Takayuki Kokubo, Yukiko Yamada, Graduate School
This research was conducted in four hospitals in and around Tokyo. In the wards of each hospital sound levels were measured every 1 second for 24 hours, and the measurement of L Aeq,10min every 30 minutes from getting up to lights-out was also conducted. In addition the questionnaire surveys were conducted on the inpatients and nurses. In some wards the values of L Aeq,10min were sometimes higher than 60 dB. The principal sound sources were conversations, server-wagon movements and water
more » ... ts and water supply. In responding to the questionnaires, many inpatients pointed out that the conversations, medical equipments, sound generated in the same room and ambulance siren etc. were rated as 'unacceptable' noises. From the results of this research, the ward of single-bed room type and the carpet floors were considered effective in noise control.