<prompt> Acceptable noise levels in bed room40dB35dB20dB25dB  <response>: Acceptable noise levels Expressed in dB A, sound pressure levels conforming to weighting curve A Environment Place Acceptable noise level dBA Residential Bed room 25 Living room 40 Commercial Office 35-45 Conference 40-45 Restaurants 40-45 Industrial Work shop 40-60 Laboratory 40-50 Educational Class room 30-40 Library 35-40 Hospitals Wards 20-35 Ref: Park 25th edition Pgno : 779 