Appendix M - Airport Noise Sensitive Activities Appendix M Airport Noise Sensitive Activities 1. Buildings shall be designed to reduce the effects of aircraft noise in the internal environment in accordance with the table below. Nothing in the table shall preclude a building form having openings (e.g. windows) provided the attenuation of aircraft noise levels are achieved when the building is in a normally closed condition. Indoor Design Sound Levels Building Type and Activity Indoor Design and Sound Level Lmax dBA Ldn dBA Residential units Sleeping areas 55 40 Other habitable areas 65 50 Travellers’ accommodation Relaxing or sleeping 55 40 Conference meeting rooms 55 40 Services activities 75 60 Education activities Libraries, study areas 55 40 Teaching areas, assembly areas 55 40 Workshops, gymnasia 75 60 Commercial activities, services and offices Conference 55 40 Private Offices 60 45 Drafting, open offices, exhibition spaces 65 50 Typing, data processing 70 55 Shops, supermarkets, showrooms 75 60 Health care facilities, day care facilities, rest homes, hospitals Sleeping areas 55 40 Other habitable areas 65 50 App M - 1