<prompt> WHO recommendation cut off for noise in industrial city:70 dB60 dB45 dB120 dB  <response>: WHO Guidelines for Noise Exposure Specific Environment Critical Health Effects LA eq Time base LA Max fast 1 Outdoor Living area Serious annoyance daytime and evening.Moderate annoyance daytime evening. 55 50 16 16 - - 2 Dwelling, Indoors Inside bed rooms Speech intelligibility moderate annoyance.Sleep disturbance, night time. 35 30 16 8 45 3 Outside bedrooms Sleep disturbance, window open. 45 8 60 4 School classroom Speech intelligibility disturbance of information extraction, message communication. 30 During class - 5 School playground Annoyance 55 During play - 6 Hospital wards, rooms indoors Sleep disturbance night time. Sleep disturbance day time. 30 30 16 8 40 - 7 Industrial, commercial, shopping traffic areas Hearing impairment 70 24 110 8 Ceremonies festivals events Hearing impairment 100 4 110 9 Headphones Hearing impairment free - field values 85 1 110 