Normal voice heard from 1 meter, intensity of sound reaching ear is –
Correct Answer: 60 dB
Description: Normal conversation produces 60-70 dB. Whisper 20-30 dB. Mechanical damage at 150-160 dB REF. PARK'S TEXTBOOK OF PREVENTIVE AND SOCIAL MEDICINE 22nd EDITION. PAGE NO - 688
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Social & Preventive Medicine
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