Patient presents with severe hearing loss. For the amount of decibel loss he has, which of the following sound can be heard by him?
WHO CLASSIFICATION Till 25 dB Hz Normal 26 - 40 dB Hz Mild 41 - 60 dB Hz Moderate 61 - 80 dB Hz Severe Over 81 dB Profound Source Decibels Anything on the verge of being Audible 0 Whisper 30 Normal conversation 60 Busy traffic 70 Niagara Falls 90 Train 100 Construction noise 110 Rock conce 120 Machine gun 130 Jet take off 150 Rocket take off 180
Rustling of leaves
Sta of car engine at 10 feet
Sound of Niagara falls
Noisy environment night street
Physiology of Hearing