Classification of noise
There are many concepts related to decibels. What you're asking about is likely the physical quantity that measures sound intensity. Hearing loss is typically assessed using pure tone audiometry at 500, 1000, and 2000 Hz. For normal individuals, hearing range usually falls between 0 and 25 decibels (dB).
According to the World Health Organization's criteria for deafness:
26–40 dB: Mild hearing loss Â
41–55 dB: Moderate hearing loss Â
56–70 dB: Moderate to severe hearing loss Â
71–90 dB: Severe hearing loss
Volume analogy:
190 dB: Can cause death
140 dB: The highest critical point defined by the EU that causes complete hearing loss
139 dB: The shouts of Schalke fans
130 dB: Rocket launch sound
125 dB: Jet plane taking off sound
120 dB: Temporary deafness occurs if you stay in this environment for more than a minute.
110 dB: Propeller plane takeoff sound, rock concert sound
105 dB: Permanent hearing loss
100 dB: Pneumatic drill sound, heavy hammering
90 dB: Noisy bar ambient sound, electric saw cutting wood
85 dB and below: Will not damage hair cells in the cochlea
80 dB: Noisy office, highway traffic noise
75 dB: Human ear comfort limit
70 dB: Street environment sound
50 dB: Normal conversation sound
20 dB: Whispering
According to the hearing of ordinary people:
0–20 dB: Very quiet, almost imperceptible;
20–40 dB: Quiet, like a whisper;
40–60 dB: Average, typical indoor conversation;
60–70 dB: Noisy, potentially harmful to nerves;
70–90 dB: Very noisy, can damage nerve cells. Â
90–100 dB: Increased noise level leading to hearing loss; Â
100–120 dB: Unbearable, staying for a minute may cause temporary hearing loss.
Above 120 dB: Extremely loud or completely deafening.
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