A sound louder than ___ dB is considered potentially damaging.

A sound louder than ___ dB is considered potentially damaging.

• A. 60
• B. 100
• C. 80
• D. 140

Answer: (A)

Sound exposure damage depends on both how loud something is and how long you’re exposed to it. In safety guidance, you don’t usually get harm from normal conversation levels, but as the level rises, the risk grows with time. Around 85 dB is a common limit for long-term exposure; the louder it gets, the shorter the time you should be exposed without protection. Very loud sounds—around 120 dB and above—can cause damage almost immediately, with 140 dB being near the pain threshold and capable of causing permanent harm in an instant. So, among the given numbers, 60 dB is a level well within normal, everyday listening and not typically damaging. The higher end, 140 dB, represents a level that is potentially damaging right away, while 100 dB or 80 dB would require shorter exposure or more context to determine damage risk. The key idea is that risk increases with both loudness and duration, and the loudest end of the scale carries the highest immediate danger.

Sound exposure damage depends on both how loud something is and how long you’re exposed to it. In safety guidance, you don’t usually get harm from normal conversation levels, but as the level rises, the risk grows with time. Around 85 dB is a common limit for long-term exposure; the louder it gets, the shorter the time you should be exposed without protection. Very loud sounds—around 120 dB and above—can cause damage almost immediately, with 140 dB being near the pain threshold and capable of causing permanent harm in an instant.

So, among the given numbers, 60 dB is a level well within normal, everyday listening and not typically damaging. The higher end, 140 dB, represents a level that is potentially damaging right away, while 100 dB or 80 dB would require shorter exposure or more context to determine damage risk. The key idea is that risk increases with both loudness and duration, and the loudest end of the scale carries the highest immediate danger.