MCQ Detailed View

Sound is a form of energy that travels in waves and is measured in decibels (dB). The decibel scale is logarithmic, meaning that each increase of 10 dB represents a tenfold increase in intensity. Human ears are highly sensitive to sound, but they can only tolerate certain limits without damage.

For normal conversation, the sound intensity level is around 60 dB. Sounds above 85 dB may cause gradual hearing damage if exposure is prolonged. However, sudden or extremely loud sounds — especially those reaching around 160 dB — can cause immediate physical damage to the inner structures of the ear, including the eardrum.

At approximately 160 dB, the pressure created by the sound waves is so high that it can rupture the thin membrane of the eardrum. This is not just discomfort — it’s a medical emergency. This kind of sound intensity can come from explosions, jet engines at close range, or high-powered firearms.

Now let’s analyze the options:

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  Option A: 20 dB is very low — close to a whisper.

  
  


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  Option B: 60 dB is normal conversation.

  
  


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  Option C: 100 dB is loud, but not typically enough for eardrum rupture.

  
  


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  Option D: 160 dB is extremely loud and can physically tear the eardrum.

  
  

In conclusion, sounds around 160 dB are intense enough to damage or rupture the eardrum. This MCQ helps students understand the practical consequences of high-decibel environments and highlights the importance of hearing protection.