What is the threshold for ear drum rupture?

What is the threshold for ear drum rupture?

• A. 0 dB
• B. 65 dB
• C. 160 dB
• D. 120 dB

Answer: (C)

The level at which the eardrum (tympanic membrane) can rupture is determined by the mechanical stress from an extremely strong sound pressure wave. When the external pressure skyrockets to around 160 dB SPL, the force across the membrane becomes large enough to tear it, causing rupture. Below this, particularly at levels like 0 dB (barely audible), 65 dB (normal conversation), or even 120 dB (painful but usually not enough to rupture), the tympanic membrane tends to vibrate without tearing. The 160 dB figure represents a threshold for a catastrophic, impulsive acoustic event—things like nearby explosions or very powerful blasts—where rupture is possible.

The level at which the eardrum (tympanic membrane) can rupture is determined by the mechanical stress from an extremely strong sound pressure wave. When the external pressure skyrockets to around 160 dB SPL, the force across the membrane becomes large enough to tear it, causing rupture. Below this, particularly at levels like 0 dB (barely audible), 65 dB (normal conversation), or even 120 dB (painful but usually not enough to rupture), the tympanic membrane tends to vibrate without tearing. The 160 dB figure represents a threshold for a catastrophic, impulsive acoustic event—things like nearby explosions or very powerful blasts—where rupture is possible.