What decibel level is identified as high intensity sound in this context?

• A. 150 decibels
• B. 90 decibels
• C. 120 decibels
• D. 180 decibels

Answer: (A)

Sound intensity is measured in decibels, and higher numbers mean louder, potentially more harmful sounds. High intensity sound in this context refers to levels that can cause immediate damage, not just loudness. A level of 150 decibels fits that description because it represents an extremely loud event—well above typical loud noises and close to the upper end of what can cause rapid ear injury.

For comparison, 90 decibels is loud but common in loud workplaces and not considered “high intensity” in the strict sense; 120 decibels is painful and very intense, yet the context here uses 150 decibels to denote high intensity; 180 decibels is extraordinarily extreme, approaching levels that involve shock effects and are rarely described as simply “high intensity” in standard safety references.

So 150 decibels best matches the idea of high intensity sound in this context.