Sound above what level (decibels) are considered hazardous noise pollution?

The correct answer is (d): 120 dB.

Sound is measured in decibels (dB). A whisper is about 30 dB, normal conversation is about 60 dB, and a busy street is about 80 dB. Anything above 85 dB can start to damage your hearing, and anything above 120 dB can cause immediate damage.

Here is a brief explanation of each option:

• (a) 30 dB: A whisper is about 30 dB. This is a very quiet sound that is unlikely to cause any damage to your hearing.
• (b) 100 dB: Normal conversation is about 60 dB. This is a moderate sound that can be harmful if you are exposed to it for a long period of time.
• (c) 80 dB: A busy street is about 80 dB. This is a loud sound that can cause damage to your hearing if you are exposed to it for a long period of time.
• (d) 120 dB: A jackhammer is about 120 dB. This is an extremely loud sound that can cause immediate damage to your hearing.

It is important to protect your hearing from loud noises. If you are exposed to loud noise for a long period of time, you may develop hearing loss. Hearing loss can be permanent, so it is important to take steps to protect your hearing.

Here are some tips for protecting your hearing:

• Wear earplugs or earmuffs when you are exposed to loud noise.
• Avoid using headphones or earbuds at high volumes.
• Take breaks from loud noise if you can.
• Get your hearing checked regularly.