Math

QuestionAn airport worker uses ear mufflers due to airplane engine sounds being more than 120 decibels. What is the sound level?

Studdy Solution

STEP 1

Assumptions1. The decibel (dB) is a unit of measurement used to express the intensity of a sound wave. . Sound waves below0 decibels are essentially inaudible to the human ear.
3. Sound waves between9 and120 decibels range from very quiet sounds (like a whisper) to very loud sounds (like a rock concert).
4. Sound waves greater than120 decibels are extremely loud and can cause immediate harm to the ear, leading to hearing loss.
5. The frequency of a sound wave is measured in hertz (Hz), not decibels.

STEP 2

The question is asking why an airport ground crewman wears ear mufflers. We know that ear mufflers are used to protect the ears from loud noises. Therefore, we can eliminate options a and b because they represent sound levels that are either inaudible or within the normal range of human hearing.

STEP 3

Option d is also incorrect because it refers to the frequency of the sound wave, not its intensity. Frequency determines the pitch of a sound, not its loudness.

STEP 4

By process of elimination, the correct answer is option c. The sound waves produced by an airplane's engine are greater than120 decibels, which is why the airport ground crewman wears ear mufflers to protect his ears.
The answer is c. greater than120 decibels.

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