Understanding Sound Intensity and Decibels

What happens to the intensity of sound as you move further away from the source?

• It remains the same.

• It increases.

• It fluctuates randomly.

• It decreases.

How is sound intensity mathematically related to power and area?

• Intensity equals area divided by power.

• Intensity equals power times area.

• Intensity equals power plus area.

• Intensity equals power divided by area.

What is the threshold of human hearing in terms of intensity?

• 10 watts per meter squared

• 10 to the negative 6 watts per meter squared

• 1 watt per meter squared

• 10 to the negative 12 watts per meter squared

What does an increase of 10 decibels represent in terms of intensity?

• No change in intensity

• A hundredfold increase in intensity

• A tenfold increase in intensity

• A doubling of intensity

If a sound has an intensity level of 0 decibels, what is its intensity in watts per meter squared?

• 10 to the negative 12

• 10 to the negative 11

• 10 to the negative 10

• 10 to the negative 13

How much greater is the intensity of a sound at 20 decibels compared to 0 decibels?

• 50 times greater

• 100 times greater

• 10 times greater

• 20 times greater

What is the intensity level in decibels if the intensity is 10 to the negative 10 watts per meter squared?

• 10 decibels

• 20 decibels

• 30 decibels

• 40 decibels

In the example problem, what is the intensity level at 100 meters if it is 80 decibels at 10 meters?

• 60 decibels

• 70 decibels

• 80 decibels

• 90 decibels

How does the intensity change when the distance from the sound source is increased tenfold?

• It becomes 10 times lower.

• It becomes 100 times greater.

• It becomes 100 times lower.

• It becomes 10 times greater.

What is the relationship between distance and intensity in the context of sound?

• Intensity is directly proportional to distance.

• Intensity is inversely proportional to the square of the distance.

• Intensity is directly proportional to the square of the distance.

• Intensity is inversely proportional to distance.