Samuel is trying to hear what is being said on the other side of the door, but the sound of the voices has to pass through a thin door. The sound travels at a velocity of 343 m/s through air, and 560 m/s through the door. How does the frequency and wavelength of the man's voice traveling through air compare to it traveling through the door? Choose the 2 that BEST describe the two characteristics in this eavesdropping scenario.

Question

(1 point)
Responses

The frequency of the voice sound wave traveling through the air is the same as when it travels through the door.
The frequency of the voice sound wave traveling through the air is the same as when it travels through the door.

The frequency of the voice sound wave traveling through the air is faster than when it travels through the door.
The frequency of the voice sound wave traveling through the air is faster than when it travels through the door.

The frequency of the voice sound wave traveling through the air is slower than when it travels through the door.
The frequency of the voice sound wave traveling through the air is slower than when it travels through the door.

The frequency of the voice sound wave changes with the distance the speaker is from the door. It decreases as it travels across the air in the room.

Answer 1

The two characteristics that BEST describe how the frequency and wavelength of the man's voice traveling through air compare to it traveling through the door are:

1. The frequency of the voice sound wave traveling through the air is the same as when it travels through the door.

   • This is true because the frequency of a sound wave is determined by the source of the sound and does not change as the sound wave travels through different media.

2. The frequency of the voice sound wave changes with the distance the speaker is from the door. It decreases as it travels across the air in the room.

   • This statement is actually misleading. The frequency of sound does not change based on the distance from the source; however, the sound intensity may change — it can decrease as it travels farther due to spreading and absorption, but the actual frequency remains constant.

So the first statement is definitely correct, while the second one might create confusion but touches on how sound can diminish with distance. The correct answers focusing strictly on frequency and the change through different media is the first statement only.

Thus, the best answer to select for this scenario is:

• The frequency of the voice sound wave traveling through the air is the same as when it travels through the door.