Sound：練習題

Which of the following statements correctly describes a characteristic of sound waves?

A sound wave travelling through air at \(340\text{ m/s}\) has a frequency of \(680\text{ Hz}\). What is its wavelength?

The speed of sound is typically highest in solids, intermediate in liquids, and lowest in gases. Which fundamental property best explains why sound travels fastest in solids?

What type of wave is sound?

Which statement correctly describes the nature and transmission requirement of sound waves?

State the approximate range of frequencies audible to a healthy human ear and name the type of sound that has a frequency above this range.

If a sound wave's amplitude is doubled while its frequency is halved, how would the perceived loudness and pitch of the resulting sound change?

A ship uses ultrasound to map the ocean floor. If the total time measured between the pulse emission and the echo reception is \(0.80\text{ s}\), and the speed of sound in seawater is \(1540\text{ m/s}\), calculate the depth of the ocean floor below the ship.

(a) Describe how a sound wave is produced and transmitted through air. Explain the difference between a compression and a rarefaction in a longitudinal wave.

(b) A student attempts to determine the speed of sound in air by standing a distance \(d\) from a large vertical wall and clapping loudly. She measures the time \(t\) until she hears the echo.

If the distance \(d\) is \(102 \text{ m}\) and the measured time \(t\) is \(0.60 \text{ s}\), calculate the speed of sound in air.