Principle of Sound

What is the primary medium through which sound waves travel?

• Vacuum

• Light

• Water

• Air

Which of the following properties of a sound wave determines its pitch?

• Frequency

• Wavelength

• Amplitude

• Velocity

What is the unit of measurement for sound intensity?

• Meter (m)

• Watt (W)

• Decibel (dB)

• Hertz (Hz)

In which medium does sound travel the fastest?

• Vacuum

• Water

• Air

• Steel

What term describes the phenomenon where a sound wave reflects off a surface and returns to its source?

• Diffraction

• Refraction

• Absorption

• Echo