Understanding Sound Concepts

Which of the following best defines sound?

• A type of electromagnetic wave

• A form of thermal energy

• Mechanical vibrations that travel through a medium

• Electric current in a conductor

What physical quantity determines the pitch of a sound?

• Amplitude

• Wavelength

• Frequency

• Speed

The decibel scale is:

• Linear

• Exponential

• Logarithmic

• None of the above

The unit of sound intensity is:

• Hertz

• Newton

• Pascal

• Watt per square meter

What instrument is used to measure sound intensity levels?

• Thermometer

• Barometer

• Sound level meter

• Oscilloscope

Which type of wave is a sound wave in air?

• Transverse

• Longitudinal

• Electromagnetic

• Surface

What is the typical speed of sound in air at room temperature?

• 150 m/s

• 343 m/s

• 1000 m/s

• 3000 m/s