Acoustics Quiz

What type of wave is sound classified as?

• Transverse wave

• Electromagnetic wave

• Surface wave

• Longitudinal wave

Which medium does sound travel fastest in?

• Vacuum

• Solids

• Liquids

• Gases

What is the normal hearing range for humans?

• 0 Hz to 20,000 Hz

• 20 Hz to 20,000 Hz

• 20 Hz to 20,000 kHz

• 0 Hz to 20 kHz

What is the unit of loudness?

• Bel

• Phon

• Hertz

• Decibel

Which type of sound is characterized by regular shape and definite periodicity?

• Ultrasound

• Infrasound

• Musical sound

• Noise

What is the term for the time taken by a sound wave to fall from initial intensity to inaudible intensity?

• Sound pressure time

• Reverberation time

• Intensity time

• Echo time

What is the threshold of audibility for a note of frequency 1000 Hz?

• 0 dB

• 10 dB

• 20 dB

• 30 dB

Which law relates the loudness of a sound wave to its intensity?

• Bernoulli's Principle

• Weber-Fechner Law

• Ohm's Law

• Hooke's Law

What type of sound is defined as inaudible sound with high frequency for humans?

• Ultrasound

• Noise

• Audible sound

• Infrasound

What is the effect called when sound waves reflect off surfaces and create a distinct repetition of sound?

• Reverberation

• Echo

• Diffraction

• Refraction