Sound Theory Quiz 2,1

What happens when a sound wave reflects off a surface boundary?

• It reflects at an angle equal to the initial angle of incidence but in the opposite direction

• It reflects at a different angle

• It continues in the same direction

• It absorbs into the surface

What determines how much energy is reflected back when a sound wave hits a material?

• The speed of the sound wave

• The density and type of the material

• The temperature of the material

• The frequency of the sound wave

What is the function of the Malleus, Incus, and Stapes in the ear?

• To amplify sound vibrations

• To protect against loud transients

• To convert sound waves into electrical signals

• To collect sound pressure waves

How is loudness measured in sound pressure level (SPL)?

• In Amperes (A)

• In decibels (dB SPL)

• In Hertz (Hz)

• In Pascal (Pa)

What is the purpose of using a logarithmic scale to measure loudness?

• To make the values smaller

• To make the values larger

• To increase the precision of the measurements

• To reduce large values into more manageable numbers

What is the Fletcher-Munson curve used to show?

• The amplitude of sound waves

• The speed of sound in different materials

• The sensitivity of the ear to different frequencies at various SPL levels

• The frequency response of the ear

What is the Haas Effect also known as?

• The Interference Effect

• The Precedence Effect

• The Resonance Effect

• The Doppler Effect

What is the term for the continuous stream of reflections happening after 50ms?

• Reverberation

• Diffraction

• Refraction

• Absorption

What is the term for the ability to localise a sound source within an acoustic space?

• Temporal localisation

• Amplitude localisation

• Spatial localisation

• Frequency localisation

What is the Interaural Level Difference (ILD) based on?

• The size of the head

• The shape of the ear canal

• The density of the air

• The speed of sound