Sound Absorption Quiz

What is sound absorption?

• The process by which sound is amplified

• The process by which sound is reflected

• The process by which sound is not reflected and is absorbed

• The process by which sound is transmitted through a vacuum

Is there any material that is a perfect reflector or absorber of sound?

• Yes, many materials are perfect reflectors

• Yes, many materials are perfect absorbers

• No, no material is a perfect reflector or absorber

• Yes, but only at certain frequencies

Refer to the diagram showing sound interaction with acoustic absorbent material only. What is the result of sound interacting with only acoustic absorbent material?

• Strong reflection and weak transmission

• Weak reflection and strong transmission

• Strong reflection and strong transmission

• Weak reflection and weak transmission

What does reverberation define in a space?

• The color scheme of the space

• The size of the space

• The "Live" or "Dead" characteristics of the space

• The temperature of the space

Should spaces for speaking have more or less reverberation compared to musical venues?

• More reverberation

• Less reverberation

• The same amount of reverberation

• No reverberation at all

Which event generally requires the shortest reverberation time according to the graph?

• Religious music

• Symphonic music

• Jazz and chamber music

• Speech

What is the room considered when ΣA equals 1.0?

• Excessively live

• Excessively dead

• Average

• Anechoic

According to the inverse square law, how does a sound wave behave as it continues to travel?

• It maintains constant intensity.

• It increases in intensity.

• It dissipates in intensity.

• It oscillates in intensity.

What is the characteristic of absorptive materials used for noise reduction?

• They are typically reflective on a micro scale

• They are usually solid and non-porous

• They are typically porous on a micro scale

• They convert sound into light

What adds directivity (clarity or definition) to the music at upper frequencies?

• Long reverb time

• Short reverb time

• High frequencies

• Low frequencies