T-Level 2.9 Acoustics Principles

What is the term used to describe the persistence of sound in a particular space after the original sound is removed?

• Frequency

• Reverberation

• Echo

• Resonance

Which of the following factors does NOT directly affect the acoustics of a building?

• The material of the walls

• The color of the walls

• The shape of the room

• The size of the room

What is the unit of measurement for sound level?

• Hertz (Hz)

• Decibels (dB)

• Watts (W)

• Joules (J)

What does the term "frequency" refer to in the context of acoustics?

• The speed of sound

• The loudness of sound

• The pitch of sound

• The duration of sound

What phenomenon occurs when the frequency of sound waves matches the natural frequency of vibration of an object, causing it to vibrate?

• Echo

• Reverberation

• Resonance

• Focusing

What is the term for the reflection of sound waves in such a manner that they converge at a point, leading to an increase in sound intensity?

• Diffraction

• Focusing

• Refraction

• Dispersion

Which of the following is NOT a method to control reverberation in a building?

• Adding soft materials to the walls

• Increasing the volume of the room

• Using heavy curtains and carpets

• Painting the walls with a brighter color

What is an echo?

• The persistence of sound after the sound source has stopped

• The increase in sound intensity due to focusing

• The reflection of sound waves from a surface back to the listener

• The vibration of an object at its natural frequency due to external sound

What is the typical frequency range of human hearing?

• 20 Hz to 20,000 Hz

• 50 Hz to 15,000 Hz

• 100 Hz to 10,000 Hz

• 20 Hz to 15,000 Hz