Acoustics and Sound Behavior
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Questions and Answers

What determines the overall effect on loudness in a room?

  • The shape of the room
  • Reflection of sound waves
  • Absorption present within the room (correct)
  • The type of music being played
  • What is the term for the prolongation of sound in a room?

  • Reverberation (correct)
  • Absorption
  • Echo
  • Resonance
  • What is the maximum reverberation time for clear speech?

  • 3 seconds
  • 4 seconds
  • 2 seconds (correct)
  • 1 second
  • What type of music is best suited to a reverberation time of 1-1.5 seconds?

    <p>Chamber music</p> Signup and view all the answers

    What happens to an echo in a highly reverberant room?

    <p>It gets lost in the general reverberation</p> Signup and view all the answers

    What is the ideal reverberation time for classrooms or lecture spaces?

    <p>Below 1 second</p> Signup and view all the answers

    What is the primary factor that determines the loudness of direct sound waves to a listener?

    <p>The loudness of the original source</p> Signup and view all the answers

    What happens to the direction of travel of a sound wave when it strikes a surface?

    <p>It changes direction</p> Signup and view all the answers

    What is the speed of sound waves?

    <p>768 miles per hour</p> Signup and view all the answers

    What are the two effects of multiple reflections of sound waves on acoustics?

    <p>Increased loudness and reverberation</p> Signup and view all the answers

    Why is the loudness of reflected sound always less than direct sound?

    <p>Reflected sound travels further and loudness diminishes with distance</p> Signup and view all the answers

    What determines the loudness of reflected sound?

    <p>Distance from the source and room absorption</p> Signup and view all the answers

    What is the minimum interval required to easily distinguish an echo in a room with low reverberation time?

    <p>1/2 second</p> Signup and view all the answers

    What type of surfaces produce very annoying echoes due to their focusing action?

    <p>Concave surfaces</p> Signup and view all the answers

    What percentage of sound is absorbed by hard, reflective, nonporous interior building surfaces?

    <p>2% to 5%</p> Signup and view all the answers

    What is the unit of sound absorption equivalent to one square foot having a coefficient of absorption of 1.00?

    <p>Sabin</p> Signup and view all the answers

    What is the frequency at which the absorption coefficient of a concrete floor is measured in the example?

    <p>500 Hz</p> Signup and view all the answers

    How many sabins would a 10,000 square feet concrete floor with an absorption coefficient of 0.015 at 500 Hz yield?

    <p>150 sabins</p> Signup and view all the answers

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