Improving Sound Transmission in Lightweight Walls
18 Questions
1 Views

Choose a study mode

Play Quiz
Study Flashcards
Spaced Repetition
Chat to lesson

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

What is the primary reason why the sound-reducing property of the air space is negated in lightweight walls?

  • The direct structural connection between the two wall surfaces (correct)
  • The type of gypsum board used
  • The lack of insulation in the stud cavity
  • The use of wood studs

    • What is the potential benefit of using light-gauge steel studs at 24 inches in the center instead of wood studs at 16 inches in the center?

  • Decreased transmission loss
  • Increased sound transmission
  • No impact on sound transmission
  • Less sound energy transmission (correct)

    • What is the estimated STC rating of a wood-framed wall with 3%inch-thick fiberglass acoustical insulation and 2-inch gypsum board on both sides?

  • STC 48
  • STC 42
  • STC 39 (correct)
  • STC 35

    • What is the purpose of using resilient channels in wood-framed assemblies?

    <p>To isolate the materials and raise the STC rating</p> Signup and view all the answers

    What is the estimated STC rating of a steel stud-framed wall with 3%inch-thick fiberglass acoustical insulation and 2-inch gypsum board on both sides?

    <p>STC 48</p> Signup and view all the answers

    Where are resilient channels typically installed in wood-framed assemblies?

    <p>Across the face of the studs</p> Signup and view all the answers

    What is the STC rating of a wood-framed wall with a 6-inch gypsum board on resilient channels spaced at 24 inches vertically?

    <p>STC 48</p> Signup and view all the answers

    What is the effect of adding layers of gypsum board on one or both sides of a wall?

    <p>It provides some increased mass, which can reflect more sound and decrease the amplitude of vibration</p> Signup and view all the answers

    What is the effect of using two layers of 5-inch gypsum board on wood-framed walls with insulation?

    <p>The STC rating increases to 55</p> Signup and view all the answers

    What is the effect of using inch gypsum board instead of -inch gypsum board?

    <p>The STC rating increases by 2-4</p> Signup and view all the answers

    What is the effect of increasing the density of insulation while maintaining a constant thickness?

    <p>The STC rating stays the same</p> Signup and view all the answers

    What is the incorrect assumption about acoustic insulation?

    <p>Higher-density insulation provides better sound transmission loss</p> Signup and view all the answers

    What is the most critical property in a wall cavity for optimal wall performance?

    <p>Complete filling of the cavity between wall surfaces</p> Signup and view all the answers

    What is the primary purpose of using an acoustical sealant in wall construction?

    <p>To fill gaps and prevent sound transmission</p> Signup and view all the answers

    What is a common characteristic of acoustical sealants?

    <p>They retain their acoustic properties over time</p> Signup and view all the answers

    What is a technique used to attenuate airborne sound in ceilings and floors?

    <p>Adding sound absorptive insulation and resilient channels</p> Signup and view all the answers

    What is a common pathway for sound transmission in walls?

    <p>Through electrical outlets and other wall penetrations</p> Signup and view all the answers

    What is similar between wall construction and floor/ceiling joist construction techniques?

    <p>The techniques and performance</p> Signup and view all the answers

    More Like This

    Use Quizgecko on...
    Browser
    Open
    Browser
    Browser