Sound Transmission Class (STC) Ratings Quiz
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Questions and Answers

What does STC stand for?

  • Acoustic Insulation Rating
  • Sound Reduction Index
  • Sound Transmission Class (correct)
  • Noise Attenuation Coefficient

    • What does a higher STC number indicate?

  • More effective sound insulation (correct)
  • Less effective sound insulation
  • No impact on sound insulation
  • Inconsistent impact on sound insulation

    • What is the equivalent rating used outside the US?

  • ISO Sound Reduction Index (SRI) (correct)
  • Global Acoustic Insulation Measure (GAIM)
  • International Noise Attenuation Standard (INAS)
  • Worldwide Sound Transmission Class (WSTC)

    • What are the two most basic principles to improve the STC of a partition?

    <p>Adding mass and increasing overall thickness</p> Signup and view all the answers

    What standard provides the STC rating?

    <p>ASTM E413 based on laboratory measurements performed in accordance with ASRM E90</p> Signup and view all the answers

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