SVC on Twitter    SVC on Facebook    SVC on LinkedIn

 

Pop Quiz: December 2006

Test Your Knowledge of Outdoor Acoustics

TRUE OR FALSE
  • The only place where the inverse square law is truly accurate for calculating sound pressure level (SPL) attenuation is outdoors.
  • When outdoor humidity levels are high, sound transmission will be significantly reduced.
  • The “Doppler Effect” is only heard outdoors.
  • The velocity of sound varies with temperature.
  • ANSWERS

    1. FALSE. An anechoic chamber produces nearly the same effect. However, in most indoor spaces, the presence of sound reflections from surfaces or reverberation will add to the total SPL, thus resulting in less measured attenuation than the inverse square law will predict.

    2. FALSE. Attenuation is actually greater at lower relative humidity levels.

    3. FALSE. The Doppler Effect may be more commonly heard outdoors because it requires either the source or listener to travel a significant distance.

    4. TRUE. The higher the temperature, the faster sound will travel.



    Browse Back Issues
    BROWSE ISSUES
      June 2014 Sound & Video Contractor Cover May 2014 Sound & Video Contractor Cover April 2014 Sound & Video Contractor Cover March 2014 Sound & Video Contractor Cover February 2014 Sound & Video Contractor Cover January 2014 Sound & Video Contractor Cover  
    June 2014 May 2014 April 2014 March 2014 February 2014 January 2014