ANSI-S12.54 › Complete Document History
Acoustics - Determination of sound power levels and sound energy levels of noise sources using sound pressure - Engineering methods for an essentially free field over a reflecting plane

Complete Current Edition:
   2011 R20 EDITION - REAFFIRMED IN 2020 - June 19, 2020

Obsolete Revision Information:
   2011 R16 EDITION - REAPPROVED IN 2016 - Feb. 25, 2016
   2011 EDITION - Engineering methods for an essentially free field over a ref - Jan. 1, 2011
   1999 EDITION - REAPPROVED IN 2004 - Oct. 18, 1999