ARLINGTON HEIGHTS, Ill., July 29, 2024—Air Movement and Control Association (AMCA) International Inc. announces the publication of ANSI/AMCA Standard 300-24, Reverberation Room Methods of Sound Testing of Fans.

Superseding ANSI/AMCA Standard 300-14, ANSI/AMCA Standard 300-24 establishes methods of determining the sound-power levels of fans of all types and sizes. It is limited to the determination of airborne-sound emission for the setup specified in the standard; neither measurement of vibration nor determination of sensitivity of airborne-sound emission to vibration effects is covered.

ANSI/AMCA Standard 300-24 includes a number of substantial changes and numerous minor changes, including:

  • The requirement that new test data be recorded in one-third octave bands.
  • The removal of references to the use of weighting filters.
  • Revised formulas for calculating end reflections aligning with ANSI/AMCA Standard 320-23, Laboratory Method of Sound Testing of Fans Using Sound Intensity.
  • Clarification of requirements for Type E installations (whole-fan test, total discharge, inlet, and cabinet).
  • The changing of the reference-sound-source calibration to the method found in AHRI 250, Performance and Calibration of Reference Sound Sources.
  • The expansion and clarification of the section (7.1) on background-sound corrections.
  • The retitling of Annex B to “Room Qualification: Discrete Frequency” and the clarification of the test procedure within.
  • The addition of an informative annex (D) describing an alternate and simpler procedure for discrete-frequency room qualification.
  • Clarification of the definition of reverberation room.

ANSI/AMCA Standard 300-24 is available in printed and PDF formats. To obtain a copy, click here.

For more information about ANSI/AMCA Standard 300-24, contact Director of Publications and Standards Joe Brooks, PE, at [email protected] or Senior Manager, Publications and Standards Shruti Kohli-Bhargava at [email protected].