ANSI/INFOCOMM 1M-2009, Audio Coverage Uniformity in Enclosed Listener Areas


Type: Standard

Topics: Standards

Date: November 2009

The Audio Coverage Uniformity in Listening Areas (A102.01:2017) draft standard is open for public review and comment from 25 November 2016 to 9 January 2017 (5:00 PM EST).

Download the draft and submit your comments

If approved, this Standard will supersede ACU 1M-2009.


Audio Coverage Uniformity in Enclosed Listener Areas

Document Number:


Type of Standard:



Under Revision


One of the fundamental goals of sound system performance for both speech reinforcement and program audio is the delivery of consistent coverage in the listening area. A well executed audio system design is one that allows all listeners to hear the system at approximately the same sound pressure level throughout the desired frequency spectrum range, no matter where positioned in the designated listening area. This standard provides a procedure to measure this spatial coverage, and criteria for use in the design and commissioning of audio systems.

Read an overview

Publication Date:

November 2009


ACU, audio coverage uniformity, audio system, critical distance, listener area, sound pressure level, sound system, spatial coverage, uniformity

Task Group Members:

  • Frederick Ampel, Technology Visions, Moderator
  • Norman Cleary
  • Eric Cronwall, CTS-D, Avidex Industries LLC
  • Christopher Maione, CTS-D, Christopher Maione Associates
  • Steve Mills, CTS-D, CTS-I
  • Ray Rayburn, FAES, K2 Audio, LLC
  • Peter Swanson, CTS, AMX Corporation

InfoComm's consensus standards development process is accredited by ANSI, a private, non-profit organization that administers and coordinates the U.S. voluntary standardization and conformity assessment systems. ANSI is the sole U.S. representative of the two major non-treaty international standards organizations, the International Organization for Standardization (ISO), and, via the U.S. National Committee (USNC), the International Electrotechnical Commission (IEC). Accreditation by ANSI signifies that the procedures used by InfoComm International in connection with the development of American National Standards meet the Institute's essential requirements for openness, balance, consensus, right to appeal, and due process.

Pricing Information

Due to the upcoming revised Standard, the 1M-2009 Standard has been discontinued from the webstore. Please watch this page for updates on the upcoming revised Standard, or email for support.