SC-04-03 meeting report, New York, 2013-10

Report of the meeting of the SC-04-03 Working Group on loudspeaker modeling and measurement of the SC-04 Subcommittee on Acoustics, held in New York, NY., US., 2013-10-19

The meeting was convened by chair S. Hutt.

The agenda and the report of the previous meeting, held in Rome, 2013-05-06, were approved as written.

Open projects

AES-X168 Characterization of loudspeaker systems
scope: [To be revised] This document defines a minimum set of characteristics of loudspeaker systems for inclusion in manufacturers' specification documents, and identifies the relevant methods of measurement. The document considers both passive and active loudspeaker systems for professional applications. It does not consider components of such systems such as loudspeaker drivers or crossover filters.

status: Project status made active, scope to be established.

Discussions: John Woodgate has posted a first draft "Characterization of Loudspeaker Systems" providing a foot hold to launch document development. The table was specifically cited as requiring updates and it was noted that not all powered systems accept analog input.

AES-X194 Report on loudspeaker terminology
scope: [To be revised]

status: Project status made active, scope to be established

Discussions: The working group is urged to check the existing definitions listed in the IEC Electropaedia before. Any additional definitions needed for new work on loudspeakers should be identified.


IEC 60268-5 - Sound systems, loudspeakers
John Woodgate reported that IEC has received and authorized three new project proposals;

Task Force 1; German National Committee proposal. Intent to revise IEC 60268-5 to deal only with drive units, and produce a new standard for loudspeaker systems.

Task Force 2; China to consider a standard for measuring micro-drivers, approximately 2 inches diameter.

Task Force 3; CEA Revise IEC 61305-5 consumer oriented loudspeaker measurements, using appropriate methods of measurement from IEC 60268-5.

New Projects

AES-X223: Loudspeaker Driver Correlation Chamber
Replicating non-anechoic loudspeaker driver measurements in different locations is a well known and challenging endeavor due to numerous influences and degrees of freedom.

A new project, provisionally identified as AES-X223, was discussed. The project scope is to develop a report that will provide information required to assemble and setup of a test chamber that can be replicated in different locations. E. Simon and G. Hill have already begun measurement chamber developments and documentation. Target release for this report is before the 136th convention in Berlin.

New Business

No new business was proposed.

The next meeting will be scheduled in conjunction with the AES 136th Convention, Berlin, Germany, 26 to 29 April, 2014

AES - Audio Engineering Society