Vice-chair David Josephson convened the meeting, patent policy read, introduction of attendees, agenda approved, report of previous meeting held 2019-10 in New York approved.
In attendence were R. Cabot, B. Olson, E. Werner, S. Thompson, D. Satz, H. Wittek, E. Brixen, D. Josephson, B. Samiljan, H. Riekehof, A. Kuzub, J. Berryman, B. Whitlock, M. Schneider.
The members participating introduced themselves, from a variety of organizations including microphone makers, users and acoustical engineers.
AES42-R Review of AES42-2010: AES Standard for Acoustics - Digital interface for microphones
Progress was reviewed. Jeff Berryman reported on the continuing interest in developing an OCA template for microphones including wireless microphones, and will upload a preliminary draft to the SC-04-04 document site. Work on the revision of AES42 could incorporate such information if there were demand for it. The chair invites all interested parties to comment on the draft revision before the next meeting, using this email reflector. If there is interest we can incorporate new information, otherwise the maintenance revision will be made final.
AES-X085 Detailed Professional Microphone Specifications
This work has evolved into AESSC’s input to IEC TC-100 through our A-liaison with IEC, primarily toward the maintenance of IEC 60268-4 rather than developing an AES standard. Erhard Werner reported on the German DKE group’s review of potentially needed updates to the standard. Martin Schneider from Neumann suggested that the current revision of the standard probably requires no changes. There is a copy of the current standard on the SC-04-04 doc site, members are encouraged to review and submit comments via this email reflector. It was noted that the wind noise test “round robin” was stalled with the test articles still at one manufacturer’s lab, and agreed at this meeting that they would be forwarded to Eddy Brixen in care of DPA for the next phase in this work, which involves a more in-depth characterization of wind sensitivity. Other potential areas for improvement that have been discussed at previous SC-04-04 meetings include a revision of the definition for maximum sound pressure level.
There is no liaison work now underway.
No new projects were proposed.
The vice-chair reminded the group that there was still no chair of SC-04-04 and invited those interested in taking on this function to advise him, standards manager Rich Cabot and/or standards chair Bruce Olson of their interest.
The next meeting will be held in New York, NY, US 2020-10, in conjunction with the AES 149th convention.