Standards Secretariat

S1/WG 16 FFT Analyzers

The WG Scope is: To develop one or more standard(s) applicable both to stand-alone FFT analysis systems and PC or laptop-based methods. The standard(s) would address limitations and constraints on FFT analysis of acoustic signals and would define test signals and FFT results for those test signals such that the performance of FFT analysis systems could be verified and calibrated. The test signals would consist of sine wave, triangle waves, square waves, pink noise, white noise, and at least three impulses with different rise times and pulse widths. Other factors to be addressed will be sampling rates, A/D converter characteristics, A/D resolution, windowing, averaging, block size, overlap, radix, line spacing, and a section on uncertainty.)

For more information, contact the Working Group Chair:

R.L. McKinley,  richard.mckinley@wpafb.af.mil

S3/WG 93 Rotary Chair for Vestibular Function Testing

The WG Scope is:  Development of a standard to provide technical specifications for rotary chair testing of the vestibuloocular reflex and visual-vestibular interactions. This will include minimum acceptable tolerances, as well as the capability to perform a minimum set of evaluations. While the basic tests required of a rotary chair will be limited to vertical-axis rotary chair testing, when available in a rotary chair device, this standard will include acceptable tolerances and basic evaluations, for smooth-pursuit and optokinetic tests. The Working Group will also evaluate off-vertical axis rotations, subjective visual vertical and subjective visual horizontal testing for possible inclusion in the standard.

For more information, contact the Working Group Co-Chairs:

R.F. Burkard, rfb@acsu.buffalo.edu

C. Wall, cwall@mit.edu

S12/WG 50 Information Technology (IT) Equipment in Classrooms

The WG Scope is:  Develop new part to ANSI S12.60 to cover IT equipment with 1) recommended sound power criteria for IT equipment in classrooms, 2) recommendations for purchase specification format, and 3) recommendations for installation conditions of IT equipment.

 For more information, contact the Working Group Chair:

 R.D. Hellweg, Jr.,  Hellweg@HellwegAcoustics.com

S1/WG 88, Standard Audible Emergency Evacuation and Other Signals

The WG Scope is:  To revise and update ANSI S3.41-1990 (R2001) American National Standard Audible Emergency Evacuation Signal so that it meets the current needs of the life safety community and the signal manufacturing industry.

For more information, contact the Working Group Chair:

R. Boyer, bob.boyer@ge.com

WG 16, Wind turbines

This working group was formed to consider a potential new work item proposal on condition monitoring and diagnostics of wind power plants.

For more information, contact the Secretary:

S.B. Blaeser, sblaeser@aip.org

S12/WG 51 Procedure for Measuring the Ambient Noise Level in a Room

The WG Scope is:  Develop a new standard that will specify how to conduct ambient noise measurements in a room, including: instrumentation requirements, microphone placement, duration of each measurement, identification of specific noise sources (e.g., HVAC, lighting, electrical, exterior traffic and aircraft) and data reduction and analysis.

 For more information, contact the Working Group Chair:

 J.G. Lilly, jerrylilly@aol.com