2008 Winter Symposium: Training Classes: Christopher Struck

Electroacoustic Measurement - Christopher J. Struck (CJS Labs)

4 hours - Cost $175 (members) / $225 (non-members)

Christopher Struck explains the fundamentals of electroacoustic measurements, including principles of acoustics, instrumentation, and data interpretation as well as practical information on how to perform appropriate loudspeaker tests. Since the course focuses on the principles behind performing proper measurements, it is applicable to both R&D and production. This course is appropriate for both novices and people with some test and measurement experience

The training program will cover:

1 – Measuring Sound – Basic Acoustics

• Sound Pressure & Sound Pressure Level
• The decibel
• Wavelength & Frequency
• Detectors & Time Constants
• Measurement Microphones and Applications

2 – Psychoacoustics & Hearing

• Anatomy of the Ear
• Detection and Signal Processing within the Ear
• Frequency and Dynamic Range
• Masking & Critical Bands
• Directional Effects
• Loudness

3 – Sound and the Environment

• Sound Sources & Sound Radiation
• Near Field & Far Field
• Sound Fields
• Free Field & Reverberant Field
• Elementary Room Acoustics
• Reflections & Boundary Effects

4 – Frequency Analysis & Measurement

• Filters
• Constant Bandwidth & Constant Percentage Bandwidth
• Overview of Analysis Methods & Stimulus Signals
• Time & Frequency Domains & Causal LTI Systems
• The FFT
• Time Windows
• Averaging
• Overlap & “Real Time” Analysis
• Cross Spectrum & Coherence
• Reference Levels & Calibration
• Simulated Free Field Measurements
• Introduction to Non-Linear & Time Variant Systems

Christopher J. Struck

Christopher Struck began his career as an application specialist with Brüel & Kjær Denmark in 1986, after graduating from the University of Wisconsin – Madison in 1985 with a degree in Electrical Engineering. In 1993 he returned to the US, where he has held a variety of engineering and management positions at Charles M. Salter Associates, GN ReSound, Dolby Laboratories and Tymphany Corporation. He is now CEO and Chief Scientist at his own consultancy, CJS Labs.

He has authored many technical papers, application notes and articles and has provided training and lecturing on the topics of acoustics, signal processing, and measurement techniques worldwide. He is a Fellow of the AES, a Member of the ASA, and a Senior Member of the IEEE. He is on the AES SC-04-03 Working Group on Loudspeaker Modeling and Measurement, as well as electroacoustic measurement working groups and committees in other application areas.

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