2009 Winter Symposium: Training Classes: Christopher Struck
Electroacoustic Measurement - Christopher J. Struck (CJS Labs)
8 hours - Cost: half day $175 (members) / $225 (non-members); Full Day $325 (members) / $425 (non-members)
This is a two-part course. The morning session covers similar content to last year's electroacoustics course - the fundamentals of electroacoustic measurements. The afternoon session will expand on the knowledge gained in the morning session to cover additional topics. Please see the full class outline below. Attendees may sign up for just the morning, just the afternon, or the full day class.
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.
Course Outline:
MORNING
Introduction
Transducers & Reciprocity
Subjective & Objective Tests
Basic Acoustics and Measuring Sound
Sound Pressure & Sound Pressure Level
Wavelength & Frequency
The Decibel and Working with Decibels
Weighting Networks
Detectors, and Time Constants
Sound Sources and Sound Fields
Ideal Sources, Sound Radiation, and Sound Fields
Transmission, Reflection and Diffraction
Elementary Room Acoustics
Anechoic Chambers and Reverb Rooms
Psychoacoustics & Hearing
Frequency and Dynamic Range
Masking & Critical Bands
Directional Effects
Anatomy of the Ear
Detection and Signal Processing within the Ear
Loudness & Hearing Loss
Measurement Microphones
Principles of Operation
Frequency & Dynamic Range
Microphone Types, Selection and Applications
Field Calibration
Frequency Analysis
Signal Types
Filters and Filter Analysis
Confidence Limits, and Averaging Time
The FFT
Time Windows, Overlap & “Real Time” Analysis
AFTERNOON
System Analysis
Time & Frequency Domains
Causal Linear Time-Invariant Systems
Analysis Methods: Dual Channel FFT, MLS, TDS, etc.
Stimulus Signals
Simulated Free Field Measurements
Sound Paths, Correlated and Uncorrelated Noise
Quasi-Anechoic Test Methods
Near Field Measurements
Time Selective Techniques
Distortion & Non-Linearity
Non-Linear Systems & Distortion Order
Distortion Audibility
Loudspeaker Defect Detection
Harmonic, Intermodulation & Difference Frequency Distortion Tests
Measurements of Band-Limited Systems
Time Variance and Linearity Measures
Special Topics
Impedance and Small Signal Parameters
Vibration Measurement and Modal Analysis
Directional Measurements and Polar Response
Introduction to Time-Frequency Analysis
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.