AES Section Meeting Reports

Dr. Uwe J. Hansen making his presentation

Meeting Topic: Phase Considerations in Signal Processing

Moderator Name: Kyle Snyder

Speaker Name: Dr. Uwe J. Hansen

Other business or activities at the meeting: We discussed possible future meeting ideas and were given a preview of some of the future meetings currently in the planning stage. It was also mentioned that we hope to have a combination summer meeting and outing at Conner Prairie Farm in conjunction with a tour of the sound reinforcement system used for the Indianapolis Symphony Orchestra outdoor concerts.

Meeting Location: ESCO Communications, Indianapolis, IN, USA

Summary

In his presentation, Dr. Hansen discussed how phase comparison can be a powerful tool with countless real-world applications. The three specific applications of phase related signal processing techniques discussed were phase sensitive detection, optical holography, and modal analysis.

Dr. Hansen explained that the elements essential to describing a monochromatic wave are amplitude, frequency, wavelength, speed of propagation, polarization and phase.

Additionally, it was explained that phase identifies the location of a point along the propagating waves and that absolute phase measurements are not only difficult but generally not of interest.

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