July Meeting Notice

July 2006 Meeting Notice

ABSTRACT

The Linear Array Transducer (LAT) is a loudspeaker technology using multiple opposed interleaved diaphragms to create a bass transducer with a cylindrical form factor and near zero mechanical vibration.  Its construction and operating principles will be described, including basic equivalent circuit diagrams, frequency response and impedance measurements. Some of the evolution and improvements in the design will also be discussed. System (box) design considerations are discussed and examples of its use in a product will be shown.

BIOGRAPHY

Christopher Struck graduated from the University of Wisconsin – Madison with a degree in Electrical Engineering. His studies also included electronic music composition. He also completed the Stanford/AeA Executive Institute program and the Leadership Development Program at the Center for Creative Leadership.

From 1986 through 1993, Mr. Struck was employed by Brüel & Kjær - Denmark, as an Application Specialist in Electroacoustics. From 1994 through 1995, he was a Principal Consultant for Charles M. Salter Associates, in San Francisco. From 1996 to 2001, he was Manager of Electroacoustics in the Research Group at GN ReSound in Redwood City, California. From 2001 to 2005, he was Director of Engineering at Dolby Laboratories in San Francisco. Currently, he is Vice President of Engineering for Tymphany Corporation in Cupertino, California.

Mr. Struck is the author of many technical papers, application notes and articles. During the course of his work, he has traveled extensively throughout the world, providing training and lecturing on the topics of acoustics, signal processing, and measurement techniques. He is a Fellow of the AES, a Member of the ASA, and a Senior Member of the IEEE. He is on the ANSI S3-48 Working Group on Hearing Aid Measurements, the IEEE Subcommittee on Telephone Instrument Testing, and the AES SC-4-3 Working Group on Loudspeaker Modeling and Measurement. He was the Workshops Co-Chair for the AES 117^th Convention. Currently, he is the Papers Co-Chair for the AES 121^st Convention.

He is a guitarist and composer and enjoys both live and recorded music. Mr. Struck lives with his wife in San Francisco.

Address

DeAnza 3 Auditorium
Apple R&D Campus
10500 N DeAnza Blvd, Cupertino, CA, USA

Directions

Finding De Anza 3 Auditorium

- De Anza 3 Auditorium is on the BACK side of the ground floor of Apple's De Anza 3 Building. De Anza 3 is a slightly older building located on the opposite side of Marianni Avenue from Infinity One and the Apple Campus Complex. (It is on the opposite side of the street if you are standing on the grass between Buildings 1 & 2.)

If you are arriving from 280, you have turned South on De Anza and are driving parallel to the Apple Campus, (Buildings 1-6), you will turn Left onto Marianni Avenue. Instead of turning into Apple Campus (Infinity Loop) on the left, instead turn right into the first driveway on the right, and drive to the back of the building around the right end, parking in the back parking lot. A set of double glass doors at the back of the building is the correct access - you will enter the glass doors and then go immediately right through the doors into the auditorium.