2007 Winter Symposium: Training Classes

Practical Aspects of Loudspeaker Design - Peter Larsen (Loudsoft)

Fact or Opinion - Lidia Lee (GedLee)

Loudspeakers 101 for Non-technical Professionals - Dan Digre (Misco / Minneapolis Speaker Comany)

Practical Aspects of Loudspeaker Design - Peter Larsen (Loudsoft)

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

Obtaining smooth production and high quality products during development. Each attendee will receive a copy of the training book “Better speaker designs in practice”

The training program will cover:

 1) Magnet systems
            a. How to design a powerful magnet system
            b. How to avoid heating problems
            c. Handling of voice coils
            d. Material differences: USA - China         
            e. Practical examples
2) Dome tweeters
            a. How to design the perfect dome
            b. Difficulties of finding the right material

            c. Some tolerances are more important than others
            d. The surround is also important

            e. Glue problems and glue advantages
            f. Butterfly – makes life easier

           g. Practical Examples

3) Cones
            a. Geometrical stiffness
            b. The un-importance of the material
            c. Stiffness, damping and break-ups
            d. stiffness of the surround also is important
            e. Practical examples
4) Cross-overs
            a. Why do the theoretical x-over not work?
            b. Loudspeaker loads
            c. Power and excursion considerations in x-overs.
5) Measurements
            a. Reflections
            b. Measuring the room instead of the driver

            c. On axis and off axis measurements
            d. Practical examples

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Fact or Opinion - Lidia Lee (GedLee)

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

Facts versus opinions can often be the determining factor in critical decisions in the design process. The difference between the two is if a claim is supported by a scientific process or research.  In this session, we will discuss potential errors in decisions that use opinions as fact.  We will discuss evidence-based research methods and the various components and steps that are involved in experimental design, including ‘blind’ designs.  We will also include steps involved in conducting an experimental study such as how to formulate a hypothesis, issues relating controlling variables, test validity and reliability, internal versus external validity and accuracy and basic statistical techniques and analyses.  A solid understanding of the foundation of how a research task should be conducted will allow you to critically analyze the information presented to you and how to determine its fact vs. opinion basis.  This information can then be used accordingly.

Opinions versus facts
a) What constitutes a fact
b)Typical examples of opinions claimed as facts
c) Potential errors when one assumes opinions as fact

Evidence and evidence based research
a) What constitutes scientific evidence
b) Principles of experimental design
c) Single and double blind testing

Experimental design
a) Formulating an hypothesis
b) Translate hypothesis to design
c) Variables: controlled and extraneous
d) Test validity and reliability

Data analysis
a) Significance testing
b) Regression analysis
c) Multi-variable analysis
d) Examples using SPSS

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Loudspeakers 101 for Non-technical Professionals - Dan Digre (Misco / Minneapolis Speaker Comany)

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

This class is designed for sales, purchasing, or general management who are non-technical, but must need to acquire more knowledge of the terminology and function of loudspeakers. Topics include the basic principles of sound, how a speaker works, the parts of a loudspeaker and their function, electrical, acoustical and specification terminology. The class will include demonstration of many of these items as well.  Each participant will receive a booklet that will include the material covered plus a more in-depth presentation of each topic. 

 

"The ALMA Speakers 101 class was very beneficial for me as a Marketing Director. The class was highly informative, focusing on the materials and parts that make up a loudspeaker and how they effect its specifications. The class consisted of a total of 8 people from manufacturing companies who worked in the production, purchasing and marketing fields. We learned how key specs can be, what they mean exactly and why they’re important. I know and appreciate so much more about speakers now and highly recommend this class to anyone who has any involvement with speaker manufacturing."

Andrea Renz, Marketing Director - Russound

 

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