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Junior Varsity
Listening Get Together
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<blockquote data-quote="Jay Barracato" data-source="post: 81890" data-attributes="member: 24"><p>Re: Listening Get Together</p><p></p><p>As I said, I can do a transfer function which would tell us the frequency and phase response of the source under test. if a single box is tested, it would tell us little about how the box performs in groups. The transfer function can be done at different physical angles which would allow me to do a rough polar but that may have accuracy problems due to changing the source/mic positions. I can easily test the claim that the box does not follow the inverse square law by measuring response at different distances. I cannot do any absolute measurements such as peak SPL, or THD that are meaningful.</p><p></p><p>The biggest difference between what I can do and what Pat can do is that Pat can provide traceable calibrations of his equipment, whereas I am a field technician and do just about all of my work with uncalibrated mics.</p><p></p><p>Since my purpose is to get a system ready for this evenings show, I need the measurements to show me gross problems and to create a baseline visual to match what my ears tell me. Because all of those measurements are relative, they do not require the extra expense of traceable calibrated mics. </p><p></p><p>In other words, I can produce measurements that are useful to me for answering my own questions about a system under test. Those same measurements are of dubious quality to anyone else without significant peer review and confirmation.</p><p></p><p>You could send the boxes to ten people like me and when we all get comparable results then those results would become believable, or you could send the boxes just to Pat and have data that will be instantly accepted by the professional community.</p></blockquote><p></p>
[QUOTE="Jay Barracato, post: 81890, member: 24"] Re: Listening Get Together As I said, I can do a transfer function which would tell us the frequency and phase response of the source under test. if a single box is tested, it would tell us little about how the box performs in groups. The transfer function can be done at different physical angles which would allow me to do a rough polar but that may have accuracy problems due to changing the source/mic positions. I can easily test the claim that the box does not follow the inverse square law by measuring response at different distances. I cannot do any absolute measurements such as peak SPL, or THD that are meaningful. The biggest difference between what I can do and what Pat can do is that Pat can provide traceable calibrations of his equipment, whereas I am a field technician and do just about all of my work with uncalibrated mics. Since my purpose is to get a system ready for this evenings show, I need the measurements to show me gross problems and to create a baseline visual to match what my ears tell me. Because all of those measurements are relative, they do not require the extra expense of traceable calibrated mics. In other words, I can produce measurements that are useful to me for answering my own questions about a system under test. Those same measurements are of dubious quality to anyone else without significant peer review and confirmation. You could send the boxes to ten people like me and when we all get comparable results then those results would become believable, or you could send the boxes just to Pat and have data that will be instantly accepted by the professional community. [/QUOTE]
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