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Speaker Asylum General speaker questions for audio and home theater. |
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Speaker Asylum General speaker questions for audio and home theater. |
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In Reply to: Re: Too Hot posted by tomservo on August 5, 2003 at 16:47:50:
That link is a novel approach and will look into that sub very curious! Will also look at that patent. As far as the TEF and Hyser- He said that the TEF system can be used to make both valid and invalid measurments. I am no TEF expert but I do know what Hyser said. It may be possible to set the TEF up to make time measurments but no one I have spoken with knows how, not that you do not. If one uses the standard setups the results may or may not be valid. This depends on the mapping of sweep into the time domain being valid. I do not recall the transform name but the transform has two terms- one which maps correctly and one which does not. I would need to dig some to relocate the exact reference but this is the short answer. The problem is as a standard TEF user it is difficult to determine when the mapping is valid. Under the condition of minimum phase, as I recall, results can be accurate, however non-minimum phase conditions can produce results that are incorrect. The same problem exist with this latest Audio Control Iasys software. Sometimes it worrks- sometimes it doesn't. One never knows when. With your approach of sorting out phase with each driver and then moving on to modeling and phase with the system, this would cause me to believe that you are working with a dominant term which maps correctly. This is because you start close to the right answer and move closer. If you start far away is for certain when you get into trouble, as most transducers and speaker designers do.Good job on that speaker. Would love to listen someday. That B&O S-45 did not make a bad square wave either.
Good luck,
R
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Follow Ups
- Re: Too Hot - audiographic 17:11:30 08/05/03 (2)
- RE TEF and Hilbert - Jon Risch 20:51:35 08/05/03 (1)
- Subs - audiographic 08:14:04 08/06/03 (0)
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