Re: Sound Quality metrics for ABS auto products (Khalid )

Subject: Re: Sound Quality metrics for ABS auto products
From:    Khalid  <khalid(at)DIALUP.FRANCENET.FR>
Date:    Thu, 20 Apr 1995 21:44:20 +0200

Dear Jim First thanks for your reply. Now, I did read many of the postings in this group. Most of the members are like yourself, i.e. interested in music. However, laws of nature that apply to music also apply to auto systems. I have recently browsed through a paper that studied how sound is generated in a violin. It came to the conclusion that breif periods of structural instability is reached in order to obtain the required high levels of vibration. This is exactly the same mechanism that makes some vehicles squeal when you touch your brake early in the morning or at a light stop. I mention this example to invite you to look at other problems including mine, may be whatever tool developed for one application may serve the other. In engineering we always think of degrees of freedom and spaces to define our problems. If there exists a number of sound quality metrics that measure independent aspects of sound quality, then there is a larger possibility that a better definition of sound quality can be found in the space defined by these metrics. Then comes the natural step of trying to project this space on a one diemensional space, where a unique mapping can project all these metrics onto your newly invented yard scale. To my understanding, unlike spectral analysis, human perception has a memory element. That is where I have a difficulty with the spectral analysis tools that I am used to. May be with your help and that of others members in this group progress can be made. I have literally hundreds of sound recordings for ABS noise, and Booster noise, that I can make available for trying out ideas. I use MATLAB for most of my analysis. Thanks again for your intesest. Khalid >Dear Khalid, > >I am interested in sound quality metrics for musical instrument sounds. >Do we have any overlap? > >Jim Beauchamp >beaucham(at) >after May 11th: j-beauch(at) > > ---------------------------------- Khalid(at)

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