I came across these interesting (at least to me) articles.

<a href="http://www.babcox.com/editorial/bf/bf80426.htm">Silencing Brake Brake Squeal</a>
<a href="http://www.babcox.com/editorial/bf/bf060542.htm">Brake NHV, Part One</a>
<a href="http://www.babcox.com/editorial/bf/bf70552.htm">Brake NHV, Part Two</a>