It's possible that a title for the section was added, but nobody ended up actually writing it for whatever reason.

You can try scrolling through the page revision history to see if it possibly was written at some point, but it's a lot to go through.

Looks like it was added then commented out in 2012.

=====Sound is "garbled" or phonemes appear jumbled=====
While this problem is uncommon, it's quite maddening to track down. However, since the board architecture is split between a "sounds" lane and a "speech" lane, at least the number of suspect components can be narrowed. In at least one instance, "garbled" sound was caused by a failed 74LS75 latch. Just after the game was turned on, sounds were normal. But, as components on the speech and sound board would "heat up", speech became garbled, progressively becoming worse, until the speech was completely unintelligible, and then completely missing. The 74LS75 latches may be replaced by 7475s.

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Maybe ChrisHibler has some insight into this?

According to a thread on RGP, Chris seems to indicate the reason it was commented out was that it wasn't actually the cause of the issue he was having.

https://groups.google.com/forum/#!msg/rec.games.pinball/KGHjF2IrRP8/uzyv_iGxWTUJ

A possible repair suggestion:

https://groups.google.com/forum/#!msg/rec.games.pinball/3hp6ExLtwAo/24rYY-a21gAJ