I wish to comment on the advice you gave to Nancy on turn signal volume which appeared in the May 13, 2011 issue of the RGJ. She complained that her dad could not hear the turn-signal flasher.
I happen to be one of those old geezers who do not hear my turn signal indicator (with very expensive hearing aids!). As you well know, as one grows older, hearing of the high frequencies decreases. The prime examples are the turn signals and the wife’s voice. However, my 2007 Buick has an alarm that goes off when the turn indicator has been on too long. This is VERY audible. The visual blinking light is not relevant when the driver is watching the road.
The problem is not with the old geezer, but with the sound frequency of the turn signal indicator. This problem could readily be corrected by the automotive engineers, i.e. change the audio frequency of the turn signals. It may avoid accidents.