The lamp flasher does help. These days I get so few phone calls that I don't have it hooked up. The flashing light option is marketed toward people with a hearing impairment, and it is nice that it can be helpful for both hearing too little and hearing too much, i.e., over sensitivity.
I like Marky9's method of checking voice mail from a web interface. My messages are usually from companies trying to sell me something, and having to listen to that close in my ear is abhorrent.
I think you are right, JBlitzen, about the anxiety being more than just due to a startling ringtone. When I was a kid, a ringing phone represented the unknown: a disembodied voice/person that could be anyone calling from anywhere about anything. (We didn't have call display when I was growing up.) Couple that with often not being able to understand what was being said, and the need to play the social game as best I could on demand, and it is obvious to me why I detest the phone.
I find it interesting that the three sounds I seem to really hate the most are ringing alarms/phones (especially the old-fashioned bell sound), the sound of knocking on a door, and for some reason the sound of high heels walking on a hard floor, like down the hallway or street. I have no idea where that came from, but when I hear someone approaching with heels on, I just cringe.
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I have spent most of the day putting in a comma and the rest of the day taking it out.
? Oscar Wilde