Shrieking! Help my ears please!

[Spixie33]

I have a 15 month old who likes to shriek. It is usually very random that she will just do it while watching the other kids or while standing around.
I think she is doing it to hear her own voice and try it out.
Thankfully she does it for only a few minutes at a time once a day or twice a day.

I alternate approaches....I start by firmly saying "No. Stop. That hurts our ears" and give her a serious look so she sees it is not funny.

If that doesn't work then I try and ignore it and see if she loses interest when no one engages.

I find one or the other usually works. Sometimes she likes getting me to address her so it gets worse and then I switch to method 2 and sometimes method 1 works.

The worst is when my three year old DCK laugh and find it funny which then makes the shrieks go on and on and i have to give a scowl and a scolding to each of the kids for encouraging her

[Crayola kiddies]

Well for my 13month old I've tried ignoring , doesn't work, I've tried saying no shrieking or inside voice, doesn't work, I've tried putting the child in a playpen, makes it worse, I've tried wispering, doesn't work ..... Even the parents are exasperated. As I said before good thing she has two naps a day : )

[sunnydays]

I think the problem is the young age. For 18 months +, time-outs have worked well for me and I had eliminated (almost) the shrieking that the kids were doing and only had to remind them not to scream in the house. But, for this 15 month old, I am not at all sure that he gets the time-out concept and am hesitant to use it for screaming. Have any of you had success with time-outs at this age?

[Littledragon]

time out. stick em in the corner. stick on in the corner, the others will catch on. say "no screaming in the house" once and shush them. then when they do it again, corner. It sounds mean, but it works. I did it with a 11 month old and he caugh on really quick