Can some one plz tell me where i can get a sound file for this word siochain it means peace but i have no idea on how to say it.
Thanks for any help
regards

Peace = Síocháin

It's feminine. Here's all its different forms:

Nominative case
Singular: An tSíocháin
Plural: Na Síocháiní

Posessive case
Singular: Na Síochána
Pural: Na Síocháiní


An Garda Síochána = (very loosely translated) = Protectors of the Peace

As for pronunciation... well here's how I say it with my Dublin accent:

Three syllables: [sí] [o] [cháin]

Written english-ly would be: [she] [uh] [coin]

With "An tSíocháin", it becomes [chee] [uh] [coin] (chee as in cheese)

Síochána = [shee] [uh] [caw] [na]

Síocháiní = [shee] [uh] [coin] [E] (E as in Eazy)

Some examples:

Is aoibhinn liom an tsíocháin!
Bíonn síocháin ag teastáil ó gach éinne.
Cár imigh an tsíocháin?!
Táimid ag lorg síochána.
Cé atá i bhfeigil na síochána?
Cár imigh na síocháiní san Iaráic is i Meiriceá?
Cé a bhí i bhfeigil na síocháiní san Iaráic is i Meiriceá?

And the dative case, which is a carbon copy of the Nominative for 99.99% of words in Gaeilge:

Bhí sé ag smaoineamh ar an tsíocháin.
Bhí Seán ag tagairt don tsíocháin.
Bhíos ag breathnú ar shíocháin.
Bhí sé ag súil le síocháin.

On RTE I they seem to turn the ch into an english h making it sound like "shee-oh-hawn"

That's to do with the speaker's accent. For instance:

"I just don't know."

I don't pronounce the last t in just. Similarly, with butterfly, I say something more like buh-r-fly, ie. I don't pronounce the the t in the middle.

Up North, there's quite a few accents that will leave out ch, as in:

buachaill = buahill
iontach = ionta
síocháin = síohán

Throughout the entire world there's all sorts of accents that augment some vowels and consonants while diminishing others. At the end of the day it's still a human voice and your brain will be able to decode it!