OH OH OH!!!! i forgot to mention changing! Chanting cannot be a complete replacement of meditation but in my experience it can serve the same kinds of functions, and is certainly better in the face of distraction.
i think its fantastic, its much easier (for me at least) to concentrate on despite loud noises all around.
there is a specific rythem to them that i dont know, but there is always "Om Mani Padme Hum" ("the jewel is in the lotus", ill save from my explaination as to what it means) i have a little recording of it, i think this is a tibetan chant but im not sure, (I dont personally believe it makes a difference if it comes from tibet china or the moon, a chant is a chant) it is a short recording so really i just gave it to you so you would know the rythem, the chants that i have done have lasted about five minutes, but some can last hours. this one can go as long as you want it.
om mani padme humBuddhanet.net/audiothis one is simple, try to ignore the echo of voices and just say maaaaaaaa oommmm. at my temple we did this one once, with a more complex rythem but it was still simple enough to jump into. same thing as the one before, you can continue to play this one for five minutes or five hours. its all up to you.
OmSelfasinstrument.com/chants_mantrasmy suggestion is to just jump in, get those feet wet and try it. even if you dont do it perfectly right it cant do any harm. And since it cant entirely replace meditation i suggest using it as a conduit to focusing your mind before you meditate. I think it can help at least with emptying distracting thoughts, and that can help you start meditating without distractions.
another thing i can suggest that is going 180 degrees from everything else i have said. Today our dharma teacher said "everything is silent, the noise is in our head." The noise of a crying baby is no different from the noise of a bird chirping and no different from the noise of one hand clapping. i forgot most of the sermon, but it was realy appropriate for you situation because it was about sound, and about noise, and about silence. sorry i wish i could remember the rest of it. ^_^
hopefully the chanting helps alittle. I always find it fun if anything.