new to android, but long time music listener on motorcycle. Full face helmet, right? I don't think that unless you put in expanding ear buds you will get the silence you seek, and even with those, it will be iffy. People I know who have the Sena or scala, no noise canceling there and the helmet is only as silent as it would be without the speakers.
Also, I am sure you want to be able to hear certain road noises, right, so you do not want full noise canceling. If what you seek is ava, and I sorta doubt it, I would suggest going over to the ADVrider.com forum and look around there or post your question.
Right now I am using earbuds from MEElec with ComplyFoam buds...wired
John