Hejida hakim, uhigini, I am thinking of a new conlang and I want it to be easy to understand even in a noisy setting or over a bad connection (like a skype connection where one person uses dialup :) ). One of my ideas are a LOT of free variation. The other is not to use 'similar' phonemes. I have decided to retain voice contrast but I wonder whether this makes sense. Apart from that: which phonemes sound alike to you in noisy environments?