Thank you all for your answers. But there's still something that I don't understand. And that's why I'd like to ask you to do something else for me. Here's a rhyme (стихотворение) and some fragments from it. Could you tell me what sounds do you hear in the fragments? In the fragments called 'noise1' 'with Scotland Yard' and 'waves' I hear voiceless consonants in spite of the rules as I know them. And only 'wind' is pronounced with voiced consonant as it it should be.
I'm sorry for being annoying, but it really confuses me. I myself try to pronounce according to the rules. That is, I say [noiz] [wind] [weivz] and try to say a[bs]solutely and wi[ð] Scotland though it's really difficult, especialy when I speak quite quickly. And of course I do pronounce voiced consonants in cases like as I know (ass I know is really funny)