Answer:
whisper : shout
Explanation:
Sniffle means: <em>"to sniff slightly or repeatedly, typically because of a cold or fit of crying."</em>
Sob means:<em> "cry noisily, making loud, convulsive gasps."</em>
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This is about a sound that is low against something very loud and noticeable.
Target and Mark don't really fit that idea. These to are connected with each other, but not with the two words of the question. Adress:Label kinda follow the same idea. We have left whisper, a low sound. And Shout, which is very noticeable, usually.