Thin wall and noisy students - Help

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i live in a mid terraced house next door to students, they are a bit noisy but i think the main problem is that the party wall is a single brick and plaster board.As you can imagine the main noise is when voices are raised , music (although most of the time i think this is a resonable level in the actual ajoining property except i don`t want to hear the buzz of it!).There are also stud wall covered fireplaces in both affected bedrooms and sitting room. Solutions ?