The first thing that comes to mind for me is to possibly implement an inline insulated enclosure with either a plastic or metal case, with a suitable insuation material inside the case to dampen noise emissions...<br>
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the second thing that comes to mind was advice my dad gave me way back when I bought my first car - an old jalopy, he said "if it makes to much noise, just turn up the radio"<br>
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best of luck,<br>
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Paul