Before you spend more money on new broadhead try this. Take one of your arrows install your broadheads. When they are tight on the arrow, look to see if they are directly opposite of your fletching. If not, try another one until you have one that is opposite. Shoot and see if the noise is gone. Each broadhead will end up at a different position when installed do to where the thread position was when fletched. Try different broadheads on one arrow until they match. This seems to help reduce noise.