Author: clarnibass
Date: 2022-09-08 10:05
As mentioned in several replies above, you can easily test by plugging it with your hand, but you can also use tape, etc.
More accurate than suction is blowing, but don't just blow normally, you sort of "squirt" air from your throat. This is very sensitive in identifying leaks, and I have a magnehelic machine for comparison. For the part itself it doesn't matter how you do it, only the "strength" of how you blow, but pushing it from the throat this way is a lot more sensitive so you can feel it. The only thing is it takes some experience to get a feel for it, changing and controlling the amount you push. Maybe at first practice on just the barrel and then just the mouthpiece, so you have a comparison.
As someone suggested you can use a "medical" approach of just replacing the cork, assuming this is a regular tenon with a cork. The question is whether you want it to seal or just want to know if it is sealing now.
Here is another option that works great with clarinets in general. Plug one end, fill with water, make sure to not have any overflow and also that the water is at least higher than the area you want to check. Then dump the water, checking that it is not running back on the outside, and then blow into it (with one end plugged). Sometimes you would even see the water running out through the leak before you dump it. When blowing, you will hear air bubbles through water in the location of the leak, and often will see it too. You only need to not have water on the outside because then it's very hard to see where the leak is coming from, but I guess in the case of just a mouthpiece and barrel it's not really important anyway.
You can also just blow while in it's water, which is a little tricky with just your hands and mouth.
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The Clarinet BBoard
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