That's a way, and perhaps the most common, but far from the best. In particular, it has to be used preemptively before pressure builds up. https://en.wikipedia

That's a way, and perhaps the most common, but far from the best. In particular, it has to be used preemptively before pressure builds up. https://en.wikipedia.org/wiki/Ear_clearing https://en.wikipedia.org/wiki/Ear_clearing