I came across this YouTube video and I tried it to do this trick, but it's just pure facts, and if you force yourself it'll be absolute hell for your face, you might even get a headache.
Have you ever tried to do this trick at one point? Close your mouth, let out a little hum, and pinch your nose. I assure you the noise stops instantaneouslynfor anyone. I've tried to break this so many times but not once and I've not met anyone or heard of anyone that can do this. It looks like an odd thing, but scientifically it makes sense.
The reason is quite simple, because a hum requires an open passageway for air, a natural course of action is to not have one's mouth open, but rather a hum comes from your vocal cords and the tone of the hum comes from the cavities within your nose. So with a closed mouth, there is only one passageway.
The air escapes the nostrils and forms a sustained frequency of noise that everyone knows. That's how hum works.
When you pinch your nose shut, that channel no longer exists. There is no way for air to escape. The vocal cords may still vibrate in the effort to create a sound for you, but that volume remains trapped inside. Instead of hearing that sustained noise, what you're going to feel is pressure in your face. The sound drops out because the nasal passage that sustains the tone is now closed off.
There's a rough sound heard from deep within your throat, but that's no real hum because it's not resonating from the nose which is the contributor of the noise of the hum.
The body is very good at creating channels for air without someone thinking about it, it's all involuntary, breathing, talking, singing all depend on open passageways. A hum is just another example of that. So the second that the nose is pinched shut, it has no way of making the sound echo or vibrate. This is clear and obvious evidence of how much more the nose is working in the sounds we make whether voluntarily or not.
Not just that, it's also a testament of how interconnected simple things can be especially with regards to our bodies.
Just one small change can create an entire different outcome. The hum we do would seem effortless, but without proper channels it's impossible for you.
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