It’s Impossible to Hum More Than a Couple Seconds While Holding Your Nose
Here’s a fun and weird fact about the human body: it’s impossible to hum while holding your nose shut. When you hold your nose, you block the airflow required to produce sound. Humming, singing, or speaking relies on the passage of air through your vocal cords, and this can’t happen if your nose is pinched shut. Try it yourself; it’s a simple experiment that demonstrates the relationship between your nose and your ability to produce certain sounds.