This is hypoxia.

Why lack of oxygen? This has something to do with the principle of vocalization in singing.

Opening and stabilizing the throat when singing is the core of basic singing skills training and directly affects the quality of the voice. When people yawn, their mouth will open naturally and relaxedly, and the space in the mouth will increase. Opening the throat is like yawning, opening the throat and allowing the breath to come out freely.

With breath support, the formation of continuous impact on the vocal cords is composed of breath movement and vocal cord vibration. My daily breathing is relatively calm, but when I sing, I inhale quickly and exhale slowly. When singing, you should have your breath as a support point and keep your breathing steady. Not only will the sound be pleasant and the intensity can change freely, but it can also increase lung capacity.

But when making high-pitched sounds, you need to make a nasal or oral sound. To achieve nasal cavity tinnitus, the key is to keep the nasal cavity open during singing. I have never experienced dizziness in people who snort through their nasal cavity.

Poor airflow is the root cause of dizziness.