How the Voice Works
Your voice is an instrument built from three cooperating systems: a power source, a sound source, and a resonator. Understand them and everything else about singing gets easier.
Three systems, one sound
Every sung note is the result of three parts working together: your breath powers the system, your vocal folds in the larynx generate the raw sound, and your resonators — throat, mouth, and nasal passages — shape that raw sound into the tone you actually hear. Change any one of the three and the sound changes.
The power source: your breath
Airflow from your lungs travels up through the windpipe and is what sets your vocal folds vibrating in the first place. Without steady airflow, there's no sustained tone — which is why breath support (covered in its own lesson) is the foundation underneath everything else you do with your voice.
The sound source: vocal folds in the larynx
The larynx ("voice box") sits at the top of your windpipe and houses the vocal folds — two small bands of tissue that stretch across it. As air pushes through, the folds open and close rapidly, hundreds of times per second, producing the buzzy raw sound that becomes your voice. In general terms, they stretch thinner and vibrate faster for higher pitches, and stay thicker and looser for lower ones.
The resonator: throat, mouth & nasal cavities
The raw sound leaving the vocal folds is still just a buzz — it's your vocal tract (throat, mouth, and nasal cavities) that acts as a resonating chamber, amplifying certain frequencies over others and shaping that buzz into a full, recognizable tone. Every vowel reshapes this chamber slightly, which is part of why "ah" and "ee" feel and sound so different even at the same pitch.
Quick check: name the three systems
1. The power source
Your breath — steady airflow from the lungs is what sets the vocal folds vibrating and keeps a note sustained.
2. The sound source
Your vocal folds, inside the larynx — they vibrate as air passes through, producing the raw buzz that becomes your voice.
3. The resonator
Your throat, mouth, and nasal cavities — they shape that raw buzz into the full tone you actually hear.
Common questions
What produces sound when you sing?
Your vocal folds — two small bands of tissue inside the larynx — vibrate rapidly as air passes through them, producing the raw sound source that becomes your voice.
What role does breath play in singing?
Breath is the power source. Steady, controlled airflow is what sets the vocal folds vibrating and keeps them vibrating consistently for a supported tone.
What are resonators and why do they matter?
The throat, mouth, and nasal cavities shape the raw buzz from the vocal folds into the fuller tone you hear, and they change shape with every vowel.
Do the vocal folds change for different pitches?
Yes, in general terms — they stretch and thin to vibrate faster for higher pitches, and stay thicker and looser for lower ones.
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