Definition
Can a computer 'see' your voice?
Sound is a wave of vibrations in the air. A microphone turns the wave into an electrical signal, and the computer measures that signal thousands of times every second. Each measurement, called a sample, is stored as a number, so a recording becomes a long list of numbers.
In simple words
Imagine drawing the wave on graph paper and writing down its height at every tick. Loud sounds make tall waves and big numbers. High-pitched sounds make waves that are packed close together. Voice assistants learn which patterns of numbers mean which words.
Why it matters
Voice assistants, song recognition, live captions and translation apps all rely on turning sound into numbers. It is the same idea as pixels: once sound is numbers, AI can learn patterns in it.
How it works
| What you hear | What the wave looks like | The numbers |
|---|---|---|
| Loud | Tall waves | Big values, far from zero |
| Quiet | Short waves | Small values, near zero |
| High pitch | Waves close together | Values change quickly |
| Low pitch | Waves far apart | Values change slowly |
Try it yourself
See a voice as a wave
Change the loudness and pitch, and watch the wave and its numbers change.
Common mistakes
- Thinking computers store sound as sound. They store numbers measured from the wave.
- Mixing up loudness and pitch. Loudness is how tall the wave is; pitch is how close together the waves are.
- Thinking a few samples are enough. Clear audio needs thousands every second.
Check yourself
Summary
- Sound is a wave; a microphone turns it into a signal.
- The computer stores thousands of samples per second as numbers.
- AI learns which patterns of numbers mean which words or sounds.
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