Learning Mission

Make Your Own Sound Wave

Choose a waveform, change its frequency and amplitude, inspect the shape, and optionally listen to the tone.

The tool opens silently. Keep your device volume low before starting sound in any section.

Investigate simple sound waves

Choose one wave shape, change its frequency and amplitude, inspect it, and listen to that simple sound.

440 Hz
Lower pitchHigher pitch
50%
Smaller waveLarger wave

Hearing safety: Amplitude changes the waveform display strongly, but the audio output is capped at a quiet level.

Quick experiments

Waveform display

Sound off
Sine wave preview
Wave typeSine
Period2.27 ms
Cycles shown4.4
Pitch rangeMiddle
Sine waveA smooth repeating curve with one pure fundamental frequency.

Make Your Own Sound

Build a combined wave by choosing a wave shape, setting its frequency, amplitude, and phase, then adding it to the mix.

Sine
220 Hz
LowerHigher
45%
SmallerLarger
0°
0°360°
Wave preview
Waves added0
Current waveSine
Phase0°
DisplayPreview

    The canvas previews the wave you are preparing. Add waves to the list, then use Show Combined Wave Form to see their sum.

    Investigate real sounds

    Use your microphone to see the waveform from your voice, clapping, humming, whistling, or nearby sounds. Freeze holds the clearest recent waveform, so short sounds are easier to catch.

    Microphone off
    Microphone waveform
    Input level meter0%
    Dominant frequency-- Hz
    Musical note--
    Input level0%

    Dominant frequency is the strongest pitch-like vibration the microphone detects at that moment.

    Musical note is the nearest piano-style note to that frequency, so it is approximate for speech and noisy sounds.

    Privacy notice: audio is processed locally in your browser and is not uploaded on any server.

    Compare the four wave shapes

    The shapes have the same frequency and amplitude, but their corners and slopes differ.