Fourier Synthesis
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Applet by Fu-Kwun Hwang
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How to play:
- Left click and drag the [ball, green] circles to change the magnitude of each Fourier functions [Sin nf, Cos nf].
- Right click the mouse button to change the magnitude between 0 and 1.0
- Click Play to turn on the sound effect, Stop to turn it off.
- The coefficient of sin(0f) is used as amplification factor for all modes. (Use it to change the sound level) The coefficient of cos(0f) is the DC component.
- Clicking the checkbox at the top (after stopping) will show square the the amplitude of the signal.
The default value for base frequency is f=100Hz, you can change it from the TextField. (20 < f < 2000). The ear is 1000 times more sensitive at 1kHz than at 100Hz.
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Frequency range
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Speech
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Song
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Adult Male
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80 - 240
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Up to 700
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Adult Female
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140 - 500
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Up to 1100
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