Four sine waves, each fixed at 2 mV peak-to-peak, are summed in real time. Move the sliders to see how the time-domain signal and frequency-domain spectrum change.
Each slider controls one sine wave from 0 to 30 Hz.
Sum = Wave 1 + Wave 2 + Wave 3 + Wave 4
Peaks appear at the selected frequencies. Power is shown in dB using a single-sided normalized spectrum.
This view adds approximately 4 Hz of bandwidth around each component, producing broader spectral peaks.