Signal Analysis

Signal generation combining sinusoidal waves and signal analysis using fourier transform

Signal Generator

Simple signal produced by

signal = amplitude _ cos( 2pi _ frequency _ time_array _ phase_angle )

Signal Generator Function

Vm = amplitude f = frequency p = phase angle

def signalGenerator(Vm, f, p):
    signal = Vm*np.cos(2*pi*f*t + p)
    return signal

generated signals

# Musical Notes
D = signalGenerator(1, 294, 0)  # D294
F = signalGenerator(1, 349, 0)  # F349
A = signalGenerator(1, 440, 0)  # A440
C = signalGenerator(1, 523, 0)  # C523

generated audio files 👇

D | F | A | C

# Signal Generator
s1 = signalGenerator(0.5, 400, pi)
s2 = s1*signalGenerator(0.5, 420, 2*pi)
s3 = s2*signalGenerator(1, 440, 0)
s4 = s3*signalGenerator(1, 520, pi/2)

s5 = scipy.signal.square(2*pi*400*t+0)
Signal = s4*s5

generated audio files 👇

Test Signal 1 | Test Signal 2 | Test Signal 3 | Test Signal 4