signal)# 绘制信号plt.title('Square Wave Signal')plt.xlabel('Time (s)')plt.ylabel('Amplitude')# 绘制FFT结果plt.subplot(2,1,2)# 子图布局plt.plot(fft_freq,np.abs(fft_result))# 绘制频谱(取绝对值)plt.title('FFT of Square Wave Signal')plt.xlabel('Frequency (Hz)')plt.ylabel('Magnitude...
plot(t,x) X = abs(fft(x)); bins = (0:(N-1)); f = (bins*fs)/N; intN = ceil(N/2); figure(2) plot(f(1:intN),X(1:intN)) xlabel('Frequency (Hz)') ylabel('Amplitude'); title('FFT Spectrum of Square Wave with 100kHz Frequency and 50% Duty Cycle'); ...
## LICENSE: WTFPL import matplotlib.pyplot as plt import scipy.fftpack import numpy as np import simpleaudio as sa ## %matplotlib inline lf_sigFreq = 1000.0 # typical 440 Hz lf_sigAmp = 0.99 # 0 dB li_fsam = 44100 # 44100 samples per sec li_durSec = 2 # Duration of li_durSec ...
fft_size= 256#计算方波和其FFTx, y =square_wave(fft_size) fy= np.fft.fft(y) /fft_size#绘制三角波的FFT的前20项的振幅,由于不含下标为偶数的值均为0, 因此取#log之后无穷小,无法绘图,用np.clip函数设置数组值的上下限,保证绘图正确pl.figure()#np.clip(x,3,8):给数值设定范围,对于小于3的数...
This method is based on fast fourier transform square wave voltammetric (FFT-SWV) determination of MTM at a molecularly imprinted polymer (MIP)/multi-walled carbon nanotube (MWCNTs)-modified carbon paste electrode. Voltammetric techniques development for electrochemical assay of MTM is a challenge, ...
Often we are confronted with the need to generate simple, standard signals (sine, cosine, Gaussian pulse, squarewave, isolated rectangular pulse, exponential decay, chirp signal) for simulation purpose. I intend to show (in a series of articles) how these basic signals can be generated in ...
This video shows the creation of a 500 Hz square wave as a time signal and spectrum. How to measure? The portable audio and acoustic analyzer XL2 is ideally suited for fast and simple FFT analysis up to 20 kHz. For multi-channel and more detailed analysis or calculations, a more powerful...
1. Wave equation and the finite difference method 1. Imaging 3. Boundary saving scheme Design information of L1 primitives 1. Stencil2D 1. RTM2D Forward streaming module Backward streaming module 3. Stencil3D 1. RTM3D Conjugate Gradient Solver Introduction Conjugate Gradient Algorith...
Touch the sine wave icon to bring up the built-in generator. You can select your signal type, and for sine and square waves, the signal frequency. Note that digitally-produced square waves start to alias badly above about 2000 Hz, so you will get audio artifacts. ...
Power scaling outputs the square of the input signal unit: \[[U_{input}^2]\] Power scaling is chosen for the same reasons as Linear scaling. But while Linear scaling is proportional to the input unit, Power scaling is proportional to the power of the input unit. This has some advantag...