sinusoid with amplitude , frequency, samples, and sampling frequency?

2018 5 26
1 个回答
回答已采纳
更新时间：2018 5 27
9 次查看（30 天）

0 个投票

how can i generate a sinusoid with amplitude 0.1 , frequency 100 Hz, with 100,000 samples, and sampling frequency 22,050 HZ? Please can anyone help me? thank you

请先登录，再回答此问题。

 采纳的回答

Image Analyst
Image Analyst 2018-5-26

0 个投票

Did you try this?
amplitude = 0.1;
frequency = 100 % Hz
numSamples = 100000 % samples
samplingFrequency = 22050 % Hz (per second)
numSeconds = numSamples / samplingFrequency
x = linspace(0, numSeconds, numSamples);
y = amplitude * sin(2 * pi * x * frequency);
plot(x, y, 'b-', 'LineWidth', 2);
grid on;
xlabel('X', 'FontSize', 15);
ylabel('Y', 'FontSize', 15);

5 个评论
显示 3更早的评论 隐藏 3更早的评论

john khnayzir
john khnayzir 2018-5-26
thank you very much, but when i save the signal in a .wav file , i do not have any tone.
Image Analyst
Image Analyst 2018-5-26
编辑：Image Analyst 2018-5-26
I hear something. Add this to the end of your code and turn up your speakers:
soundsc(y, samplingFrequency);
Also see attached demo on making a wav file.
john khnayzir
john khnayzir 2018-5-27
thank you very much, it is working. and how can i plot the spectrum of the signal? the signal is on the file.
Image Analyst
Image Analyst 2018-5-27
Call fft() or pwelch() followed by plot(), or call spectrogram().

请先登录，再进行评论。

更多回答（0 个）

类别

在 帮助中心 和 File Exchange 中查找有关 Audio I/O and Waveform Generation 的更多信息

标签

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by