matlab数据信号处理问题

Question

用MATLAB 进行男声和女声录音的频谱分析，指出频谱特征，然后尝试将男声变成女声和女声变成男声并分析频谱。

请问一下这个的代码怎么写呀(⁄ ⁄•⁄ω⁄•⁄ ⁄)

Answer 1

下面是在MATLAB中进行频谱分析和语音修改的步骤：

加载音频文件：使用 MATLAB 中的“audioread”函数加载包含男性和女性录音的音频文件。

执行短时傅立叶变换 (STFT)：使用 MATLAB 中的“频谱图”功能对音频信号执行 STFT。 这将提供音频信号的时频表示。

绘制频谱图：绘制男性和女性录音的频谱图以可视化其频谱特征。

修改声音：使用数字信号处理技术，例如音高变换、共振峰变换或重采样，将声音从男性修改为女性或将女性修改为男性。

重新分析修改后的语音：对修改后的语音重新执行 STFT 并绘制频谱图，以查看频谱特性发生了怎样的变化。

分析频谱特征：分析原始和修改后的录音的频谱特征，例如不同频段的能量分布，并比较结果以识别男声和女声之间的差异。

下面是演示上述步骤的示例代码：

% Load the audio files
[maleVoice, maleFs] = audioread('maleVoice.wav');
[femaleVoice, femaleFs] = audioread('femaleVoice.wav');

% Perform STFT on the audio signals
maleSpectrogram = spectrogram(maleVoice, 1024, 512, [], maleFs, 'yaxis');
femaleSpectrogram = spectrogram(femaleVoice, 1024, 512, [], femaleFs, 'yaxis');

% Plot the spectrogram
figure;
subplot(2,1,1);
spectrogram(maleVoice, 1024, 512, [], maleFs, 'yaxis');
title('Male Voice Spectrogram');

subplot(2,1,2);
spectrogram(femaleVoice, 1024, 512, [], femaleFs, 'yaxis');
title('Female Voice Spectrogram');

% Modify the voice
modifiedMaleVoice = pitch_shift(maleVoice, maleFs, -0.5);
modifiedFemaleVoice = pitch_shift(femaleVoice, femaleFs, 0.5);

% Re-analyze the modified voice
modifiedMaleSpectrogram = spectrogram(modifiedMaleVoice, 1024, 512, [], maleFs, 'yaxis');
modifiedFemaleSpectrogram = spectrogram(modifiedFemaleVoice, 1024, 512, [], femaleFs, 'yaxis');

% Plot the spectrogram of modified voice
figure;
subplot(2,1,1);
spectrogram(modifiedMaleVoice, 1024, 512, [], maleFs, 'yaxis');
title('Modified Male Voice Spectrogram');

subplot(2,1,2);
spectrogram(modifiedFemaleVoice, 1024, 512, [], femaleFs, 'yaxis');
title('Modified Female Voice Spectrogram');

% Analyze the spectral characteristics
maleEnergy = mean(abs(maleSpectrogram).^2, 2);
modifiedMaleEnergy = mean(abs(modifiedMaleSpectrogram).^2, 2);

femaleEnergy = mean(abs(femaleSpectrogram).^2, 2);
modifiedFemaleEnergy = mean(abs(modifiedFemaleSpectrogram).^2, 2);

figure;
plot(maleEnergy, 'b');
hold on;
plot(modifiedMaleEnergy, 'r');
title('Male Voice Energy Distribution');
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