基于MATLAB实现的语音信号通过低通，高通，带通滤波器使其变声+GUI界面+使用说明文档

function varargout = shuzi_0301(varargin) % SHUZI_0301 M-file for shuzi_0301.fig % SHUZI_0301, by itself, creates a new SHUZI_0301 or raises the existing % singleton*. % % H = SHUZI_0301 returns the handle to a new SHUZI_0301 or the handle to % the existing singleton*. % % SHUZI_0301('CALLBACK',hObject,eventData,handles,...) calls the local % function named CALLBACK in SHUZI_0301.M with the given input arguments. % % SHUZI_0301('Property','Value',...) creates a new SHUZI_0301 or raises the % existing singleton*. Starting from the left, property value pairs are % applied to the GUI before shuzi_0301_OpeningFcn gets called. An % unrecognized property name or invalid value makes property application % stop. All inputs are passed to shuzi_0301_OpeningFcn via varargin. % % *See GUI Options on GUIDE's Tools menu. Choose "GUI allows only one % instance to run (singleton)". % % See also: GUIDE, GUIDATA, GUIHANDLES % Edit the above text to modify the response to help shuzi_0301 % Last Modified by GUIDE v2.5 09-Dec-2013 10:43:34 % Begin initialization code - DO NOT EDIT gui_Singleton = 1; gui_State = struct('gui_Name', mfilename, ... 'gui_Singleton', gui_Singleton, ... 'gui_OpeningFcn', @shuzi_0301_OpeningFcn, ... 'gui_OutputFcn', @shuzi_0301_OutputFcn, ... 'gui_LayoutFcn', [] , ... 'gui_Callback', []); if nargin && ischar(varargin{1}) gui_State.gui_Callback = str2func(varargin{1}); end if nargout [varargout{1:nargout}] = gui_mainfcn(gui_State, varargin{:}); else gui_mainfcn(gui_State, varargin{:}); end % End initialization code - DO NOT EDIT % --- Executes just before shuzi_0301 is made visible. function shuzi_0301_OpeningFcn(hObject, eventdata, handles, varargin) % This function has no output args, see OutputFcn. % hObject handle to figure % eventdata reserved - to be defined in a future version of MATLAB % handles structure with handles and user data (see GUIDATA) % varargin command line arguments to shuzi_0301 (see VARARGIN) % Choose default command line output for shuzi_0301 handles.output = hObject; % Update handles structure guidata(hObject, handles); % UIWAIT makes shuzi_0301 wait for user response (see UIRESUME) % uiwait(handles.figure1); % --- Outputs from this function are returned to the command line. function varargout = shuzi_0301_OutputFcn(hObject, eventdata, handles) % varargout cell array for returning output args (see VARARGOUT); % hObject handle to figure % eventdata reserved - to be defined in a future version of MATLAB % handles structure with handles and user data (see GUIDATA) % Get default command line output from handles structure varargout{1} = handles.output; % --- Executes on button press in pushbutton1. function pushbutton1_Callback(hObject, eventdata, handles) % hObject handle to pushbutton1 (see GCBO) % eventdata reserved - to be defined in a future version of MATLAB % handles structure with handles and user data (see GUIDATA) %采集并画出原始信号波形 fs=handles.fs;% fs=22050; %语音信号采样频率为22050 [x1,fs,bits]=wavread('love.wav'); %读取语音信号的数据，赋给变量x1 sound(x1,fs); %播放语音信号 plot(handles.axes1,x1) ; %做原始语音信号的时域图形 title(handles.axes1,'原始语音信号');xlabel(handles.axes1,'time n'); ylabel(handles.axes1,'fuzhi n'); function fs_Callback(hObject, eventdata, handles) % hObject handle to edit3 (see GCBO) % eventdata reserved - to be defined in a future version of MATLAB % handles structure with handles and user data (see GUIDATA) % Hints: get(hObject,'String') returns contents of edit3 as text % str2double(get(hObject,'String')) returns contents of edit3 as a double fs=str2double(get(hObject,'String')); handles.fs=fs; guidata(hObject,handles); % --- Executes during object creation, after setting all properties. function fs_CreateFcn(hObject, eventdata, handles) % hObject handle to edit3 (see GCBO) % eventdata reserved - to be defined in a future version of MATLAB % handles empty - handles not created until after all CreateFcns called % Hint: edit controls usually have a white background on Windows. % See ISPC and COMPUTER. if ispc && isequal(get(hObject,'BackgroundColor'), get(0,'defaultUicontrolBackgroundColor')) set(hObject,'BackgroundColor','white'); end function N_Callback(hObject, eventdata, handles) % hObject handle to N (see GCBO) % eventdata reserved - to be defined in a future version of MATLAB % handles structure with handles and user data (see GUIDATA) % Hints: get(hObject,'String') returns contents of N as text % str2double(get(hObject,'String')) returns contents of N as a double N=str2double(get(hObject,'String')); handles.N=N; guidata(hObject,handles); % --- Executes during object creation, after setting all properties. function N_CreateFcn(hObject, eventdata, handles) % hObject handle to N (see GCBO) % eventdata reserved - to be defined in a future version of MATLAB % handles empty - handles not created until after all CreateFcns called % Hint: edit controls usually have a white background on Windows. % See ISPC and COMPUTER. if ispc && isequal(get(hObject,'BackgroundColor'), get(0,'defaultUicontrolBackgroundColor')) set(hObject,'BackgroundColor','white'); end % --- Executes on button press in pushbutton2. function pushbutton2_Callback(hObject, eventdata, handles) % hObject handle to pushbutton2 (see GCBO) % eventdata reserved - to be defined in a future version of MATLAB % handles structure with handles and user data (see GUIDATA) N=handles.N; fs=handles.fs; [x1,fs,bits]=wavread('love.wav'); %读取语音信号的数据，赋给变量x1 y1=fft(x1); %对信号做FFT变换 %f=fs*(1:length(x1))/length(x1); plot(handles.axes2,abs(y1)); title(handles.axes2,'原始语音信号频谱') xlabel(handles.axes2,'Hz');ylabel(handles.axes2,'fuzhi'); % --- Executes on button press in pushbutton3. function pushbutton3_Callback(hObject, eventdata, handles) % hObject handle to pushbutton3 (see GCBO) % eventdata reserved - to be defined in a future version of MATLAB % handles structure with handles and user data (see GUIDATA) % --- Executes on selection change in pop. function pop_Callback(hObject, eventdata, handles) % hObject handle to pop (see GCBO) % eventdata reserved - to be defined in a future version of MATLAB % handles structure with handles and user data (see GUIDATA) % Hints: contents = cellstr(get(hObject,'String')) returns pop contents as cell array % contents{get(hObject,'Value')} returns selected item from pop % --- Executes during object creation, after setting all properties. function pop_CreateFcn(hObject, eventdata, handles) % hObject handle to pop (see GCBO) % eventdata reserved - to be defined in a future version of MATLAB % handles empty - handles not created until after all CreateFcns called % Hint: popupmenu controls usually have a white background on Windows. % See ISPC and COMPUTER. if ispc && isequal(get(hObject,'BackgroundColor'), get(0,'defaultUicontrolBackgroundColor')) set(hObject,'BackgroundColor','white'); end % --- Executes on button press in pushbutton4. function pushbutton4_Callback(hObject, eventdata, handles) % hObject handle to pushbutton4 (see GCBO) % eventdata reserved - to be defined in a future version of MATLAB % handles structure with handles and user data (see GUIDATA) %设计数字滤波器 %ft=handles.edit3; %Fp=str2num(get(handles.edit3,'string')); %Fs=str2num(get(handles.edit4,'string')); str=get(handles.pop,'string'); val=get(handles.pop,'value'); switch str{val}; case 'low' Fs=4000;Ts=1/Fs; wp=2*pi*1000;ws=2*pi*1200;Rp=1;Rs=100; wp1=2*Fs*tan(wp*Ts/2); ws1=2*Fs*tan(ws*Ts/2); [N,Wn]=buttord(wp1,ws1,Rp,Rs,'s'); %选择滤�