1.要求：

目前大夫主要以听诊器倾听病人的气管、肺部区域的声音，对病人的疾病进行判断；请设计一个听诊的软件，要求如下：
1）可记录病人的姓名、年龄、性别、病史、不同疾病部位等状况；
2）对病人的气管、肺部等区域的声音进行采集、分析、存储（前端听诊
部分不用考虑，只考虑数据采集部分）。
3）可分析不同声音分量的大小，给出频谱图，以及主要频率的幅度，便
于大夫分析和验证；
4）由于采集到的信号经常存在某些干扰信号，比如心脏的震动，请设计
低通、带通、带阻滤波器对信号处理，滤波器参数在用户界面中可以进行设
置，方便医生进行使用；
5）编制 GUI 用户界面，实现上述所有功能。

2.实现

classdef app1 < matlab.apps.AppBase
    % Properties that correspond to app components
    properties (Access = public)
        UIFigure          matlab.ui.Figure
        Label_6           matlab.ui.control.Label
        Button_6          matlab.ui.control.Button
        Button_5          matlab.ui.control.Button
        Button_4          matlab.ui.control.Button
        Button_3          matlab.ui.control.Button
        Button_2          matlab.ui.control.Button
        EditField_6       matlab.ui.control.EditField
        Label_5           matlab.ui.control.Label
        Button            matlab.ui.control.Button
        EditField_5       matlab.ui.control.EditField
        EditField_5Label  matlab.ui.control.Label
        EditField_4       matlab.ui.control.EditField
        Label_4           matlab.ui.control.Label
        EditField_3       matlab.ui.control.EditField
        EditField_3Label  matlab.ui.control.Label
        EditField_2       matlab.ui.control.EditField
        Label_3           matlab.ui.control.Label
        EditField         matlab.ui.control.EditField
        EditFieldLabel    matlab.ui.control.Label
        DropDown          matlab.ui.control.DropDown
        Label             matlab.ui.control.Label
        UIAxes4           matlab.ui.control.UIAxes
        UIAxes3           matlab.ui.control.UIAxes
        UIAxes2           matlab.ui.control.UIAxes
        UIAxes            matlab.ui.control.UIAxes
    end
    % Callbacks that handle component events
    methods (Access = private)
        % Code that executes after component creation
        function startupFcn(app)
            app.Label_6.Text = '4156';  
              global strname;
              global strage;
              global strsex;
              global strmedical;
              global strdds;
              global strpath;
              strname =     ["病人1名字","病人2名字","病人3名字","病人4名字","病人5名字","病人6名字","病人7名字","病人8名字","病人9名字","病人10名字"];
              strage =      ["病人1年龄","病人2年龄","病人3年龄","病人4年龄","病人5年龄","病人6年龄","病人7年龄","病人8年龄","病人9年龄","病人10年龄"];
              strsex =      ["病人1性别","病人2性别","病人3性别","病人4性别","病人5性别","病人6性别","病人7性别","病人8性别","病人9性别","病人10性别"];
              strmedical =  ["病人1病史","病人2病史","病人3病史","病人4病史","病人5病史","病人6病史","病人7病史","病人8病史","病人9病史","病人10病史"];
              strdds =      [   "病人1生病部位","病人2生病部位","病人3生病部位","病人4生病部位","病人5生病部位","病人6生病部位","病人7生病部位","病人8生病部位","病人9生病部位","病人10生病部位"];
              strpath =     ["1.m4a","2.m4a","3.m4a","4.m4a","5.m4a","6.m4a","7.m4a","8.m4a","9.m4a","10.m4a"];
        end
        % Value changed function: DropDown
        function DropDownValueChanged(app, event)
%             app.Label_2.Text = app.DropDown.Value; 
%             
              global strname;
              global strage;
              global strsex;
              global strmedical;
              global strdds;
              global strpath;
              sequence = int8(str2double(app.DropDown.Value));
              app.EditField.Value = strname(sequence);
              app.EditField_2.Value = strage(sequence);
              app.EditField_3.Value = strsex(sequence);
              app.EditField_4.Value = strmedical(sequence);
              app.EditField_5.Value = strdds(sequence);
              app.EditField_6.Value = strpath(sequence);
        end
        % Drop down opening function: DropDown
        function DropDownOpening(app, event)
        end
        % Button pushed function: Button_2
        function Button_2Pushed(app, event)
%           filterDesigner;
            anpath = strcat(app.EditField_6.Value);
            [y1,fs]=audioread(anpath);  
            y1=y1(:,1);%取单列
            global global_y1 global_fs;
            global_y1 = y1;
            global_fs = fs;
            N1=length(y1);                  %求信号长度
            n=0:N1-1;                       %所有元素
            t1=n/fs;                        %时间
            f1=-24000:fs/N1:fs*(N1-1)/N1-24000;        %频率
            Y1=fftshift(fft(y1,N1));                %傅里叶变换
            ratio = app.EditField.Value;
            sound(y1,fs);
            plot(app.UIAxes,t1,y1);
            app.UIAxes.XLim = [0 2.5];
            app.UIAxes.XTick = 0:0.5:2.5;
            plot(app.UIAxes2,f1,abs(Y1));
            app.UIAxes2.XLim = [-5000 5000];
            app.UIAxes2.XTick = -5000:500:5000;
        end
        % Button pushed function: Button
        function ButtonPushed(app, event)
              global strname;
              global strage;
              global strsex;
              global strmedical;
              global strdds;
             sequence = int8(str2double(app.DropDown.Value));
              strname(sequence) = app.EditField.Value;
              strage(sequence) = app.EditField_2.Value;
              strsex(sequence) = app.EditField_3.Value;
              strmedical(sequence) = app.EditField_4.Value;
              strdds(sequence) = app.EditField_5.Value;
              strpath(sequence) = app.EditField_6.Value;
        end
        % Window scroll wheel function: UIFigure
        function UIFigureWindowScrollWheel(app, event)
            verticalScrollAmount = event.VerticalScrollAmount;
            verticalScrollCount = event.VerticalScrollCount;
        end
        % Close request function: UIFigure
        function UIFigureCloseRequest(app, event)
            delete(app)
        end
        % Button pushed function: Button_3
        function Button_3Pushed(app, event)
            global global_y1 global_fs;
            fs = global_fs;
            LPF_Coe = load('lpf.mat'); %低通滤波
            y2 = filter(LPF_Coe.Num,1,global_y1);
            N2=length(y2);
            k=0:1:N2-1;
            t2=k/fs;
            f2=-24000:fs/N2:fs*(N2-1)/N2-24000;
            Y2=fftshift(fft(y2,N2));
            plot(app.UIAxes3,t2,y2);
            app.UIAxes3.XLim = [0 2.5];
            app.UIAxes3.XTick = 0:0.5:2.5;
            plot(app.UIAxes4,f2,abs(Y2));
            app.UIAxes4.XLim = [-5000 5000];
            app.UIAxes4.XTick = -5000:500:5000;
        end
        % Button pushed function: Button_6
        function Button_6Pushed(app, event)
            filterDesigner;
        end
        % Button pushed function: Button_4
        function Button_4Pushed(app, event)
            global global_y1 global_fs;
            fs = global_fs;
            BPF_Coe = load('bpf.mat'); %带通滤波
            y2 = filter(BPF_Coe.Num,1,global_y1);
            N2=length(y2);
            k=0:1:N2-1;
            t2=k/fs;
            f2=-24000:fs/N2:fs*(N2-1)/N2-24000;
            Y2=fftshift(fft(y2,N2));
            plot(app.UIAxes3,t2,y2);
            app.UIAxes3.XLim = [0 2.5];
            app.UIAxes3.XTick = 0:0.5:2.5;
            plot(app.UIAxes4,f2,abs(Y2));
            app.UIAxes4.XLim = [-5000 5000];
            app.UIAxes4.XTick = -5000:500:5000;
        end
        % Button down function: UIAxes4
        function UIAxes4ButtonDown(app, event)
        end
        % Button pushed function: Button_5
        function Button_5Pushed(app, event)
            global global_y1 global_fs;
            fs = global_fs;
            HPF_Coe = load('hpf.mat'); %高通滤波
            y2 = filter(HPF_Coe.Num,1,global_y1);
            N2=length(y2);
            k=0:1:N2-1;
            t2=k/fs;
            f2=-24000:fs/N2:fs*(N2-1)/N2-24000;
            Y2=fftshift(fft(y2,N2));
            plot(app.UIAxes3,t2,y2);
            app.UIAxes3.XLim = [0 2.5];
            app.UIAxes3.XTick = 0:0.5:2.5;
            plot(app.UIAxes4,f2,abs(Y2));
            app.UIAxes4.XLim = [-5000 5000];
            app.UIAxes4.XTick = -5000:500:5000;
        end
    end
    % Component initialization
    methods (Access = private)
        % Create UIFigure and components
        function createComponents(app)
            % Create UIFigure and hide until all components are created
            app.UIFigure = uifigure('Visible', 'off');
            app.UIFigure.AutoResizeChildren = 'off';
            app.UIFigure.Color = [0.9412 0.9412 0.9412];
            app.UIFigure.Position = [200 200 1063 592];
            app.UIFigure.Name = '数字听诊器    1802501  180200815     王世阳';
            app.UIFigure.CloseRequestFcn = createCallbackFcn(app, @UIFigureCloseRequest, true);
            app.UIFigure.WindowScrollWheelFcn = createCallbackFcn(app, @UIFigureWindowScrollWheel, true);
            app.UIFigure.WindowStyle = 'modal';
            % Create UIAxes
            app.UIAxes = uiaxes(app.UIFigure);
            title(app.UIAxes, 'Title')
            xlabel(app.UIAxes, 'X')
            ylabel(app.UIAxes, 'Y')
            zlabel(app.UIAxes, 'Z')
            app.UIAxes.Position = [346 284 300 185];
            % Create UIAxes2
            app.UIAxes2 = uiaxes(app.UIFigure);
            title(app.UIAxes2, 'Title')
            xlabel(app.UIAxes2, 'X')
            ylabel(app.UIAxes2, 'Y')
            zlabel(app.UIAxes2, 'Z')
            app.UIAxes2.Position = [666 284 300 185];
            % Create UIAxes3
            app.UIAxes3 = uiaxes(app.UIFigure);
            title(app.UIAxes3, 'Title')
            xlabel(app.UIAxes3, 'X')
            ylabel(app.UIAxes3, 'Y')
            zlabel(app.UIAxes3, 'Z')
            app.UIAxes3.Position = [346 13 300 185];
            % Create UIAxes4
            app.UIAxes4 = uiaxes(app.UIFigure);
            title(app.UIAxes4, 'Title')
            xlabel(app.UIAxes4, 'X')
            ylabel(app.UIAxes4, 'Y')
            zlabel(app.UIAxes4, 'Z')
            app.UIAxes4.ButtonDownFcn = createCallbackFcn(app, @UIAxes4ButtonDown, true);
            app.UIAxes4.Position = [685 13 300 185];
            % Create Label
            app.Label = uilabel(app.UIFigure);
            app.Label.HorizontalAlignment = 'right';
            app.Label.Position = [54 522 53 22];
            app.Label.Text = '病人序号';
            % Create DropDown
            app.DropDown = uidropdown(app.UIFigure);
            app.DropDown.Items = {'01', '02', '03', '04', '05', '06', '07', '08', '09', '10'};
            app.DropDown.DropDownOpeningFcn = createCallbackFcn(app, @DropDownOpening, true);
            app.DropDown.ValueChangedFcn = createCallbackFcn(app, @DropDownValueChanged, true);
            app.DropDown.Position = [122 522 100 22];
            app.DropDown.Value = '01';
            % Create EditFieldLabel
            app.EditFieldLabel = uilabel(app.UIFigure);
            app.EditFieldLabel.HorizontalAlignment = 'right';
            app.EditFieldLabel.Position = [82 461 29 22];
            app.EditFieldLabel.Text = '姓名';
            % Create EditField
            app.EditField = uieditfield(app.UIFigure, 'text');
            app.EditField.Position = [126 461 100 22];
            % Create Label_3
            app.Label_3 = uilabel(app.UIFigure);
            app.Label_3.HorizontalAlignment = 'right';
            app.Label_3.Position = [82 404 29 22];
            app.Label_3.Text = '年龄';
            % Create EditField_2
            app.EditField_2 = uieditfield(app.UIFigure, 'text');
            app.EditField_2.Position = [126 404 100 22];
            % Create EditField_3Label
            app.EditField_3Label = uilabel(app.UIFigure);
            app.EditField_3Label.HorizontalAlignment = 'right';
            app.EditField_3Label.Position = [82 351 29 22];
            app.EditField_3Label.Text = '性别';
            % Create EditField_3
            app.EditField_3 = uieditfield(app.UIFigure, 'text');
            app.EditField_3.Position = [126 351 100 22];
            % Create Label_4
            app.Label_4 = uilabel(app.UIFigure);
            app.Label_4.HorizontalAlignment = 'right';
            app.Label_4.Position = [82 284 29 22];
            app.Label_4.Text = '病史';
            % Create EditField_4
            app.EditField_4 = uieditfield(app.UIFigure, 'text');
            app.EditField_4.Position = [122 216 200 100];
            % Create EditField_5Label
            app.EditField_5Label = uilabel(app.UIFigure);
            app.EditField_5Label.HorizontalAlignment = 'right';
            app.EditField_5Label.Position = [61 165 53 22];
            app.EditField_5Label.Text = '不同疾病';
            % Create EditField_5
            app.EditField_5 = uieditfield(app.UIFigure, 'text');
            app.EditField_5.Position = [122 87 200 100];
            % Create Button
            app.Button = uibutton(app.UIFigure, 'push');
            app.Button.ButtonPushedFcn = createCallbackFcn(app, @ButtonPushed, true);
            app.Button.Position = [122 36 100 24];
            app.Button.Text = '存档/修改';
            % Create Label_5
            app.Label_5 = uilabel(app.UIFigure);
            app.Label_5.HorizontalAlignment = 'right';
            app.Label_5.Position = [388 522 77 22];
            app.Label_5.Text = '病人声音路径';
            % Create EditField_6
            app.EditField_6 = uieditfield(app.UIFigure, 'text');
            app.EditField_6.Position = [480 522 100 22];
            app.EditField_6.Value = '1.m4a';
            % Create Button_2
            app.Button_2 = uibutton(app.UIFigure, 'push');
            app.Button_2.ButtonPushedFcn = createCallbackFcn(app, @Button_2Pushed, true);
            app.Button_2.Position = [480 480 100 24];
            app.Button_2.Text = '绘制频谱图';
            % Create Button_3
            app.Button_3 = uibutton(app.UIFigure, 'push');
            app.Button_3.ButtonPushedFcn = createCallbackFcn(app, @Button_3Pushed, true);
            app.Button_3.Position = [381 225 100 24];
            app.Button_3.Text = '低通滤波';
            % Create Button_4
            app.Button_4 = uibutton(app.UIFigure, 'push');
            app.Button_4.ButtonPushedFcn = createCallbackFcn(app, @Button_4Pushed, true);
            app.Button_4.Position = [556 225 100 24];
            app.Button_4.Text = '带通滤波';
            % Create Button_5
            app.Button_5 = uibutton(app.UIFigure, 'push');
            app.Button_5.ButtonPushedFcn = createCallbackFcn(app, @Button_5Pushed, true);
            app.Button_5.Position = [732 225 100 24];
            app.Button_5.Text = '高通滤波';
            % Create Button_6
            app.Button_6 = uibutton(app.UIFigure, 'push');
            app.Button_6.ButtonPushedFcn = createCallbackFcn(app, @Button_6Pushed, true);
            app.Button_6.Position = [885 224 100 24];
            app.Button_6.Text = '更改滤波器参数';
            % Create Label_6
            app.Label_6 = uilabel(app.UIFigure);
            app.Label_6.Position = [686 501 35 22];
            % Show the figure after all components are created
            app.UIFigure.Visible = 'on';
        end
    end
    % App creation and deletion
    methods (Access = public)
        % Construct app
        function app = app1
            % Create UIFigure and components
            createComponents(app)
            % Register the app with App Designer
            registerApp(app, app.UIFigure)
            % Execute the startup function
            runStartupFcn(app, @startupFcn)
            if nargout == 0
                clear app
            end
        end
        % Code that executes before app deletion
        function delete(app)
            % Delete UIFigure when app is deleted
            delete(app.UIFigure)
        end
    end
end

3.路径读取

anpath = strcat(app.EditField_6.Value);
[y1,fs]=audioread(anpath);

4.读取到的字符串转成数组

            ratio = app.EditField.Value;
            ratio = 1000*str2double(ratio);

MATLAB知识

【课设】数字听诊器信号分析

1.要求：

2.实现

3.路径读取

4.读取到的字符串转成数组