MATLAB Code, Lab Report and a Power Point Presentation

function output = yes_no(x,fs) % function output = yes_no(x,fs) % Very simple algorithm for deciding whether the audio signal % in vector x is the word 'yes' or 'no'. % x (vector) speech signal % fs (scalar) sampling frequency in Hz % output (string) 'yes' or 'no' threshold = 12; % threshold value N = length(x); k1 = round(N*5000/fs); % FFT component corresponding to 5000 Hz k2 = round(N*11025/fs); % FFT component corresponding to 11025 Hz X = abs(fft(x)); f = sum(X(1:k1))/sum(X(k1:k2)); % calculate feature if f < threshold, output = 'yes'; % if feature is below threshold, return 'yes' else output = 'no'; % if feature is above threshold, return 'no' end