23 lines
866 B
Matlab
23 lines
866 B
Matlab
function output = amplifyFreqRange(input, fs, low, high, multiplier)
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%Amplifies frequencies within a specified range, leaves all other
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%frequencies the same.
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%By Conner Hsu
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%input: 1D array representing the sound signal in the time domain
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%fs: sampling frequency
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%low: a scalar representing the lower bound of frequencies to be amplified
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%high: a scalar representing the upper bound of frequencies to be amplified
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%multiplier: a scalar that multiplies frequencies between low and high
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%Returns modified signal in the time domain.
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len = length(input);
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f = fs*(-len/2:len/2-1)/len;
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outputW = fftshift(fft(input));
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for i = 1:length(outputW)
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if (low < abs(f(i)) && abs(f(i)) < high)
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outputW(i) = outputW(i)*multiplier;
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end
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end
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output = real(ifft(fftshift(outputW)));
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end |