1.(10%) The magnitude response of short-time Fourier transform of a sentence is shown in Figure 1. It is called the spec

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1 10 The Magnitude Response Of Short Time Fourier Transform Of A Sentence Is Shown In Figure 1 It Is Called The Spec 1 (410.32 KiB) Viewed 33 times

1.(10%) The magnitude response of short-time Fourier transform of a sentence is shown in Figure 1. It is called the spectrogram. The window length of the short-time Fourier transform determines the frequency resolution. Therefore, what modifications have to be done in order to show the harmonic structure (fundamental frequency + higher harmonic series) in the spectrogram? What kind of information will be lost when the harmonic structure appears in the spectrogram? (Hint: time/frequency resolution trade-off.) (a) (5%) Is this spectrogram relatively wideband or narrowband? State your reasons. (b) (5%) What is the most possible sampling frequency? State your reasons. 8 7 6 seven is less than ten. Frequency (kHz) 1 Two plus