Introduction to Audio Analysis

List of Figures

Figure 2.1	A synthetic audio signal.	12
Figure 2.2	A STEREO audio signal.	14
Figure 2.3	Short-term processing of an audio signal.	26
Figure 3.1	Plots of the magnitude of the spectrum of a signal consisting of three frequencies at 200, 500, and 1200 Hz.	38
Figure 3.2	A synthetic signal consisting of three frequencies is corrupted by additive noise.	40
Figure 3.3	The spectrogram of a speech signal.	41
Figure 3.4	Spectrograms of a synthetic, frequency-modulated signal for three short-term frame lengths.	42
Figure 3.5	Spectrum representations of (a) an analog signal, (b) a sampled version when the sampling frequency exceeds the Nyquist rate, and (c) a sampled version with insufficient sampling frequency. In the last case, the shifted versions ...