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. 2014 May 28;9(5):e97467. doi: 10.1371/journal.pone.0097467

Figure 2. Acoustic analyses of stimulus S1.

Figure 2

A) Waveform, B) spectrogram, C) amplitude envelope, and D) diagram of stimulus S1 (cf. Fig. 1). The spectrogram was calculated with a Short Time Fourier Transform, Gaussian window, window size 2 ms, time resolution 5 ms, frequency resolution 20 Hz, and 50 dB dynamic range. The amplitude envelope was calculated using a loudness model as described in [43].