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EURASIP Journal on Audio, Speech, and Music Processing
Figure 7 | EURASIP Journal on Audio, Speech, and Music Processing

Figure 7

From: Pitch Ranking, Melody Contour and Instrument Recognition Tests Using Two Semitone Frequency Maps for Nucleus Cochlear Implants

Figure 7

Spectrogram of the AMO output for the MCI rise-fall pattern in octave 5 with 1-semitone intervals and fundamental frequency of the root note equals 880 Hz, processed with Smt-LF mapping. Only the fundamental frequencies are left after Smt-LF has filtered out partials above 1502 Hz. The Smt-LF output is then resynthesized in the AMO using the tonotopical frequencies at the corresponding electrode positions, which results in a transposition of the center activity to around 4000 Hz [2].

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