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Table 1 The signals used in each presentation can be separated into three groups with different interval sizes, each consisting of 6 tone pairs with two references D and G# in octaves 3, 4, and 5.

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

Groups

Semitone intervals

1

D3, D3#

D4, D4#

D5, D5#

G3#, A3

G4#, A4

G5#, A5

 

3

D3, F3

D4, F4

D5, F5

G3#, B3

G4#, B4

G5#, B5

 

6

D3, G3#

D4, G4#

D5, G5#

G3#, D4

G4#, D5

G5#, D6