Ratio pitch curve shape matches other psychoacoustic frequency-dependence curves

Evidence

Figure 5.2 shows en linear scales the relationship between ratio pitch and frequency. The proprotionality of frequency and ratio pitch at frequencies up to about 500 Hz becomes clear from the steep increase at the start of the curve near the origin. At higher frequencies, the curve bends more and more and rtaches a ratio pitch of only 2400 mel at a frequency near 16 kHz. A comparison of the dependence of ratio pitch on frequency as illustrated in Fig. 5.2 with the dependencies displayed in Figs. 6.9 and 7.9, indicates that all three curves show great similarity. This important correlation will be discussed in more detail in Chap. 7. — Professor Dr.-Ing. Hugo Fastl, Professor Dr.-Ing. Eberhard, Psychoacoustics- Facts and Models, 663