Resolved v. unresolved harmonics
Text Box: Relative amplitude (dB)
Frequency (kHz)
360     440      540      660      800     1020    1200
200    400   600   800    1000    1200
Level
(dB)
Frequency (Hz)
f0 = 200 Hz
Text Box: Relative amplitude (dB)
Frequency (kHz)
220    440   660   880    1100    1320
Level
(dB)
Frequency (Hz)
f0 = 220 Hz
   360      440      540      660      800     1020    1200
To understand the results of studies that test these theories you have to understand the difference between resolved and unresolved harmonics. Resolved harmonics fall into different auditory filters. A different set of harmonics will create a different activity pattern across auditory filters.