Perception of missing fundamental and consideration on its characteristics

It is considered that pitch of f₀ is produced in the auditory center when we hear a complex tone of f₁ = n f₀ and T₂= (n+k) f₀. f₀ is known as missing fundamental. We confirm, by psycho-acoustic experiments, that we can hear missing fundamental. Furthermore, we investigate how a_if_i, and θ_i, in complex tones a₁sin(2πf₁t+θ₁)+a₂sin(2πf₂t+θ₂) in low frequency region, influence on producing f₀ . The low frequency region ( 250 Hz∼1000 Hz ) is chosen for considering the mechanism of perceiving missing fundamental without influence of spontaneous discharge and refractory period. The results of experiments are discussed by significant difference test. Finally, we confirm, by psycho-acoustic experiments, that we can hear missing fundamental in frequency region higher than 1000 Hz.