Which approaches do many early childhood programs use currently?

Sensory stimulation below a person's absolute threshold for conscious perception is called ______ _______

Fill in the blank(s) with correct word

Which theory maintains that the tiny fibers on the basilar membrane of the inner ear are stimulated by different frequencies of sound, with shorter fibers responding to higher frequencies?

a. Doctrine of specific nerve energies b. Resonance place theory c. Auditory harp theory d. Trichromatic theory