How is a keyboard able to produce such varied sounds as that of a flute, an electric guitar, or a church bell?
A) by combining different sine waves
B) by artificially producing vibrations in the cochlea
C) by producing an artificially determined proximal stimulus
D) by altering the patterns normally received by the hair cells

Question

Quizplus · Accepted Answer

Keyboards use a technique called synthesis, which involves combining sine waves at different frequencies to produce complex sounds that mimic instruments.

Answer: D
 Some keyboards also use sampling, which involves recording snippets of real instrument sounds and then digitally altering them to achieve different pitches or timbres. However, this method does not directly produce the sound of the instrument, but rather alters the pattern received by the hair cells.

How Is a Keyboard Able to Produce Such Varied Sounds