John is on the phone with his best friend and can perceive the distinctive pitch of his voice (around 150 Hz) despite using an audio speaker which cannot generate frequencies below 300 Hz. This is an example of:

Question

Quizplus · Accepted Answer

This is an example of the "missing fundamental" phenomenon, where the brain perceives a fundamental frequency even if it is missing from the actual sound wave due to the presence of higher harmonics. In this case, John's brain is able to perceive the fundamental frequency of his friend's voice despite the audio speaker only producing higher harmonics above 300 Hz.

John Is on the Phone with His Best Friend and Can