Which phrase defines 'inaudible' sounds?

The phrase that defines 'inaudible' sounds is indeed described by the notion of sounds that cannot be heard. 'Inaudible' derives from the Latin root 'audire,' which means to hear. When something is classified as inaudible, it indicates that the sound is below the threshold of hearing for a given individual or environment, thus rendering it impossible for that person to perceive the sound.

In contrast, overwhelming loudness, ease of understanding, and clarity of sound imply a presence or perception of sound, which directly contradicts the essence of inaudibility. Understanding 'inaudible' in this precise context underscores the importance of recognizing the limits of human auditory perception.