What is the objective term that corresponds to the subjective term "pitch"?

The objective term that corresponds to the subjective term "pitch" is frequency. Pitch refers to how high or low a sound seems to a listener, and it is perceived based on the frequency of sound waves. Frequency, measured in hertz (Hz), quantifies the number of cycles of a sound wave that occur in one second. Higher frequencies correspond to higher pitches, while lower frequencies correspond to lower pitches. This objective measure connects directly to how we experience and interpret sound, allowing for a clear correlation between the physical property of sound and our perception of it.

Other terms like amplitude, wavelength, and velocity relate to different aspects of sound. Amplitude deals with the loudness or intensity of a sound, affecting how we perceive its volume rather than its pitch. Wavelength is the distance between successive peaks of the sound wave and is indirectly related to frequency, but does not directly define pitch in the listener's experience. Velocity refers to the speed at which sound travels through a medium, which is not directly tied to how high or low a sound is perceived.