Final answer:
The three dimensions of physical sound are frequency, amplitude, and timbre, which correspond to pitch, loudness, and tone quality respectively.
Step-by-step explanation:
The three dimensions of physical sound are frequency, amplitude, and timbre. These perceptually correspond to pitch, loudness, and tone quality respectively. The frequency of a sound wave is associated with our perception of that sound's pitch, with high-frequency sound waves being perceived as high-pitched, and low-frequency sound waves as low-pitched.
Amplitude relates to the loudness of sound, where larger amplitudes are perceived as louder sounds. Lastly, timbre, also known as tone quality, is affected by the complex interplay of frequency, amplitude, and timing of sound waves, and is how we can distinguish between different instruments playing the same note.