Question

these are the two objective (measurable) qualities of sound
intensity and loudness
frequency and pitch
pitch and loudness
loudness and pitch
frequency and intensity

Explanation:

• Frequency is a measurable physical property of sound waves (number of oscillations per second, measured in Hz).
• Intensity is also a measurable physical quantity (power per unit area, measured in \(W/m^{2}\)).
• Loudness is a subjective perception related to intensity (but not directly measurable in the same objective physical sense as intensity).
• Pitch is a subjective perception related to frequency (not a direct physical measurement like frequency itself).

Answer:

frequency and intensity