Which unit is used to measure distance in the acoustic variable context?

Which unit is used to measure distance in the acoustic variable context?

• A. seconds
• B. kg
• C. cm or mm
• D. Newtons

Answer: (C)

Distance is a measure of length, not time, mass, or force. In the acoustic variable context, we’re looking at how far particles in the medium move or how large a spatial feature is, which are lengths. Because those displacements are typically small, centimeters or millimeters are the common units used. Seconds would measure time, kilograms measure mass, and Newtons measure force, none of which describe distance. So the appropriate units are centimeters or millimeters.

Distance is a measure of length, not time, mass, or force. In the acoustic variable context, we’re looking at how far particles in the medium move or how large a spatial feature is, which are lengths. Because those displacements are typically small, centimeters or millimeters are the common units used. Seconds would measure time, kilograms measure mass, and Newtons measure force, none of which describe distance. So the appropriate units are centimeters or millimeters.