Noel Wants to Measure Her Cat's Auditory Threshold

Multiple Choice

Noel wants to measure her cat's auditory threshold.She quietly whispers Ernie's name and slowly increases her volume until the cat turns and looks at her.Over the course of several days,she whispers ten times at each volume.The volume at which Ernie responds five times is called:

A) the absolute threshold.
B) the just noticeable difference.
C) Weber's law.
D) the relative threshold.