Jordie went to have his hearing tested.Some of the sounds that were presented during the test were so faint that he was unable to detect them.These faint sounds would fall below Jordie's:

Question

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The absolute threshold for sound is the minimum level of sound necessary for a person to detect a particular sound 50% of the time. Faint sounds that Jordie was unable to detect would fall below his absolute threshold for sound. The difference threshold for sound is the smallest amount by which two sounds can differ in order for them to be perceived as different, and the adaptation threshold for sound is the point at which a sound becomes so familiar that it is no longer perceived as distinct. The level for perceptual invariance refers to the threshold where a sound remains consistent in its perceived characteristics despite changes in the physical characteristics of the sound.

Jordie Went to Have His Hearing Tested