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Gross investment equals
Tone Sensitivity
The ability to distinguish different frequencies of sound or musical notes.
Absolute Threshold
The minimum intensity of a stimulus that one can detect 50% of the time.
Difference Threshold
The minimum difference between two stimuli required for detection 50 percent of the time. We experience the difference threshold as a just noticeable difference (or jnd).
Guitar
A stringed musical instrument with a long fretted neck, a flat wooden soundboard, and typically six strings, which are plucked or strummed.
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