Jane's threshold for a 2000 Hz pure tone is 40 dB SPL.What is the sensation level for a 2000 Hz presented to Jane at 50 dB SPL?

Question

Quizplus · Accepted Answer

Sensation level (SL) is the difference between the presentation level of a sound and an individual's threshold for the same sound. 
In this case, the presentation level of the 2000 Hz tone is 50 dB SPL, and Jane's threshold for the same tone is 40 dB SPL. Therefore, the SL is:
SL = presentation level - threshold level
= 50 dB SPL - 40 dB SPL
= 10 dB SL 
So, the answer is (D) 10 dB SL.

Jane's Threshold for a 2000 Hz Pure Tone Is 40