Using a procedure similar to that used to establish "equal loudness contours" as a guide and using one of the same "standard" stimuli that is used to measure loudness (example 1000 hz tone at 40 db spl)

describe a procedure for determining the "annoyance" of tones of other frequencies and levels.

are their multiple choices ?

explanation:

dopamine..

"it was found that some people who were taking the drug l-dopa to raise their levels of dopamine were developing schizophrenic-like symptoms supporting research a strength of the dopamine hypothesis is that there are many studies which have shown support for the neurochemical explanation."