Uncovered sound systems get on people's nerves (5)

I believe the answer is:

annoy

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'get on people's nerves' is the definition.
'annoy' can be an answer for 'get' (thesaurus). I am not sure about the 'on people's nerves' bit.

I cannot understand how the remainder of the clue works.

Can you help me to learn more?

(Other definitions for annoy that I've seen before include "get angry" , "Vex" , "Bother, irritate" , "Irk" , "Irritate - pester" .)

I've seen this clue in The Telegraph.

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