Mute roadie, wandering round - one’s assessing what can be heard (10)

I believe the answer is:

audiometer

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'one's assessing what can be heard' is the definition.
I can't judge whether this definition defines the answer.

'mute roadie wandering' is the wordplay.
'wandering' indicates anagramming the letters.
'mute'+'roadie'='muteroadie'
'muteroadie' with letters rearranged gives 'AUDIOMETER'.

'round' is the link.

Can you help me to learn more?

I've seen this clue in The Independent.

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