technician vs soundman

technician and soundman both are nouns.

Word	Noun	Adjective	Verb	Adverb
technician	Yes	No	No	No
soundman	Yes	No	No	No

As nouns, soundman is a hyponym of technician; that is, soundman is a word with a more specific, narrower meaning than technician:

technician: someone whose occupation involves training in a specific technical process
soundman: a technician in charge of amplifying sound or producing sound effects (as for a TV or radio broadcast)

Other hyponyms of technician include animator, dental technician, denturist, techie, tekki, webmaster.

technician (noun)	soundman (noun)
someone whose occupation involves training in a specific technical process	a technician in charge of amplifying sound or producing sound effects (as for a TV or radio broadcast)
someone known for high skill in some intellectual or artistic technique