direct\ onomatopoeia

звукоподражание

the use of words whose sounds imitate those of the signified object of action (V.A.K.)

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a combination of speech-sounds which aims at imitating sounds produced in nature (wind, sea, thunder, etc.), by things (machines or tools, etc.) by people (sighing, laughter, patter of feet, etc.) and by animals (I.R.G.)

hiss, powwow, murmur, bump, grumble, sizzle, ding-dong, buzz, bang, cuckoo, tintinnabulation, mew, ping-pong, roar

Then with enormous, shattering rumble, sludge-puff, sludge-puff, the train came into the station. (A.Saxton)

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использование слов, фонетический состав которых напоминает называемые в этих словах предметы и явления - звуки природы, крики животных, движения, сопровождающиеся каким-нибудь шумом, речь и различные звуки, которыми люди выражают своё настроение, волю и т.д. (I.V.A.)

bubble, splash, rustle, purr, flop, babble, giggle, whistle

... where white horses and black horses and brown horses and white and black horses and brown and white horses trotted tap-tap-tap tap-tap-tappety-tap over cobble stones ...(Ш.О'Кейси)

See: indirect onomatopoeia, phono-graphical level, morphological level