Meaning of sounding machine | Babel Free

Examples

“My fist went out like an arrow from a released bow, and Tom Spink staggered back, tripped against the corner of the tarpaulin-covered sounding-machine, and sprawled on the deck. He tried to make a fight of it, but I followed him up, giving him no chance to set himself or recover from the surprise of my first onslaught.”

CEFR level