machinery noise

基本解释

Engine exhaust noise is a main source for construction machinery noise, and it has a very significant impact on the level of construction machinery noise.
發動機排氣噪聲是工程機械整機噪聲中最主要的噪聲源，對於工程機械整機噪聲水平的高低有重要的影響。
Machinery noise control technology applications in the ship can not only improve the human work environment, but also improve the performance of ship stealth.
機械噪聲控制技術在艦船上的應用不但可以改善人機工作環境，而且還可以提高艦船隱身性能。
Then the pipe system becomes the main noise resource of quite submarine, when propeller noise, hydrodynamic noise and machinery noise of facility base are controlled effectively.
指出螺鏇槳噪聲、水動力噪聲和設備機座機械噪聲被有傚抑制後，琯道系統便成爲“安靜型”潛艇的主要噪聲源。

Almost everything stays at eye level or below, and there are conveyors in only one spot, meaning less machinery that might need attention (and less noise).
FORBES: Magazine Article