ENVIRONMENT #671821 IATE #47861 laghdú ar thorann Tagairt an Ghníomhaireacht Eorpach Comhshaoil (GEC) ga noise reductionen Sainmhíniú 1.The reduction in the sound pressure level of a noise, or the attenuation of unwanted sound by any means. Tagairt 1.CONFER; amortissement du son | atténuation de bruit | réduction du bruitfr