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ruído de fundo
commun.	Eigenrauschen n
earth.sc.	Eigengeräusch n; Grundgeräusch n; Grundrauschen n
earth.sc., el.	Echogras n; Gras n
el.	Hintergrundrauschen n; Rauschen n; Zischen n
environ.	Hintergrundgeräusch n

ruído de fundo: 14 phrases in 6 subjects

Communications	6
Earth sciences	1
Electronics	4
Environment	1
Health care	1
Natural sciences	1