Die Erfindung betrifft die Verwendung bestimmter Verbindungen zum Maskieren oder Vermindern des bzw. eines oder mehrerer unangenehmer Geruchseindrücke eines oder mehrerer unangenehm riechender Stoffe und/oder zum Verstärken des bzw. eines oder mehrerer angenehmer Geruchseindrücke eines oder mehrerer angenehm riechender Stoffe sowie neue Riechstoffmischungen und parfümierte Produkte enthaltend solche Verbindungen.Use of a single cyclic ketone compound (I) or a mixture comprising two or more cyclic ketone compound (I), for masking or decreasing one or more unpleasant olfactory impression of one or more unpleasant smelling substances, and for enhancing one or more pleasant olfactory impression of one or more pleasant smelling substances, where the substance is not (I), is claimed. Use of a single cyclic ketone compound of formula (I) or a mixture comprising two or more cyclic ketone compound compounds of formula (I), for masking or decreasing one or more unpleasant olfactory impression of one or more unpleasant smelling substances, and for enhancing one or more pleasant olfactory impression of one or more pleasant smelling substances, where the substance is not (I), is claimed. X : -O-, -CH 2- or -O-CH 2-, where two or less of the four baby bonds denotes a double bond and the remaining baby bonds denote a single bond. Independent claims are included for: (1) a fragrance mixture, preferably perfume oil, comprising (A) (I), and (B) one, two, three, four, five, six or more (further) odoriferous substances, where the other fragrance is not (I), and has a molar mass of 150-285 g/mole； (2) a perfumed product comprising the fragrance mixture, where a proportion of the fragrance mixture in relation to the total mass of the product is 0.01-10 wt.%, preferably 0.25-3 wt.%； and (3) producing the perfumed product, comprising (i) providing the components (A) and (B), preferably providing the fragrance mixture, (ii) providing one or more further components of the manufactured perfum
