Previous research indicates that nature and nature representations might have positive moderator-effects and noise negative effects on performance, perceived life quality, physical and mental health. In this intervention, we observed if posters showing forests can also be used reduce actual and perceived noise as well as state anxiety in the users of the Bernard King Library Dundee. Measurements were taken twice a day for a 5-day period pre-intervention and again during the intervention, after the posters were installed. No significant difference was found between perceived or actual noise levels as well as state anxiety before and during intervention. Actual and perceived noise were positively correlated over both of the study’s phases, but only significant for the intervention phase when observing the phases separately. Finally, actual and perceived noise levels could not explain the overall variance of state anxiety or the variance of state anxiety by phase. The absence of an effect of nature representations on state anxiety, as well as actual and perceived noise is discussed.