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Urban forests have aesthetic functions and social functions that refer to the quality standards. In the urban landscape, space is inseparable from the problem of traffic noise and other activities. The sounds are composed in unity, and form interactions in the acoustic environment of urban forests. A sound composition that interacts with a particular landscape is called a soundscape. The term soundscape can also be interpreted as an acoustic environment that is understood and felt by individuals. Urban noise can cause city forest soundscapes to be less comfortable and less aesthetic, so their function as green open spaces is not fulfilled. This study aims to make improvements to the soundscape based on the quality of green open space standards through noise control and find out the improvement formula that is most preferred by the subjects. The standard quality of green open space can be pursued through sound masking, active noise cancellation and convolution in sound signal conditioning. The improvement results were tested on 30 respondents by comparison tests and then identified with subjective environmental acoustic parameters, namely autocorrelation function (τ1, Φ1) and dynamic range (DR). Efforts to improve quality based on the quality of green open space the most preferred by respondents are sound masking and ANC with birds singing with scores of 4.44 and 2.78, respectively. Based on the results of identification of traffic noise treated by ANC and sound masking with birds chirping obtained DR values = 32.35 dBA, τ1 = 0.73 s, and Φ1 = 0.03.