As an important part of the sensory soundscape of urban parks,birdsong plays a key role in reducing the stress of urban residents.The purpose of this study is to explore the influence of the duration of birdsong on traffic noise an-noyance in urban parks and the relationship between the traffic annoyance and the birdsong.Taking three urban parks in Van-couver of Canada as an example,questionnaire investigation and acoustic measurement were conducted at 41 observation points.Let the participants listen to traffic noise and birdsong in sequence,then the variation of the traffic annoyance were compared and analyzed.Result show that there is a strong correlation among the sound frequency of 1 to 4 kHz,the traffic annoyance and the duration of birdsong soundscape.Birdsong can reduce traffic annoyance when the duration of birdsong is between 20 seconds and 120 seconds.When the duration of birdsong reaches 60 seconds and 80 seconds,the effect of the an-noyance reduction is optimal,and the decline rates of traffic annoyance can reach 26.67%and 22.22%respectively.Howev-er,when the duration of birdsong exceeds 120 seconds,the effect of annoyance reduction will decrease.In practical applica-tions,more berry plants can be applied to attract songbirds.In addition,birdsong players can be used to adjust the duration and frequency of the birdsong,so as to reduce the traffic annoyance in urban parks.
维普
万方数据