Department of Architectural Engineering, Hanyang University, Seoul 133-791, South Korea.
J Acoust Soc Am. 2011 Jul;130(1):219-27. doi: 10.1121/1.3598455.
In the present study, the effects of interference from combined noises on speech transmission were investigated in a simulated open public space. Sound fields for dominant noises were predicted using a typical urban square model surrounded by buildings. Then road traffic noise and two types of construction noises, corresponding to stationary and impulsive noises, were selected as background noises. Listening tests were performed on a group of adults, and the quality of speech transmission was evaluated using listening difficulty as well as intelligibility scores. During the listening tests, two factors that affect speech transmission performance were considered: (1) temporal characteristics of construction noise (stationary or impulsive) and (2) the levels of the construction and road traffic noises. The results indicated that word intelligibility scores and listening difficulty ratings were affected by the temporal characteristics of construction noise due to fluctuations in the background noise level. It was also observed that listening difficulty is unable to describe the speech transmission in noisy open public spaces showing larger variation than did word intelligibility scores.
在本研究中，我们在模拟的开放式公共空间中研究了组合噪声对语音传输的干扰影响。使用建筑物环绕的典型城市广场模型来预测主要噪声的声场。然后，选择道路交通噪声和两种类型的建筑噪声（对应于稳态噪声和脉冲噪声）作为背景噪声。对一组成年人进行了听力测试，并使用听力困难和可理解性评分来评估语音传输质量。在听力测试过程中，考虑了两个影响语音传输性能的因素：（1）建筑噪声（稳态或脉冲）的时间特性，以及（2）建筑和道路交通噪声的水平。结果表明，由于背景噪声水平的波动，建筑噪声的时间特性会影响单词可理解性得分和听力困难评级。还观察到，听力困难无法描述嘈杂的开放式公共空间中的语音传输，其变化比单词可理解性得分更大。
