噪声与振动控制Issue(z1)：246-248,3.DOI:10.3969/j.issn.1006-1335.2013.S1.057
鸣笛声定位中的时延估计技术
Method on Time Delay Estimation of Car Honk Localization
伍思霞 1蒋洪涛 2翟国庆1
作者信息
- 1. 浙江大学 环境污染控制技术研究所，杭州 310058
- 2. 上虞专用风机有限公司，浙江 上虞 312300
- 折叠
摘要
Abstract
Effective method on sound source localization is needed to automatically monitor and recognize the vehicle with illegal honk. The accuracy of time delay estimation is of great importance in sound source localization. Some car horn sounds were sampled by a dual channel instrument. Four methods on time delay estimating, i.e., the difference between times corresponding to two relevant feature points, the cross-correlation method, the direct reading method and the method of moving A-weighted sound pressure level curve, were tested comparatively. Results show that the direct reading method works best, while the cross-correlation method comes second. For different positions of car horn sounds, when the car was far away from the reference microphone in the direction of the connecting line between two microphones, the accuracy of estimating time delay declined among three methods excluding the cross-correlation method. For the cross-correlation method, the duration of a car horn sound has no influence on the difference of sound propagation distances between any one of two microphones and the sound source when the sampled sound contains a whole honking event.关键词
声学/鸣笛声/声源定位/传声器阵列/时延估计/互相关Key words
acoustics/car horn sound/sound localization/microphone array/time delay estimation/cross-correlation分类
通用工业技术引用本文复制引用
伍思霞,蒋洪涛,翟国庆..鸣笛声定位中的时延估计技术[J].噪声与振动控制,2013,(z1):246-248,3.
