| 期刊全稱 | Angular Distribution Analysis in Acoustics | | 影響因子2023 | S. M. Baxter,C. L. Morfey | | 視頻video | http://file.papertrans.cn/158/157521/157521.mp4 | | 學(xué)科分類 | Lecture Notes in Engineering | | 圖書(shū)封面 |  | | 影響因子 | The purpose of this book is to j.ir€‘~ 0l‘l‘ a new technique for the experimental investigation of the free wave model sound field of acoustics. The technique is based on the use of spherical harmonic functions of angle. Acousticians frequently encounter random sound fields whose properties may be closely modelled by use of the "free wave" field. This model field is defined by two basic statistical properties: stationarity in time, and homogeneity in space. Stationarity means that any single order statistic measured by a microphone in the field will be independent of the time at which the recording is taken, while homogeneity means that the measurement will also be independent of the mic- phone‘s position in the field. Furthermore, second order statistics obtained from the measurements of two microphones will depend only on the time lapse between the two recordings, and the relative spatial separation of the micro- phones, and not on the microphones‘ absolute positions in space and time. The free wave field may also (equivalently) be pictured as a collection of plane sound waves which approach an observation position from all angles. These are the "free waves" of the title, with no | | Pindex | Book 1986 |
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