Measurement of acoustic intensity in reverberant sound fields
نویسندگان
چکیده
منابع مشابه
The coherence of reverberant sound fields.
A new method of measuring spatial correlation functions in reverberant sound fields is presented. It is shown that coherence functions determined with appropriate spectral resolution contain the same information as the corresponding correlation functions, and that measuring such coherence functions is a far more efficient way of obtaining this information. The technique is then used to verify t...
متن کاملEfficient Evaluation of Reverberant Sound Fields
An image method due to Allen and Berkley (1979) is often used to simulate the effect of reverberation in rooms. This method is relatively expensive computationally. We present a fast method for conducting such simulations using multipole expansions. For M real and image sources and N evaluation points, while the image method requiresO(MN) operations, our method achieves the calculations in O(M ...
متن کاملOn the angular error of intensity vector based direction of arrival estimation in reverberant sound fields.
An acoustic vector sensor provides measurements of both the pressure and particle velocity of a sound field in which it is placed. These measurements are vectorial in nature and can be used for the purpose of source localization. A straightforward approach towards determining the direction of arrival (DOA) utilizes the acoustic intensity vector, which is the product of pressure and particle vel...
متن کاملMeasurement of complex acoustic intensity in an acoustic waveguide.
Acoustic intensity is normally treated as a real quantity, but in recent years, many articles have appeared in which intensity is treated as a complex quantity where the real (active) part is related to local mean energy flow and the imaginary (reactive) part to local oscillatory transport of energy. This offers the potential to recover additional information about a sound field and then to rel...
متن کاملAcoustic intensity measurement of the sound field radiated by a concert harp
An experimental study of the acoustic radiation of a concert harp is presented. Using a stationary mechanical excitation placed at one string location, the acoustic radiation of the complete instrument is investigated. Two main acoustic radiation sources are identified: the soundboard and the soundbox holes. Acoustic intensity vectors are measured in two planes located in the near field of thes...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: The Journal of the Acoustical Society of America
سال: 1983
ISSN: 0001-4966
DOI: 10.1121/1.2020338