Space domain complex envelopes: definition and a spatial modulation method.
When one visualizes a sound field as a means of treating noise sources, a detailed variation of the sound field is not required. It is sufficient to see source locations and overall variation of the field. A complex envelope in space can provide adequate information that one wishes to get because an envelope shows a gross change in signal. In other words, to interpret overall variation of sound fields in terms of a complex envelope is attempted. To achieve this objective, spatial complex envelopes have been defined firstly, and then a spatial modulation method to obtain the envelope has been theoretically developed and verified.
Park
Choon-Su
CS
Department of Mechanical Engineering, Center for Noise and Vibration Control, Korea Advanced Institute of Science and Technology, Science Town, Daejeon, Korea. cpure77@kaist.ac.kr
Kim
Yang-Hann
YH