@inproceedings{61d082af60d4485ab78ce46d9e549946,
title = "Acoustic Yagi-Uda antenna using resonance tubes",
abstract = "A Yagi-Uda antenna gets high directivity by applying current phase shift between elements due to resonance phenomena. It has some directors and reflectors, which are elements without electric supply. The length of directors is shorter than half-wave and that of reflectors is longer than half-wave. We proposed an acoustic Yagi-Uda antenna which elements are resonance tubes and a loudspeaker. The aim of this research is to im- prove directivity in a specific frequency. This can be applied to Radio Acoustic Sounding System (RASS), which is a kind of radar for weather observation, or to a parametric loudspeaker. The phase shift of sound waves was observed in the condition with a resonance tube and without the tube at the same position. That shift changes suddenly around the resonance frequency of the tube. Our acoustic antenna has resonance tubes that have different length as directors and reflectors to apply this phenomenon. Moreover, the distances be- Tween a loudspeaker and tubes were concerned by some experiments and by numerical analysis. The acoustic antenna showed directivity in an appropriate condition of the distances and the frequency of the sound source. It will be also added the consideration about the effective frequency band of this acoustic antenna.",
keywords = "Director, Parametric loudspeaker, Phase shift, RASS, Reflector, Resonance phenomena",
author = "Yuki Tamura and Kohei Yatabe and Yasuhiro Ouchi and Yasuhiro Oikawa and Yoshio Yamasaki",
year = "2014",
month = jan,
day = "1",
language = "English",
series = "INTERNOISE 2014 - 43rd International Congress on Noise Control Engineering: Improving the World Through Noise Control",
publisher = "Australian Acoustical Society",
editor = "John Davy and Marion Burgess and Charles Don and Liz Dowsett and Terry McMinn and Norm Broner",
booktitle = "INTERNOISE 2014 - 43rd International Congress on Noise Control Engineering",
note = "43rd International Congress on Noise Control Engineering: Improving the World Through Noise Control, INTERNOISE 2014 ; Conference date: 16-11-2014 Through 19-11-2014",
}