A trial implementation of a distance estimation method based on standing waves of audible sound

Abstract

AbstractIn many engineering fields, the distance to target is very important information. In a typical method, the distance is estimated by measuring the time delay between transmitted and reflected waves. However, it is difficult to estimate short distances with a method like this. In the field of microwave radar, a method using standing waves to measure short distances and multiple targets is known. We have applied this method to distance estimation using audible sound and have shown the validity of this method by our simulations and experiments. In this paper, we present a prototype system for distance estimation in which this method is implemented, and evaluate the performance of this system by experiments in an actual sound field. © 2011 Wiley Periodicals, Inc. Electr Eng Jpn, 177(2): 41–48, 2011; Published online in Wiley Online Library (wileyonlinelibrary.com). DOI 10.1002/eej.21160