2011 Fiscal Year Final Research Report

A research on acoustic information transmission to local spot using audible sound

Research Project

Project/Area Number	21656097
Research Category	Grant-in-Aid for Challenging Exploratory Research
Allocation Type	Single-year Grants
Research Field	Communication/Network engineering
Research Institution	Akita Prefectural University
Principal Investigator	TAKANE Shouichi 秋田県立大学, システム科学技術学部, 准教授 (90236240)
Project Period (FY)	2009 – 2011
Keywords	信号処理
Research Abstract	Methods to transmit information in sound to a specific local spot with ordinary audio equipments via audible sounds were discussed in this research. It was found out as the results that the reproduction of speech signal at the spot and the delivery of distorted sound at the point except the spot are possible with decomposition of original signal into random vectors and output of the decomposed signals from sound sources located in various directions and distances. However, there remained the unresolved matter that the information involved in the original signal is almost always audible from the synthesized sound at the point except the spot.