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http://dx.doi.org/10.7840/KICS.2011.36C.2.119

A Study on Propagation Characteristics of Acoustic Signals in Indoor Environments  

Jeong, Sang-Hyo (건국대학교 전자정보통신공학부)
Lee, Eui-Hyoung (건국대학교 전자정보통신공학부)
Yoo, Seung-Soo (건국대학교 전자정보통신공학부)
Kim, Sun-Yong (건국대학교 전자정보통신공학부)
Publication Information
The Journal of Korean Institute of Communications and Information Sciences / v.36, no.2C, 2011 , pp. 119-125 More about this Journal
Abstract
Start This paper analyzes the propagation characteristics of acoustic signals in indoor environments, which is applicable to indoor positioning system. Indoor stereo sound system is generally valid within $25m^2$. So it is not possible to apply prevalent sound propagation characteristic to indoor positioning system because the prevalent acoustic signals propagation characteristic is defined under free space condition. Therefore, in this paper, we present the propagation characteristics of acoustic signals in indoor environments considering the free space propagation characteristic as well as room characteristic such as humidity, temperature, absorption of atmosphere and so on. To verify the designed propagation model of indoor acoustic signals, this paper presents the propagation characteristics of decreasing sinusoidal signals whose frequencies ate from 1kHz to 20kHz in anechoic room. In addition, this paper also presents the propagation characteristics of decreasing sinusoidal signals which have multiple frequencies.
Keywords
Acoustic signals; Attenuation constant; Propagation loss; Indoor Positioning; Pathloss;
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