Portable smart speakers with wireless connections have in recent years become more popular. These speakers are often moved to new locations and placed in different positions in different rooms, which affects the sound a listener is hearing from the speaker. These speakers usually have microphones on them, typically used for voice recording. This thesis aims to provide a way to compensate for the speaker position’s effect on the sound (so called room correction) using the microphones on the speaker and the speaker itself. Firstly, the room frequency response is estimated for several different speaker positions in a room. The room frequency response is the frequency response between the speaker and the listener. From these estimates, the relationship between the speaker’s position and the room frequency response is modeled. Secondly,an algorithm that estimates the speaker’s position is developed. The algorithm estimates the position by detecting reflections from nearby walls using the microphones on the speaker. The acquired position estimates are used as input for the room frequency response model, which makes it possible to automatically apply room correction when placing the speaker in new positions. The room correction is shown to correct the room frequency response so that the bass has the same power as the mid- and high frequency sounds from the speaker, which is according to the research aim. Also, the room correction is shown to make the room frequency response vary less with respect to the speaker’s position.

University of Macau / Faculty of Arts and Humanities. / Department of English

寇志晖 / Thesis (Ed.D.)--Chinese University of Hong Kong, 2011. / Includes bibliographical references (leaves 322-331) / Electronic reproduction. Hong Kong : Chinese University of Hong Kong, [2012] System requirements: Adobe Acrobat Reader. Available via World Wide Web. / Abstracts in Chinese and English. / Kou Zhihui.

by Huang Xiao-hua. / Thesis (M.Ph.)--Chinese University of Hong Kong, 1984 / Bibliography: leaves 152-157

by Yu Fei. / Bibliography: leaves 161-164 / Thesis (M.Ph.)--Chinese University of Hong Kong, 1986

by Hou Qi'an. / Includes bibliographical references / Thesis (M.Ph.)--Chinese University of Hong Kong, 1986

by Chen Jianping. / Thesis (M.Ph.)--Chinese University of Hong Kong, 1986 / Bibliography: leaves 130-140.

by Guo Sujuan. / Bibliography: leaves 145-151 / Thesis (M.Ph.)--Chinese University of Hong Kong, 1986

by Guo Dan-qing. / Includes bibliographical references / Thesis (M.Ph.)--Chinese University of Hong Kong, 1986

by Yeung See-shing. / Thesis (M.A.Ed.)--Chinese University of Hong Kong, 1989. / Bibliography: leaves 149-171.