  Social Robot Lumen is a humanoid robot created to act like human and be human
friend. In this study, Lumen scenario is limited on Lumen as an exhibition
guide in Electrical Engineering Days 2015, a seminar and exhibition of
electrical engineering undergraduate and graduate student of Bandung Institute
of Technology. To be an exhibition guide, Lumen is equipped by Nao robot, a
server, and processing applications. Audio communication system is one of the
processing applications. The purpose of the system is to create verbal
communication that allow Lumen to receive human voice and respond naturally to
it. To be able to communicate like a human, audio communication system is built
with speech recognition module to transform speech data into text, speech
synthesizer module to transform text data into speech, and gender
identification module to distinguish adult female and male voice. Speech
recognition module is implemented using Google Speech Recognition API, speech
synthesizer module is implemented using Acapela engine, and gender
identification module implemented by utilizing speech signal feature that is
extracted using Fast Fourier Transform algorithm. Hardware used for
implementation are Nao robot, computer, and wireless modem.
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  Lumen Robot Sosial Robot merupakan robot humanoid yang diciptakan agar dapat
bersikap seperti manusia dan menjadi teman bagi manusia. Sistem komunikasi
audio merupakan salah satu aplikasi pengolah yang bertujuan agar Lumen dapat
menerima suara manusia dan meresponnya dengan natural, yaitu seperti cara
manusia merespon manusia lainnya. Untuk dapat berkomunikasi seperti manusia,
sistem komunikasi audio dilengkapi dengan tiga buah modul: speech recognition
untuk mengubah data suara menjadi teks, speech synthesizer untuk mengubah data
teks menjadi suara, dan gender identification untuk membedakan suara wanita dan
pria.
