Research Institute of Electrical Communication Tohoku University


Yôiti Suzuki,Professor

Shuichi Sakamoto,Associate Professor

Zhenglie Cui,Assistant Professor

Jorge Alberto Treviño López,Assistant Professor

César Daniel Salvador Castañeda,Specially Appointed Assistant Professor

Fumitaka Saito,Research Fellow

Jorge Alberto Treviño López, Yôiti Suzuki,
Cesar Daniel Salvador Castaneda, Zhenglie Cui


Research Activities

We aim to develop advanced and comfortable acoustic communication systems exploiting digital signal processing techniques. To realize this, we are keenly studying the information processing that takes place in the human auditory system. Moreover, we also investigate the mechanisms for multimodal information processing, including hearing. We mainly apply a psycho-acoustical approach to study human auditory and multimodal perception. In this sense, our research is characterized by its high interdisciplinary nature which covers acoustics, information science, communications engineering, electronics, audiology and psychology.

Laboratory Web Page

ECEI Web Page

Advanced Acoustic Information Systems (Prof. Suzuki)

Basic studies are keenly conducted to gain a deeper understanding of the perceptual process of hearing. In particular, three-dimensional (3D) spatial hearing is studied under the notion of “active hearing.” This notion treats 3D spatial hearing which considers listener’s movement during hearing. With this knowledge as a basis, we aim towards the realization of a ‘comfortable’ 3D sound environment. A notable application of this research is the development of 3D auditory displays. These systems are a critical requirement for the realization of universal multimedia communications.

Research topics

  • Spatial hearing process as a multimodal perception
  • System theory and development of 3D highdefinition auditory displays based on the notion of “active listening”
  • Development of new theories of acoustic digital signal processing.
  • High level cognition process of the sense of presence and verisimilitude

Auditory and Multisensory Information Systems (Assoc. Prof. Sakamoto)

We study the mechanism of human multimodal processing, including hearing. In particular, we focus on speech perception as an audio-visual process, the judgment of auditory space during motion and the impression of a sense-of-reality in multimodal content. Such knowledge is crucial to develop advanced communication and information systems. Based on this knowledge, we are developing future auditory information systems.

Research topics

    • Mechanism of multisensory information processing including hearing
    • Development of high-definition 3D sound space acquisition systems
    • Auditory information systems based on multisensory information processing

Accurate sound space communications system based on higher order Ambisonics by using 157ch loudspeaker array
Head-related transfer functions as a function of elevetion. Poles and zeros change systematically with the rise of elevetion.