Research Projects

  • 3D Audio Headphones

    Developing a natural sound rendering headphone system with strategic-positioned emitters and advanced 3D audio signal processing techniques. Achieving personalized 3D audio automatically without any measurements or training. Producing important sound cues to recreate a realistic perception of directional sound sources immersed with surround ambience.

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    Natural Sound Rendering for Headphones

    With the strong growth of assistive and per- sonal listening devices, natural sound ren- dering over headphones is becoming a necessity for prolonged listening in multime-dia and virtual reality applications. The aim of natural sound rendering is to naturally recreate the sound scenes with the spatial and timbral quality as natural as possible, so as to achieve a truly immersive listening experience. However, rendering natural sound over headphones encounters many challenges. This tutorial article presents signal processing techniques to tackle these challenges to assist human listening.

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    Personal Assistive Listening System

    Personal Assistive Listening System is developed using a unique and novel combination of parametric loudspeaker and conventional electro-dynamic loudspeakers developed by the NTU team. By using the combined sound projection of the parametric and conventional loudspeakers, higher sound clarity at predefined frequencies (especially in speech recognition) can be heard by hearing impaired listeners. Personalized Assistive Listening System allows normal hearing listeners and hearing-impaired listeners watching TV together without compromising everyone’s listening experiences.

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    Environmental Noise Source Detection

    Developing an automated traffic noise monitoring and surveillance system to aid government authorities in efficiently enforcing against illegally modified vehicles that produce excess noise on roads.

    Summary

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    Abating Urban Noise Through a Holistic approach of noise monitoring, analytic and control (MAC)

    The main research objective of this project is to combine different enabling technologies developed by ADSC, I2R, and NTU to continuously monitor, analyze, and perform active noise control on aircraft, rail, and road traffic noises affecting the liveable residential environment. With rapid urban development, the annoyance and dissatisfaction caused by excessive urban noise is familiar to almost all Singaporeans; the negative health impact is less well known but is nonetheless very significant.