Research Area
Year Published

109 Results

May 27, 2018

Space domain-based selection of direct-sound bins in the context of improved robustness to reverberation in direction of arrival estimation

Euronoise 2018

Acoustic reverberation has a detrimental effect on many of the currently used microphone array processing methods. In particular, the performance of most direction of arrival estimation approaches is significantly degraded in the presence of coherent reflections. One general approach to improving the robustness to reverberation is to operate in the short-time Fourier transform domain and select the bins dominated by the direct sound, while rejecting those contaminated by reflections.

By: Vladimir Tourbabin, David Lou Alon, Ravish Mehra
Areas: AR/VR

April 21, 2018

Speech Communication through the Skin: Design of Learning Protocols and Initial Findings

Computer Human Interaction (CHI)

This study reports the design and testing of learning protocols with a system that translates English phonemes to haptic stimulation patterns (haptic symbols).

By: Jaehong Jung, Yang Jiao, Frederico M. Severgnini, Hong Z Tan, Charlotte M. Reed, Ali Israr, Frances Lau, Freddy Abnousi

April 21, 2018

Feeling Speech on the Arm

Computer Human Interaction (CHI)

In this paper, we introduce a transcutaneous language communication (TLC) system that transmits a tactile representation of spoken or written language to the arm.

By: Jennifer Chen, Pablo Castillo, Robert Turcott, Ali Israr, Frances Lau

April 21, 2018

Towards Pleasant Touch: Vibrotactile Grids for Social Touch Interactions

Computer Human Interaction (CHI)

In this paper, we realize a wearable tactile device that delivers smooth pleasant strokes, those resemble of caressing and calming sensations, on the forearm.

By: Ali Israr, Freddy Abnousi

April 21, 2018

Communication Behavior in Embodied Virtual Reality

Human Computer Interaction Conference (CHI)

To investigate communication behavior with embodied virtual reality onto an avatar in a virtual 3D environment, we had 30 dyads complete two tasks using a shared visual workspace: negotiating an apartment layout and placing model furniture on an apartment floor plan.

By: Harrison Jesse Smith, Michael Neff

April 17, 2018

Evaluation of near field distance perception in virtual environments

175th Meeting of the Acoustical Society of America

Binaural synthesis of spatial audio for virtual and augmented environments is typically performed by convolving an anechoic signal with impulse responses measured at the listener’s ears using a source at a fixed distance. This method is accurate for sounds presented at the measured impulse response’s distance, and for more distant sources, decreasing intensity provides a reasonable approximation. However, sources nearer than 1 m provide additional distance cues.

By: Philip Robinson
Areas: AR/VR

April 16, 2018

Sparse Head-Related Transfer Function Representation with Spatial Aliasing Cancellation

International Conference on Acoustics, Speech and Signal Processing

In this paper, a new technique to reconstruct high resolution individual HRTFs from sparse measurements is presented. This is achieved by minimizing the spatial aliasing error in the spherical harmonics (SH) representation of the HRTFs, and by incorporating statistics calculated from a set of reference HRTFs, leading to an optimal minimum mean-square error solution.

By: David Lou Alon, Zamir Ben-Hur, Boaz Rafaely, Ravish Mehra
Areas: AR/VR

March 25, 2018

Design and Analysis of a High-Performance Impedance-Based Hybrid Haptic Interface

Haptics Symposium

This paper describes the design of a novel, high-performance one degree-of-freedom hybrid haptic interface. The interface integrates a particle brake, a Series Elastic Actuator (SEA), and a small DC motor into a single actuator. Unlike existing hybrid designs, the one presented here does not suffer from a significant mismatch between passive and active torque capability.

By: Patrick Dills, Chembian Parthiban, It Fufuengsin, Nick Colonnese, Michael Zinn
Areas: AR/VR

March 25, 2018

A Social Haptic Device to Create Continuous Lateral Motion Using Sequential Normal Indentation

IEEE Haptics Symposium (HAPTICS)

This paper presents a device for creating a continuous lateral motion on the arm to mimic a subset of the gestures used in social touch.

By: Heather Culbertson, Cara M. Nunez, Ali Israr, Frances Lau, Freddy Abnousi, Allison M. Okamura

March 25, 2018

Toward Improved Surgical Training: Delivering Smoothness Feedback using Haptic Cues

IEEE Haptics Symposium (HAPTICS)

In this paper, we explore the effectiveness of providing real-time feedback of movement smoothness, a characteristic associated with skilled and coordinated movement, via a vibrotactile cue. Subjects performed a mirror-tracing task that requires coordination and dexterity similar in nature to that required in endovascular surgery.

By: William H. Jantscher, Shivam Pandey, Priyanshu Agarwal, Sadie H. Richardson, Bowie R. Lin, Michael D. Byrne, Marcia K. O’Malley