The AHI : an audio and haptic interface for simulating contact interactions
department or school: Science, Faculty of
department or school: Computer Science, Department of
data provider: DSpace
degree campus: UBCV
creator: DiFilippo, Derek
issued: 2009-07-10T00:00:00
issued: 2000
related degree: Master of Science - MSc
degree grantor: University of British Columbia
description: A contact interaction occurs when two rigid objects strike, scrape, or slide against one another. Auditory and haptic (touch) feedback from contact interactions can provide useful information to an individual about their world. We have implemented a prototype human-computer interface that renders synchronized auditory and haptic contact interactions with very low (1ms) latency. This audio and haptic interface (AHI) includes a Pantograph haptic device that reads position input from a user and renders force output based on this input. We synthesize audio in real-time by convolving the force profile generated by user interaction with the measured audio impulse response of the real-world version of the virtual surface. The resulting auditory and haptic stimuli are tightly coupled because we produce both using the same force profile. Also, because we use a dedicated DSP for haptic control and audio synthesis we are able to achieve negligible system latency. The AHI is the only human-computer interface that we know of for providing closely coupled auditory and haptic stimuli with guaranteed low latency. Our work with the AHI draws on research results from a variety of fields: in haptics, audio synthesis, robotic measurement, and psychophysics. We have conducted a pilot user study with the AHI to verify that the system latency lies below the perceptual threshold for detecting synchronization between auditory and haptic contact events. We have also presented our work as a live demonstration at an international conference and have taken some preliminary steps toward integrating the AHI with a rigid body dynamic simulation. These three separate evaluations suggest that the AHI device and algorithms could prove valuable for further perceptual studies and for synthesizing continuous contact interactions in more general virtual environments with commercial haptic devices.
aggregated CHO: https://circle.library.ubc.ca/rest/handle/2429/10588
extent: 10193385 bytes
format: application/pdf
note: The AHI: An Audio and Haptic Interface For Simulating Contact Interactions by Derek DiFilippo B.Sc Mathematics and Computer Science, McMaster University, 1998 A THESIS S U B M I T T E D IN P A R T I A L F U L F I L L M E N T O F T H E R E Q U I R E M E N T S F O R T H E D E G R E E O F Master of Science in T H E F A C U L T Y O F G R A D U A T E STUDIES (Department of Computer Science) We accept this thesis as conforming to the required standard The University of British Columbia August 2000 © Derek DiFilippo, 2000 In presenting this thesis in partial fulfilment of the requirements for an advanced degree at the University of British Columbia, I agree that the Library shall make it freely available for reference and study. I further agree that permission for extensive copying of this thesis for scholarly purposes may be granted by the head of my department or by his or her representatives. It is understood that copying or publication of this thesis for financial gain shall not be allowed without my written permission. Department of C ^ t ^ j ^ ^ C g The University of British Columbia Vancouver, Canada Date DE-6 (2/88) Abstract A contact interaction occurs when two rigid objects strike, scrape, or slide against one another. Auditory and haptic (touch) feedback from contact interactions can provide useful information to an individual about their world. We have imple-mented a prototype human-computer interface that renders synchronized auditory and haptic contact interactions with very low (1ms) latency. This audio and haptic interface (AHI) includes a Pantograph haptic device that reads position input from a user and renders force output based on this input. We synthesize audio in real-time by convolving the force profile generated by user interaction with the measured audio impulse response of the real-world version of the virtual surface. The resulting auditory and haptic stimuli are tightly coupled because we produce both using the same force profile. Also, because …
has type: Thesis/Dissertation
date issued: 2008-11
is shown at: 10.14288/1.0051285
language: eng
degree discipline: Computer Science
provider: Vancouver : University of British Columbia Library
publisher: University of British Columbia
rights: For non-commercial purposes only, such as research, private study and education. Additional conditions apply, see Terms of Use https://open.library.ubc.ca/terms_of_use.
scholar level: Graduate
type: Text
identifier URI: http://hdl.handle.net/2429/10588