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Input device for disabled persons using expiration and tooth-touch sound signals

Published: 22 March 2010 Publication History

Abstract

This paper presents the realization of an input device for disabled persons, a hands-free man-machine interface using expiration and tooth-touch sound signals. In our research, the expiration signal was detected by a piezo film sensor array and the tooth-touch sound signal by a bone-conduction microphone. The piezo film sensor had two useful effects, piezoelectric and pyroelectric. Utilizing both these effects, we could detect vibration and temperature variation simultaneously. Thus, the duration and strength of expiration could be detected more accurately, minimizing the effect of interference from outside disturbance. The sensors also had added benefits, including being very light weight, small in size and of low-price. The device enabled disabled persons to dramatically extend the number of control channels hands-free by changing the strength and duration of expiration, in conjunction with the tooth-touch sound signal. We developed a novel method for separating the pyroelectric and piezoelectric signals from the original signal. We then designed the device using Hardware Description Language (VHDL) and applied it in a Field Programmable Gate Array (FPGA) chip. We tested our device in a Head Mounted Display (HMD) controller. Finally, we evaluated its performance using the following categories: input error rate, usability and input efficiency compared with a tooth-touch sound alone based input device.

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cover image ACM Conferences
SAC '10: Proceedings of the 2010 ACM Symposium on Applied Computing
March 2010
2712 pages
ISBN:9781605586397
DOI:10.1145/1774088
Permission to make digital or hard copies of all or part of this work for personal or classroom use is granted without fee provided that copies are not made or distributed for profit or commercial advantage and that copies bear this notice and the full citation on the first page. Copyrights for components of this work owned by others than ACM must be honored. Abstracting with credit is permitted. To copy otherwise, or republish, to post on servers or to redistribute to lists, requires prior specific permission and/or a fee. Request permissions from [email protected]

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Publication History

Published: 22 March 2010

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Author Tags

  1. FPGA
  2. disabled person
  3. expiration
  4. hands-free man-machine interface
  5. piezo film sensor
  6. tooth-touch sound

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SAC'10: The 2010 ACM Symposium on Applied Computing
March 22 - 26, 2010
Sierre, Switzerland

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SAC '10 Paper Acceptance Rate 364 of 1,353 submissions, 27%;
Overall Acceptance Rate 1,650 of 6,669 submissions, 25%

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The 40th ACM/SIGAPP Symposium on Applied Computing
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  • (2023)VisaudiBlow: Fine-grained Blowing Interaction Based on Visual and Auditory DetectionExtended Abstracts of the 2023 CHI Conference on Human Factors in Computing Systems10.1145/3544549.3585829(1-6)Online publication date: 19-Apr-2023
  • (2020)Adaptive Blowing Interaction Method Based on a Siamese NetworkIEEE Access10.1109/ACCESS.2020.30043498(115486-115500)Online publication date: 2020
  • (2019)Input Interface Using Wrinkles on Clothes for Wearable ComputingJournal of Information Processing10.2197/ipsjjip.27.9627(96-105)Online publication date: 2019
  • (2019)ChewIt. An Intraoral Interface for Discreet InteractionsProceedings of the 2019 CHI Conference on Human Factors in Computing Systems10.1145/3290605.3300556(1-13)Online publication date: 2-May-2019
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  • (2014)Implementation and evaluation on a concealed interface using abdominal circumferenceProceedings of the 5th Augmented Human International Conference10.1145/2582051.2582102(1-8)Online publication date: 7-Mar-2014
  • (2011)Breathalising gamesProceedings of the 8th International Conference on Advances in Computer Entertainment Technology10.1145/2071423.2071496(1-8)Online publication date: 8-Nov-2011
  • (2011)A tongue input device for creating conversationsProceedings of the 24th annual ACM symposium on User interface software and technology10.1145/2047196.2047210(117-126)Online publication date: 16-Oct-2011
  • (2011)Breath control of amusement ridesProceedings of the SIGCHI Conference on Human Factors in Computing Systems10.1145/1978942.1978955(73-82)Online publication date: 7-May-2011

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