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UW-Madison BME 300 - Adjustable wave tube stand for Acoustic Reflection Technique

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Adjustable wave tube stand for Acoustic Reflection Technique Week: October 12 – October 19th Client: Erin Douglas, MS-CCC-SLP 430 Waisman Center Phone: 608-263-5610 Email: [email protected] Advisor: Dr. Willis J. Tompkins 2134 Engineering Centers Building Phone: 608-263-1581 Email: [email protected] Team: Ryan Carroll – Team Leader Jeremy Glynn– Communications Andrew Bremer – BWIG Ben Engel – BSAC Problem Statement The Vocal Tract Development lab (VT Lab) plans to compare anatomic measurements secured from Acoustic reflection technology (ART)- also known as acoustic pharyngometry with measurements secured from imaging studies (MRI & CT). ART is new to our lab and for the purpose of measurement reliability we need to have a stand developed for the ART wave tube. Please see description of the technology below. ART is a non-invasive, objective assessment of the vocal tract, which provides the cross-sectional area and volume of the upper airway. Acoustic Reflection Technique (ART) entails for the participant to exhale slowly into a wave tube. The wave tube has a mouth piece that keeps the subject's tongue in position not blocking the airway - and ensures that all exhaled air passes through it. Sounds waves are emitted and the system's microphone captures the acoustic reflections of the airway. The system then measures the amplitude of the reflections and time of arrival at the microphone and constructs a plot of airway area and distance from the lips/teeth (0 point on x-axis) to the glottis (Xue & Hao, 2006). Although ART has been available for about two decades (Fredberg et al, 1980; Hoffstein & Fredberg, 1991), only a limited number of studies that have examined the actual anatomic correlates of ART. Of those studies, only select ART measurements have been studied and those are reported to match with anatomic measurements obtained through MRI (Tameem & Mehta, 2004) and CT (D'Urzo et al, 1987; D'Urzo et al., 1988). Currently, researchers in the VT Lab need to hold the wave tube in their hands which is presenting variability in the data. It is difficult to hold the wave tube at the same angle during each trial within subjects and across subjects. Hood Laboratories, the company who makes AR technology, reports that they will not be offering an adjustable stand at this time or in the near future to keep the wave tube stable while testing in the upright and supine position. We are requesting for the BME team to design and build a steady stand for the ART wave tube. The stand should be adjustable so that it may be used by individuals of different ages -- young children to adult. Also, the stand must allow thepatient's head to remain in a standardized position in the upright and supine position. Another important criterion is that the stand/unit should be easy to clean and disinfect. Last Week’s Goals • Design presentation. • Ordering the MB1 stand if it does, in fact, fit our design. • Finishing solidworks for the holder piece so that it can be milled with the C & C Accomplishments • Finished powerpoint presentation. • Purchased MB1 Microphone stand. • Ordered sample material for gripping interface. Received silicone and foam samples. • Purchased rubber straps. • Solidworks imaging completed. This Week’s Goals • Brush up the Solidworks images before manufacturing. • Purchase HDPE block for manufacturing • Obtain MB1 Stand and assess • Decide on gripping material • Okay with client before manufacturing. • Attend Solidworks lectures Difficulties • None Team Effort Team Member Accomplishments Time (Hrs) Running Total (Hrs) Ryan Carroll Progress Report, Materials Research, Presentation 4 16 Ben Engel Materials Research, Solidworks, Presentation 4 16 Jeremy Glynn Materials Research, Client contacting, Presentation 4 16 Andrew Bremer Presentation, Materials Research, Website 4 16Project Schedule TASK SEPT OCT NOV DEC DATES 14 21 28 5 12 19 26 2 9 16 23 30 7 14 21 28WORK Brainstorming Research Designing Prototype Selecting Prototype Obtaining Materials Building Prototype Testing Prototype Modifications DELIVERABLES PDS Mid-Sem. Report Mid-Sem. Presentation Final Report Final Presentation Weekly Reports Notebooks MEETINGS Team Meetings Client Meetings Advisor Meetings BSAC Meetings OTHER Web Page Special Lectures Expenses to Date: • MB1 Boom Stand – $34.98 • Rubber Strap -


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UW-Madison BME 300 - Adjustable wave tube stand for Acoustic Reflection Technique

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