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3D simulation of an audible ultrasonic electrolarynx using difference waves.

Mills P, Zara J - PLoS ONE (2014)

Bottom Line: Although implanted prosthetics are commonly used in developed countries, simple handheld vibrating electrolarynxes are still common worldwide.To address some of these drawbacks, we introduce a novel electrolarynx that uses vibro-acoustic interference of dual ultrasonic waves to generate an audible fundamental frequency.A 3D simulation of the principles of the device is presented in this paper.

View Article: PubMed Central - PubMed

Affiliation: School of Engineering & Applied Science, The George Washington University, Washington, DC, United States of America.

ABSTRACT
A total laryngectomy removes the vocal folds which are fundamental in forming voiced sounds that make speech possible. Although implanted prosthetics are commonly used in developed countries, simple handheld vibrating electrolarynxes are still common worldwide. These devices are easy to use but suffer from many drawbacks including dedication of a hand, mechanical sounding voice, and sound leakage. To address some of these drawbacks, we introduce a novel electrolarynx that uses vibro-acoustic interference of dual ultrasonic waves to generate an audible fundamental frequency. A 3D simulation of the principles of the device is presented in this paper.

No MeSH data available.


Related in: MedlinePlus

Transverse view of simulation pressures at z = 278 mm, t = 63.7 ms at 200 Hz.
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pone-0113339-g003: Transverse view of simulation pressures at z = 278 mm, t = 63.7 ms at 200 Hz.

Mentions: Commercially available low-frequency ultrasonic transducers have a typical radius of 5–10 mm. We model 6 mm radius ultrasonic transducers as sinusoidal hard point sources; to simulate the hemispherical nature of the transducers we included a 4 mm polypropylene foam baffle behind the sources. Figure 3 shows the two sources and seven microphones as square icons. Source 1 is located at (249 mm, 202 mm, 278 mm) and source 2 at (269 mm, 202 mm, 278 mm).


3D simulation of an audible ultrasonic electrolarynx using difference waves.

Mills P, Zara J - PLoS ONE (2014)

Transverse view of simulation pressures at z = 278 mm, t = 63.7 ms at 200 Hz.
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4234661&req=5

pone-0113339-g003: Transverse view of simulation pressures at z = 278 mm, t = 63.7 ms at 200 Hz.
Mentions: Commercially available low-frequency ultrasonic transducers have a typical radius of 5–10 mm. We model 6 mm radius ultrasonic transducers as sinusoidal hard point sources; to simulate the hemispherical nature of the transducers we included a 4 mm polypropylene foam baffle behind the sources. Figure 3 shows the two sources and seven microphones as square icons. Source 1 is located at (249 mm, 202 mm, 278 mm) and source 2 at (269 mm, 202 mm, 278 mm).

Bottom Line: Although implanted prosthetics are commonly used in developed countries, simple handheld vibrating electrolarynxes are still common worldwide.To address some of these drawbacks, we introduce a novel electrolarynx that uses vibro-acoustic interference of dual ultrasonic waves to generate an audible fundamental frequency.A 3D simulation of the principles of the device is presented in this paper.

View Article: PubMed Central - PubMed

Affiliation: School of Engineering & Applied Science, The George Washington University, Washington, DC, United States of America.

ABSTRACT
A total laryngectomy removes the vocal folds which are fundamental in forming voiced sounds that make speech possible. Although implanted prosthetics are commonly used in developed countries, simple handheld vibrating electrolarynxes are still common worldwide. These devices are easy to use but suffer from many drawbacks including dedication of a hand, mechanical sounding voice, and sound leakage. To address some of these drawbacks, we introduce a novel electrolarynx that uses vibro-acoustic interference of dual ultrasonic waves to generate an audible fundamental frequency. A 3D simulation of the principles of the device is presented in this paper.

No MeSH data available.


Related in: MedlinePlus