American Institute for Voice and Ear Research

Ultrasonic Metal Welding is a type of welding used in the production of electric car batteries. Currently, it suffers from quality fluctuations, and there is a need for online quality control techniques. One technique being investigated involves the measurement of the vibrations of the welding horn using laser vibrometry. However, this comes with two obstacles. First, measurements close to the welding site, which contain the most information, are difficult to do. This is due to the interference of particles ejected during welding, which interfere with the laser beam. Second, it is possible that the use of reflective tape for vibrometry changes the vibrations measured, due to heating of the horn during welding. This work investigates these problems and presents some solutions. The effects of the reflective tape on the measurement is investigated, by measuring the vibrations of the horn during welding and free run, with and without reflective tape, and with and without prior heating of the tape. Furthermore, the interference of ejected particles is minimized using a special experimental setup, and measurements are done without any reflecting tape.

The power extraction circuit in an lOT (Inductive Output Tube) is a resonant circuit made of actual inductors and capacitors at low frequencies (3–10 MHz) due to the size limitation of a cavity. To build a mobile, low frequency range, high power sources for ionospheric heating with high efficiency and tunability, we need a constant impedance to decelerate the beam at all frequencies [1]. This paper discusses the design and construction of pi-circuit for two different gun designs: 70kV - 30A & 20 kV - 1A guns [2]. While the tunability is achieved by variable capacitors, the high efficiency is limited by the internal resistance of the inductor in the pi-circuit.

(2007). Essay Management of Gender Reassignment (Sex Change) Patients. Voice and Speech Review: Vol. 5, Voice and Gender, pp. 224-228.

No AccessPerspectives on Voice and Voice DisordersArticle1 Jul 2003Providing Speaking Voice Therapy to Professional Singers: Meeting the Challenge Michelle Horman Michelle Horman The American Institute for Voice and Ear Research Philadelphia Google Scholar More articles by this author https://doi.org/10.1044/vvd13.2.33 SectionsAboutFull TextPDF ToolsAdd to favoritesDownload CitationTrack Citations ShareFacebookTwitterLinked In "Providing Speaking Voice Therapy to Professional Singers: Meeting the Challenge." Perspectives on Voice and Voice Disorders, 13(2), pp. 33–34 Additional Resources FiguresReferencesRelatedDetails Volume 13Issue 2July 2003Pages: 33-34 Get Permissions Add to your Mendeley library History Published in issue: Jul 1, 2003 Metrics Topicsasha-topicsasha-sigsasha-article-typesleader-topicsCopyright & Permissions© 2003 American Speech-Language-Hearing AssociationPDF downloadLoading ...