Hi Mary Beth,
Thank you very much for the information. I believe the studies from Bell Lab are the same or similar ones as those cited in the other references. It used to be a little invasive studies at that time, but I wonder why people are not replicating it with fiberoptic cords these days.
I agree with Randy's interpretation of dampening phenomenon seen in the old stroboscopic studies. But I hope there will be more evidence to establish its functional effect on the timbre or whether it can (or should?) be trained. One may feel like dampening, but possibly in fact thinning the cord or increasing the "supraglottal pressure". Anyway this is a very interesting issue.
Thanks again and best wishes, Sungil
>Ha, I don't have the book in front of me either right now, but I remember >them being done at or courtesy of Bell Laboratories???? > Also, a friend and associate of mine, Randy Buescher, was replying to >my >questions. Here is a quote from him, ".....the folds can damp. Vennard, >Zemlin, Appleman, discuss this and there is ample stroboscopic footage to >show this. I've seen it myuself also under exam. However, I will say this, >not every set of folds damps, yet the registers still connect. I believe >this >is achieved via less vertical depth of the fold being used. Titze has >discussed this and the importance of SUPRAGLOTTAL PRESSURE in this form of >vibration."
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