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Looper's Delight
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I'd think a crystal water glass would provide a clearer demonstration and analysis of the fundamental vibrational modes. Fairly uniform shape and wall thickness, and tighter more uniform crystalline structure than the hammered alloy. -HS At 03:53 PM 10/18/00 -0700, you wrote: >Is a 15" loudspeaker cone small? The 20" bowls vibrating surface is >larger than the speaker size that is commonly used for generating loud, >low freq. I have casually mapped the vibrating surface and it seems to >be virtually the entire sides of the bowl, down to the start of the >base. The bowl is small, but the radiating surface of the bowl seems >large to me. But small and large are relative terms, aren't they? > >Regarding efficiency, I cannot say how efficient the bowls are. As you >play them you constantly put energy into them. I make no claims for >the bowls efficiency, but they could be inefficient (and per stated >principles) and still be loud and low freq. It tires me to play them >for very long, but I'm not sure how to quantify the energy I put into >the bowl from the playing (how efficient is the energy transfer from my >hand to the stick to the bowls edge?). A single strike to the bowl >will excite it at the low fundamental, if you hit it in the right area. > >Anyway, I am very curious about what is happening, and sorry if this >thread is wearing thin for some of you. I find the singing bowls >fascinating and fun, and it is my nature to try and figure out how >things work, especially sound (I too am an engineer, but acoustics are >only a part of my job with disk drive design). >I'll shut up now, and see what I measure. >bret > >__________________________________________________ >Do You Yahoo!? >Yahoo! Messenger - Talk while you surf! It's FREE. >http://im.yahoo.com/ > > > http://www.starrlabs.com