Mandy-Suzanne Wong is discussing different approaches to what sound arts may and may not mean based on insight into history of various ways how sound was used for creative purposes. She is pointing out that term “sound art” was used for the first time by the American composer William Hellerman in 1983 however her reach into possibility of artistic expression through sound out of conventional music goes back to the beginning of 20th Century by mentioning aestheticization of noise and machinery by Italian Futurists.
I found particularly interesting points about questioning relation between sound art and other art forms. Mandy-Suzanne Wong says that sound art may explicitly include or exclude other art forms. This unbalance brings me to the thought that sound art as a quite modern form of art seemes to be rooted in questioning of its own existence and in comparison to other art forms seems to be inherently philosophical.
Another interesting point is that research into sound arts has been undertaken rather by visual artists than musicologists. This suggests obvious diversion from conventional music and perceives sound art as something else. Is music as an organised artistic expression through sound waves part of sound art or is sound art an experimental form of music? This is another question arising.