Okay. So I'm sort of confused about the concept of determining whether an instrument is closed-closed, open-open, or closed-open.ie. a flute, guitar, sax, oboe, clarinet. For example, is a clarinet a closed-open instrument because your mouth covers the entire mouth piece and the flute is open-open because your mouth doesn't? What are ways one can use to determine this? Thanks in advance.
fn = v(n/2L) n = 1,2,3,...
fn = v(n/4L) n = 1,3,5,...