I was digging around in one of my old notebooks dating from the early sixties when I was a postgraduate student at UCL doing a master’s in phonetics and linguistics. One of the things I found was a collection of nonsense words used for ear training in general phonetics. I received this kind of training from J.D. O’Connor, Marguerite Chapallaz, Hélène Coustenoble, and A.C. Gimson.
Alongside I have reproduced fifteen of O’Connor’s words. I assume this page of my notes is a fair copy rather than my own attempts at recognition.
In the first word, kʼoβɓaŋ͡ʇyʔ you will see that four different airstream mechanisms are involved: as well as the default pulmonic egressive, they are glottalic egressive for the ejective kʼ, glottalic ingressive for the implosive ɓ, and velaric ingressive combined with pulmonic egressive for the nasalized dental click ŋ͡ʇ (which nowadays we write ŋ|).
Among the other points of interest are
• (lines 4 and 5) the other two old click symbols, retroflex ʗ (now !) and lateral ʖ (now ǁ).
• (line 5) an ejective cluster, with a bilabial plosive and an alveolar lateral combined in a single “ejection”: I don’t know of any language that has this kind of combination.
• (line 7) the symbol ɐ with a “more open” diacritic, to represent a fully open vowel halfway between cardinal 4 a and cardinal 5 ɑ. Compare this with the “advanced” ɑ in line 3, which shows that we were operating in terms of five degrees of advancement among open vowels: cardinal 4, retracted 4, this central one, advanced 5, cardinal 5.
• (line 8) the symbol ɹ with a subscript dot (= closer), standing for the fricative rather than the default approximant (or “frictionless continuant” as we used to call it in those days).
• (line 10) a velarized voiceless alveolar lateral fricative. Nowadays we would have to write it ɬʷ.
• (line 14) the symbol sf stood for a labiodentalized s. ExtIPA (see the IPA Handbook) now writes this as sʋ.