The Difference Between Phonetics and Phonology
Phonology concerns itself with systems of phonemes, abstract cognitive units of speech sound or sign which distinguish the words of a language. Phonetics, on the other hand, concerns itself with the production, transmission, and perception of the physical phenomena which are abstracted in the mind to constitute these speech sounds or signs.
Using an Edison phonograph, Ludimar Hermann investigated the spectral properties of vowels and consonants. It was in these papers that the term formant was first introduced. Hermann also played back vowel recordings made with the Edison phonograph at different speeds in order to test Willis' and Wheatstone's theories of vowel production.
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“Man is the only animal that laughs and weeps; for he is the only animal that is struck with the difference between what things are and what they ought to be.”
—William Hazlitt (1778–1830)