The stød is sometimes referred to as a "glottal catch", and in very deliberate
speech may be realized as a glottal stop. The more usual manifestation seems to be
a period of irregular voicing (creaky voice). It seems celar that it cannot be
regarded as a secondary articulation attached to a particular segment. It may appear
in both consonants and vowels, the location of its appearance depending on the
syllable structure (see Laver, 1994, p.330).
mḭ:l ("mile")
mil̰ ("mild")
fṵ:l ("bird")
ful̰ ("full")
hans ("his", no stød)
han̰s ("Hans")
Audio Source:
Sounds of the Worlds Languages.
References:
Laver, J. (1994): Principles of Phonetics. Cambridge University Press.
Ladefoged, P. / Maddieson, I. (2008): The Sounds of the World's Languages. Malden, MA: Blackwell.