Acoustic Waveforms Acoustic Waveforms Simple Harmonic Motion ...

Speech Waveforms (3)
• A much more detailed discussion of the
following speech waveforms can be found
on the topic web site at:-
http://www.ling.mq.edu.au/speech/acoustics/waveforms/speech_waveforms.html
Speech Waveforms (5)
25
2. Here we compare
the weak murmur in
a voiced stop /d/
occlusion with the
waveforms of /n/
and /l/ and /j/, two
approximates. Note
the fairly simple
waveforms for /d/
and /n/ and the more
complex waveforms
for /l/ and /j/.
Speech Waveforms (4)
40 ms
Speech Waveforms (6)
1. One fricative /h/
and three vowels
with the start of
each pitch cycle
indicated by a
vertical bar.
The different
vowels have
different
waveform
patterns
40 ms 27
40 ms
28
Speech Waveforms (7)
4. Here we can
see different parts
of the same /z/.
Initially the
amount of noise
(randomness) is
slight but it
gradually
strengthens to
compete in
strength with the
regular (voiced)
component.
Speech Waveforms (8)
26
3. /f/ greatly amplified
(is actually about the
same amplitude as
the low intensity part
of /s/ marked with α).
Note the random
pattern for /f/ and /s/
and the slight
amounts of random
pattern superimposed
on a regular pattern
for /v/ and /z/.
5. Here we can
see three CVC
syllables each
starting with /h/
and ending with
/d/. Its difficult to
differentiate the
three vowels
from their pattern
(which looks a
little like a fish
skeleton).
40 ms 29
30
5