L306 Phonetics
Lab 4: Cues for /r,l,j,w/
March 3, 2006

Turn in on Wednesday, March 8, 2006                                                Name _____________________


1. Find Wavesurfer under Start/Programs/Departmental Software/Wavesurfer

2. Make a shortcut for it on your desktop by right clicking on the Wavesurfer icon.

3. Try a test recording of your own voice in Wavesurfer by clicking on the red dot (Record) toward the right.  As soon as you click, the recording will begin. Say a few syllables and click the black square (for Stop). Then click on the rightward  triangle  (for Play) and you should hear what you recorded.

  To get audio files
     1. Rightclick on My Network Places.
     2. Leftclick on Map Network Drive
     3. In the Folder box type  \\bl-llab-media1\collect$  (that is `media-one' in the middle)
     4. Click Finish
    5. Look for the L306 directory to find our audio files.

The mission today is spectrogram reading -- in particular to learn to differentiate /r,l,w,j/  and stop place of articulation on spectrograms.  Download the appropriate audio files and study them.   Compose some textual rules for making the differentiations.  Test your rules by making recordings of your own voice of some minimal or near-minimal pairs to confirm your description.

Exercise 1:  /w/ vs. /l/
1. Copy file l-w.wav and l-w2.wav  onto your desktop.
          2.  Study the Wavesurfer spectrograms and compose some textual descriptions for distinguishing /l/ from /w/ in various positions. Notice the two main allophones of /l/. 

Exercise 2:   /l/ vs. /r/
          1.   Copy r-l.wav into Wavesurfer

           2.  Compose some rules for distinguishing /r/  from /l/ in various positions. Is there anything distinctive about the clusters?

Exercise 3:  Test yourself.
            1. Copy  test1.wav, test2.wav and test3.wav   but do not listen to them.  Can you identify the glides from the spectrograms?

Exercise 4:  Place of articulation
           1. Pick up stop-place.wav and try to write some rules for identifying the place of articulation of the stop.  You may need to modify the rules for the clusters.