Listening test : perceptual evaluation of mouth opening on sustained vowels.
contact : luc.ardaillon@ircam.fr



Thank you for your time! Please read carefully the following information before you start, even though you are used to doing such tests.


This test aims at evaluating the perception of the degree of mouth opening during the pronunciation of sustained vowels.

Before starting the test, please listen to the following sounds of the vowel /a/ pronounced with various degrees of mouth opening, from almost closed to wide open.
Please set the volume to a comfortable level.


level 1 :
level 2 :
level 3 :
level 4 :
level 5 :

You may have noticed that the timbre varies according to the degree of mouth opening, and the perceived vowel can then be different (the /a/ almost sounds like an /o/ when the mouth is more closed).
You are encouraged to try it for yourself before taking the test. For this purpose, pronounce a vowel aloud, and simply vary simplement your mouth opening, by only moving your jaw (the other articulators should remain steady), in order to hear the induced timbre variation.

For each pair of recordings below (each line), select one button depending on which one seem to correspond to the higher degree of mouth opening.

... and the same on the other way.

In order to avoid any ambiguity, the pronounced vowel is given just above each pair of sounds.
Try to use the full scale (from 0 to +3) in both ways.
There is no "correct" answer. It is only about your subjective preference.




Recommendations





/è/ (may)
PairFile1+3+2+10+1+2+3File2Prob
1
/a/ (bat)
PairFile1+3+2+10+1+2+3File2Prob
2
/O/ (more)
PairFile1+3+2+10+1+2+3File2Prob
3
/è/ (may)
PairFile1+3+2+10+1+2+3File2Prob
4
/è/ (may)
PairFile1+3+2+10+1+2+3File2Prob
5
/O/ (more)
PairFile1+3+2+10+1+2+3File2Prob
6
/O/ (more)
PairFile1+3+2+10+1+2+3File2Prob
7
/O/ (more)
PairFile1+3+2+10+1+2+3File2Prob
8
/eu/ (duck)
PairFile1+3+2+10+1+2+3File2Prob
9
/a/ (bat)
PairFile1+3+2+10+1+2+3File2Prob
10
/eu/ (duck)
PairFile1+3+2+10+1+2+3File2Prob
11
/O/ (more)
PairFile1+3+2+10+1+2+3File2Prob
12
/è/ (may)
PairFile1+3+2+10+1+2+3File2Prob
13
/a/ (bat)
PairFile1+3+2+10+1+2+3File2Prob
14
/O/ (more)
PairFile1+3+2+10+1+2+3File2Prob
15


Once finished, you can reassess the comparisons as many times as you want.



Some information about you.

What's your mother tongue ?
Are you
Female Male
Age years
How did you listen to the sounds ?
Headphones Earphones Loudspeakers
Do you play any musical instrument (including singing) ?
Yes No
What is your level in singing? (on a 0-5 scale: 0=do not sing; 5=professional singer)
Are you a professionnal involved in audio processing (e.g. sound engineer, researcher in audio processing) ?
Yes No
Are you familiar with listening tests ?
Yes No
Are you familiar with voice synthesis techniques ?
Yes No
(optional) Leave your e-mail address ...
(optional) ... if you want to leave a message:

Please, check that all pairs are evaluated, then

The sounds used in this test are under Copyright © 2017 Ircam, Institut de recherche et coordination acoustique/musique.