Speech recordings editing

The audio recorded pairs of the sentences set (with and without pharyngeal bulb) for all participants were randomly mixed and coded with the letters A and B, which meant that the rater did not know which samples (with or without pharyngeal bulb) came from either letters A or B. In addition to the original 30 pair of recordings containing (30 sentences sets recorded with pharyngeal bulb and 30 recorded without pharyngeal bulb of each participant), 20% (6 pairs of sentences sets) of the recordings were randomly duplicated for intra-rater comparison. The edition was made using the Sound Forge Program 10.0 software and transferred to a CD.