After collecting the QoS information of each link, the MR-BS deduces the global QoS that can be guaranteed over the whole path (branch) as the maximum value of delays over the links forming the path, the minimum values of rates over the links forming the path and the maximum value of jitters over the links forming the path.
The mean values of jitter are presented in Figure 8. Obviously, HHO increase jitter.
Furthermore, postoperative values of Jitter (local), Shimmer (local) and NHR in both genders of UVFP group also showed no significant differences compared with the corresponding gender in the control group (P>0.05, see Table 4).
Postoperative values of Jitter (local), Shimmer (local) and NHR in UVFP group were significantly lower than the corresponding preoperative values (P<0.001, see Table 3), and no significant differences were observed in the postoperative values between UVFP group and the control group (P>0.05, see Table 4).
Values of jitter significantly varied between the groups postoperatively (Z = 9.941, P = 0.003).
Table 4 shows statistically different values of jitter (ppq5), shimmer (apq11), and HNR between the normal and pathologic voices.
In addition to the perceptive alterations, UVFP also results in higher values of jitter and shimmer and lower values of the harmonics-to-noise ratio (HNR) [ 1– 4, 8].
Values of jitter and shimmer above a certain threshold are considered being related to pathological voices, usually perceived as breathy, rough, or hoarse voices.
This is probably a result of irregular vibration pattern and patients' inability to compensate newly created incomplete glottis occlusion, confirmed by recorded values of jitter and shimmer which were higher in both groups 12 months after the treatment.
