Table 2.
Effects of sudden frequency changes in excised canine larynges. The experimental conditions are described in the second column. The average values of four glottal parameters, namely fundamental frequency, subglottal pressure, pressure amplitude and flow rate, before and after the sudden change are presented in the columns.
| Larynx & Case | Experimental Condition | Freq1 Hz |
Freq2 Hz |
Ps1 cm H2O |
Ps2 cm H2O |
Pa1 cm H2O |
Pa2 cm H2O |
Flow1 cm3/s |
Flow2 cm3/s |
|---|---|---|---|---|---|---|---|---|---|
| CL33as2 | No Elongation, PFS− | 140.4 | 357.2 | 23.4 | 18.5 | 9.3 | 5.2 | 1132 | 1243 |
| CL33fs2 | Elongation=2mm, PFS− | 154.5 | 355.1 | 26.7 | 17.5 | 13.6 | 5.2 | 969 | 1144 |
| CL33gs2 | SG Removed, PFS− | 273.1 | 299.2 | 21.9 | 17.0 | 11.7 | 4.7 | 1151 | 1165 |
| CL38bs2 | Adduction=100g, PFS− | 132.6 | 284.1 | 31.6 | 19.1 | 8.4 | 6.4 | 632 | 859 |
| CL38cs2 | Adduction=150g, PFS− | 132.1 | 283.6 | 33.1 | 19.1 | 8.8 | 6.5 | 643 | 858 |
| CL40es3 | Adduction=100g, PFS+ | 129.1 | 162.5 | 21.1 | 17.7 | 6.7 | 3.4 | 651 | 922 |
| CL64cs1 | Adduction=150g, PFS+ | 195.4 | 231.6 | 20.3 | 22.5 | 10.6 | 4.1 | 388 | 459 |
| CL67es2 | Adduction=250g, PFS− | 251.1 | 389.9 | 20.4 | 13.9 | 2.7 | 1.9 | 646 | 503 |
| CL56es4 | Adduction=300g, PFS− | 169.4 | 292.7 | 31.1 | 27.0 | 9.2 | 3.8 | NA | NA |
| CL52hs1 | Inc. Adduction Sweep | 197.2 | 429.4 | 23.3 | 25.4 | 8.6 | 9.4 | 1455 | 1429 |
| CL54cs2 | Dec. Adduction Sweep | 110.3 | 158.0 | 22.6 | 25.7 | 4.6 | 9.3 | 742 | 715 |
| CL56js1 | Inc. Manual Elongation | 168.2 | 422.1 | 33.2 | 29.7 | 10.0 | 1.6 | NA | NA |
| CL33fs1 | Elongation=2mm, PFS+ | 371.6 | 155.6 | 20.3 | 27.0 | 7.3 | 14.2 | 1202 | 996 |
| CL33gs1 | SG Removed, PFS+ | 282.8 | 134.6 | 12.9 | 20.2 | 3.4 | 11.0 | 789 | 997 |
| CL34ds3 | Elongation=2mm, PFS+ | 373.4 | 161.5 | 23.9 | 33.4 | 7.7 | 17.9 | 1496 | 1353 |
| CL40fs1 | Adduction=150g, PFS+ | 167.3 | 125.3 | 15.1 | 18.7 | 3.4 | 6.0 | 530 | 218 |
| CL41cs1 | Adduction=50g, PFS+ | 327.0 | 180.5 | 12.4 | 18.2 | 0.7 | 4.3 | 344 | 529 |
| CL52ls1 | Inc. Elongation Sweep | 307.0 | 265.0 | 14.3 | 15.8 | 3.0 | 2.2 | 134 | 130 |
| CL56bs1 | Inc. Adduction Sweep | 302.9 | 157.5 | 28.8 | 31.8 | 10.3 | 14.0 | NA | NA |
The abbreviations are:
NA: Not available
SG: Supraglottic Structure
PFS: Pressure-flow Sweep (+ for upward, − for downward)
Freq1 & Freq2: Frequencies before and after sudden changes
Ps1 & Ps2: Average subglottal pressure values
Pa1 & Pa2: Average subglottal pressure amplitudes
Flow1 & Flow2: Average flow rate values