TABLE 3.
Results of acoustic profiles measured at different anatomical locations.
| Anatomical locations | Transverse sinus | Transverse-sigmoid junction | Lower curve of sigmoid sinus | Jugular bulb | Upper internal jugular vein | |
|---|---|---|---|---|---|---|
| Position of virtual microphones (Node Numbers) | 82,140 | 23,100 | 80,991 | 24,687 | 751 | |
| VIBRO | Peak amplitude a (dB/dBA) | 119.3/85.4 | 111.2/78.7 | 102.0/69.8 | 103.4/67.7 | 106.2/56.1 |
| RMS amplitude a (dB/dBA) | 82.0/74.1 | 75.4/67.4 | 67.5/59.4 | 64.4/56.2 | 48.6/56.1 | |
| Frequency at peak amplitude (HzdB/HzdBA) | 20.2/264.8 | 20.2/20.2 | 20.2/264.8 | 20.2/264.8 | 20.2/264.8 | |
| HYDRO | Peak amplitude a (dB/dBA) | 74.3/35.8 | 76.3/33.7 | 76.5/29.5 | 80.0/30.0 | 77.7/27.7 |
| RMS amplitude a (dB/dBA) | 23.7/11.7 | 24.2/11.8 | 23.2/10.5 | 23.2/10.2 | 18.5/10.5 | |
| Frequency at peak amplitude b (HzdB/HzdBA) | 20.2/39.1 | 20.2/58.1 | 20.2/39.10 | 20.2/20.2 | 20.2/20.2 | |
a
indicates the amplitude of the observed frequency within 20–1,000 Hz. VIBRO and HYDRO indicates parameters of vibroacoustic and hydroacoustic noise.
b
HzdB/HzdBA indicates the frequency at peak amplitude (dB)/(dBA).