Time-frequency analysis of venous pulsatile flow and sigmoid sinus vascular wall displacement causing pulsatile tinnitus using time series and magnitude squared coherence methods

Displacement of the sigmoid sinus vascular wall and intrasinus blood flow motion is known to cause pulsatile tinnitus (PT) in patients with plate dehiscence. To investigate source sound that causes PT, this study sought determine correlation between vivo displacement hemodynamics. A confocal laser sensor color-coded Doppler ultrasound system were implemented on a participant diagnosed venous PT. The velocity data analyzed using time series magnitude squared coherence methods. median peak values 6.7 [Formula: see text]m 11.7 text]m, respectively. major frequency range was below 4 Hz. portmanteau test rejected for different m. cross-correlation two processes not zero, indicating existence cross-correlation. gauged signals 0.3 at 7.143 temporally correlated flow, although induced fell human hearing threshold. Therefore, hydroacoustic vibroacoustic sounds by fluid–structure interaction osseous structures overweighed focal dehiscence area PT production.