- Tytuł:
- Single burst acoustic streaming
- Autorzy:
-
Pedersen, G.
Hobćk, H. - Powiązania:
- https://bibliotekanauki.pl/articles/332117.pdf
- Data publikacji:
- 2001
- Wydawca:
- Polskie Towarzystwo Akustyczne
- Opis:
- On a previous occasion we reported observations of a new type of acoustic streaming which only occurred around a needle hydrophone positioned near the focus of a focusing ultrasound transducer. The streaming was observed even at burst repetition frequencies as low as l Hz. In an attempt to find the origin of this streaming attention was focused on possible excitation of evanescent waves on the probe surface. Presently we report results front a new experiment on this subject. Streaming was observed and measured using tiny tracer particles of polyamid which were recorded with a CCD-video camera and a frame grabber in a PC. The frames were analysed with a Matlab-program for obtaining stream lines and velocity measurements in a vertical plane through the sound axis. The results show that we also observe streaming in free field when using burst repetition frequencies lower than l Hz, and even when using single bursts.
- Źródło:
-
Hydroacoustics; 2001, 4; 197-200
1642-1817 - Pojawia się w:
- Hydroacoustics
- Dostawca treści:
- Biblioteka Nauki
Artykuł