Inexpensive Acoustoelectric Hydrophone For Mapping High Intensity Ultrasonic Fields.

ABSTRACT: We describe an inexpensive alternative to conventional hydrophones for measuring ultrasonic fields. The hydrophone, composed of common laboratory supplies, depends on the acoustoelectric (AE) effect, a well-known interaction between electrical current and pressure. Beam patterns of a 540 kHz annular transducer captured using a bowtie graphite hydrophone were consistent with patterns obtained using conventional, more expensive hydrophones. The AE signal was proportional to both the applied bias current (1.83 µV/mA) and pressure (13.3 µV/MPa) with sensitivity better than 50 kPa. Disposable AE hydrophones may be an attractive alternative for clinical applications that require close monitoring of high intensity acoustic fields.

SUBMITTER: Witte RS 

PROVIDER: S-EPMC2600872 | biostudies-literature | 2008

REPOSITORIES: biostudies-literature