title: 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.
authors.forename: Russell S
authors.initials: RS
authors.lastname: Witte
authors.forename: Tim
authors.initials: T
authors.lastname: Hall
authors.forename: Ragner
authors.initials: R
authors.lastname: Olafsson
authors.forename: Sheng-Wen
authors.initials: SW
authors.lastname: Huang
authors.forename: Matthew
authors.initials: M
authors.lastname: O'Donnell