Hydrophone
Overview
- A hydrophone is a transducer, which is specially designed for receiving ultrasound. It can receive ultrasound of wide frequency range at high resolution in water in order to measure the acoustic field.
- Needle hydrophones: It is useful when you require spatial resolution.
- Large-diameter hydrophones: It is useful when you require high sensitivity.
Specifications of the needle hydrophone
| Effective diameter | 0.5mm (we can manufacture from 0.25mm to 1mm) |
|---|---|
| Outer diameter at tip | 1.4 mm |
| Length | 74 mm |
| Receivable frequency | 1MHz-20MHz |
| Sensitivity | 40 nV/Pa at 3MHz (typical) |
| Electrical properties | -500 ohm (imaginary) |
| Cable length | 1 m : a coaxial cable with a BNC connector |
| Miscellaneous | Certification of the calibration can be provided if needed (require extra fees) |
An example of sensitivity measurement of the large-diameter hydrophone
