What is BS EN IEC 60565‑2 - Calibration of hydrophones about?
BS EN IEC 60565‑2 is a safety standard on hydrophones. BS EN IEC 60565‑2 specifies the methods for low-frequency pressure calibration of hydrophones at frequencies from 0,01 Hz to several kilohertz depending on the calibration method. Hydrophones are calibrated periodically in order to maintain a valid calibration status.
Who is BS EN IEC 60565‑2 - Calibration of hydrophones for?
BS EN IEC 60565‑2 on hydrophones is relevant to:
- Maritime industries
- Professionals of acoustic measurement
- Acoustical oceanographers
- Testing authorities
- Manufacturers of hydrophones
Why should you use BS EN IEC 60565‑2 - Calibration of hydrophones?
A hydrophone is an electroacoustic transducer that produces electrical voltages in response to water-borne pressure signals. BS EN IEC 60565‑2 allows you to establish the procedures for low-frequency pressure calibrations of hydrophones in the frequency range from 0,01 Hz to several kilohertz to ensure the correctness of the calibrations, the hydrophones to be calibrated are "rigid" hydrophones with small size compared to the acoustic wavelength, and are not sensitive to vibration when calibrated.
BS EN IEC 60565‑2 provides principles, procedures, and uncertainties of physical calibrations such as hydrostatic excitation, piezoelectric compensation, pistonphone, vibrating column, static pressure transducer, etc., and reciprocity calibrations in acoustic couplers. Calibrations are to be carried out using one of these methods, depending on the different principles to be used, and its limitations to the sound field, and the frequency range.
Overall, BS EN IEC 60565‑2 is useful as it assists with the procedures for low-frequency pressure calibration which can help you out in your business.
What’s changed since the last update?
BS EN IEC 60565‑2:2019 supersedes BS EN 60565:2007, which has been withdrawn.
BS EN IEC 60565‑2:2019 includes the following significant technical changes with respect to the previous edition:
- A relative calibration method has been added to Clause 8: Calibration by piezoelectric compensation
- A relative calibration method has been added to Clause 11: Calibration by vibrating column
- Clause 12: Calibration by a static pressure transducer, has been added
- Annex A: Equivalent circuit of the excitation system for calibration with a vibrating the column has been deleted
IEC 60565 has been divided into two parts:
- Part 1: Procedures for free-field calibration
- Part 2: Procedures for low-frequency pressure calibration (BS EN IEC 60565‑2:2019)
