YY/T 0865.1-2024Ultrasonics - Hydrophones - Part 1: Measurement and characterization of medical ultrasonic fields (English PDF)

1 Scope

This document describes a method for measuring the acoustic field produced by medical ultrasound equipment in liquids using calibrated hydrophones, including

Bandwidth standards and calibration frequency range requirements for the spectral components of the sound field to be characterized.

This document.

--- A set of measurable acoustic parameters based on acoustic foundations is given;

--- A set of auxiliary acoustic parameters that can be derived under specific assumptions of these measurements are given, called derived acoustic parameters;

--- Gives the measurement steps that can be used to determine the sound pressure parameters;

--- Gives the conditions for measuring acoustic parameters using calibrated hydrophones;

---Procedures for correcting for limitations caused by using hydrophones with limited bandwidth and limited sensitive element size are given, and the to estimate the corresponding uncertainty.

This document applies to the measurement and characterization of medical ultrasound fields using ultrasound hydrophones.

NOTE 1.The International System of Units is used in this document. For certain parameters, such as beam area and sound intensity, decimal multiples or sub-multiples are used for simplicity.

For example, the sound beam area is expressed in cm2, and the sound intensity is expressed in W/cm2 or mW/cm2.

NOTE 2 By definition, hydrophones may be of either piezoelectric or fibre optic type.

2 Normative references

The contents of the following documents constitute essential clauses of this document through normative references in this document.

For referenced documents without a date, only the version corresponding to that date applies to this document; for referenced documents without a date, the latest version (including all amendments) applies to

This document.

GB/T 3359 Statistical processing and interpretation of data - Determination of statistical tolerance intervals (GB/T 3359-2009, ISO 16269-6.

2005, IDT)

YY/T 0750 Requirements and measurement methods for sound fields in the frequency range of 0.5MHz to 5MHz for ultrasonic therapy equipment (YY/T 0750-

2018,IEC 61689.2013,MOD)

YY/T 0865.2 Ultrasonic hydrophones Part 2.Calibration of hydrophones for ultrasonic fields below 40 MHz (YY/T 0865.2-

2018,IEC 62127-2.2013,IDT)

YY/T 0865.3 Ultrasonic hydrophones Part 3.Characteristics of hydrophones for ultrasonic fields below 40 MHz (YY/T 0865.3-

2013,IEC 62127-3.2007,IDT)

JJF1059.1-2012 Evaluation and expression of measurement uncertainty (ISO /IEC Guide98-3, MOD)

IEC 60565-1 Underwater acoustics - Hydrophone calibration - Part 1.Free-field calibration procedure for hydrophones hydrophones)

IEC 63009 Ultrasonic therapy equipment - Sound field requirements and measurement methods in the frequency range of 20kHz to 500kHz

20kHzto500kHz) […]