+AMD1:2026 CSV 超声学 - 水听器 - 第 3 部分：超声场中水听器的特性

[中文适用范围]： IEC 62127-3:2022+AMD1:2026 CSV 标准规定了水听器的相关特性。该文件适用于： - 采用压电传感器元件的水听器，用于测量超声波设备产生的脉冲和连续波超声场； - 用于水中测量的水听器； - 带或不带前置放大器的水听器。 IEC 62127-3:2022 版废止并替代了 2007 年发布的首版及 2013 年的第 1 号修正案。本版为技术修订版，相较于前一版本，主要技术变更包括： a) 取消了 40 MHz 的上限频率规定； b) 修订了水听器灵敏度定义，将灵敏度明确为复数形式的量； c) 根据 Annex B（附录 B）所述原理，调整了确定水听器有效尺寸的 procedure； d) 修改了需提供水听器有效尺寸所对应的频率要求，以适应更宽频段的实际使用需求； e) 新增 Annex B 与 Annex C； f) 更新了 Annex A，以反映规范性部分的变更。 [外文原描述]： CORRECTED VERSION 2026-03 IEC 62127-3:2022+AMD1:2026 CSV specifies relevant hydrophone characteristics. This document is applicable to: - hydrophones employing piezoelectric sensor elements, designed to measure the pulsed and continuous wave ultrasonic fields generated by ultrasonic equipment; - hydrophones used for measurements made in water; - hydrophones with or without an associated pre-amplifier. IEC 62127-3:2022 cancels and replaces the first edition published in 2007 and Amendment 1:2013. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition. a) The upper frequency limit of 40 MHz has been removed. b) Hydrophone sensitivity definitions have been changed to recognize sensitivities as complex-valued quantities. c) Procedures to determine the effective hydrophone size have been changed according to the rationale outlined in Annex B. d) Requirements on the frequencies for which the effective hydrophone size shall be provided have been changed to achieve practicality for increased frequency bands. e) The new Annex B and Annex C have been added. f) Annex A has been updated to reflect the changes of the normative parts.