17.140.50 电声学 标准查询与下载
共找到 947 条与 电声学 相关的标准，共 64 页
BS EN IEC 62127-2 Ultrasonics. Hydrophones - Part 2. Calibration for ultrasonic fields
- ICS
- 17.140.50
- CCS
- 发布
- 2023-11-24
- 实施
- 2023-11-24
本文件规定了便携式听力计的形式规定要求；规定了便携式听力计用于听阈级测试方法的具体要求；规定了便携式听力计的分类标准。本文件适用于符合本文件要求的不同便携式听力计。
portable audiometer
- ICS
- 17.140.50
- CCS
- C358
- 发布
- 2023-08-08
- 实施
- 2023-09-08
Ultrasonics - Measurements of electroacoustical parameters and acoustic output power of spherically curved transducers using the self-reciprocity method
- ICS
- 17.140.50
- CCS
- 发布
- 2023-06-13
- 实施
Ultrasonics - Measurements of electroacoustical parameters and acoustic output power of spherically curved transducers using the self-reciprocity method
- ICS
- 17.140.50
- CCS
- 发布
- 2023-06-13
- 实施
1 Scope This part of IEC 62127 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.
Ultrasonics. Hydrophones. Properties of hydrophones for ultrasonic fields
- ICS
- 17.140.50
- CCS
- 发布
- 2023-02-28
- 实施
- 2023-02-28
IEC 62127-3:2022 is available as IEC 62127-3:2022 RLV which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition.IEC 62127-3:2022 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.
Ultrasonics - Hydrophones - Part 3: Properties of hydrophones for ultrasonic fields
- ICS
- 17.140.50
- CCS
- 发布
- 2023-01-27
- 实施
- 2023-04-23 (7)
Ultrasonics - Pulse-echo scanners - Simple methods for periodic testing to verify stability of an imaging system's elementary performance
- ICS
- 17.140.50
- CCS
- 发布
- 2023-01-13
- 实施
Ultrasonics - Pulse-echo scanners - Simple methods for periodic testing to verify stability of an imaging system's elementary performance
- ICS
- 17.140.50
- CCS
- 发布
- 2023-01-13
- 实施
Ultrasonics - Hydrophones - Part 3: Properties of hydrophones for ultrasonic fields
- ICS
- 17.140.50
- CCS
- 发布
- 2022-12-19
- 实施
- 2022-12-19
This part of IEC 60318 describes a head and torso simulator, or manikin, intended for the measurement of sound sources placed close to the ear in the frequency range from 100 Hz to The manikin described in this document is intended for airborne acoustic measurements only. It is not suitable for measurements which depend upon vibration transmission paths such as bone conduction, or for measurements requiring the simulation of bone or tissue. This document specifies the manikin in terms of both its geometrical dimensions and its acoustical properties. Only manikins compliant with both sets of specifications are in conformance with this document.
Electroacoustics. Simulators of human head and ear - Head and torso simulator for the measurement of sound sources close to the ear
- ICS
- 17.140.50
- CCS
- 发布
- 2022-09-30
- 实施
- 2022-09-30
Electroacoustics ― Methods to determine corrections to obtain the free-field response of a sound level meter
- ICS
- 17.140.50
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- 发布
- 20220906
- 实施
- 20220906
Electroacoustics — Audiometric equipment — Part 2: Equipment for speech audiometry
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- 17.140.50
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- 发布
- 20220906
- 实施
- 20220906
Electroacoustics — Simulators of human head and ear — Part 3: Acoustic coupler for the calibration of supra-aural earphones used in audiometry
- ICS
- 17.140.50
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- 发布
- 20220906
- 实施
- 20220906
Electroacoustics — Audio-frequency induction loop systems for assisted hearing — Part 1: Methods of measuring and specifying the performance of system components
- ICS
- 17.140.50
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- 发布
- 20220906
- 实施
- 20220906
Electroacoustics — Measurement microphones — Part 2: Primary method for pressure calibration of laboratory standard microphones by the reciprocity technique
- ICS
- 17.140.50
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- 发布
- 20220906
- 实施
- 20220906
Electroacoustics — Simulators of human head and ear — Part 5: 2 cm3 coupler for the measurement of hearing aids and earphones coupled to the ear by means of ear inserts
- ICS
- 17.140.50
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- 发布
- 20220906
- 实施
- 20220906
Electroacoustics－Sound level meters－Part 1：Specifications
- ICS
- 17.140.50
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- 发布
- 20220906
- 实施
- 20220906
Electroacoustics — Simulators of human head and ear — Part 6: Mechanical coupler for the measurement of bone vibrators
- ICS
- 17.140.50
- CCS
- 发布
- 20220906
- 实施
- 20220906
Electroacoustics — Measurement microphones — Part 8: Methods for determining the free-field sensitivity of working standard microphones by comparison
- ICS
- 17.140.50
- CCS
- 发布
- 20220906
- 实施
- 20220906
