L31 电声器件 标准查询与下载
共找到 394 条与 电声器件 相关的标准，共 27 页
Electroacoustics. Simulators of human head and ear. Acoustic coupler for the calibration of supra-aural earphones used in audiometry
- ICS
- 13.140;17.140.50
- CCS
- L31
- 发布
- 2015-02-28
- 实施
- 2015-02-28
Electroacoustics. Hearing aids. Induction-loop systems for hearing aid purposes. System performance requirements
- ICS
- 17.140.50
- CCS
- L31
- 发布
- 2015-02-28
- 实施
- 2015-02-28
Electroacoustics - Audio-frequency induction loop systems for assisted hearing - Part 1: Methods of measuring and specifying the performance of system components
- ICS
- 11.180.15
- CCS
- L31
- 发布
- 2014-12
- 实施
- 2014-12-20
This part of IEC 60318 specifies an acoustic coupler for the measurement of supra-aural audiometric earphones in the frequency range from 125 Hz to 8 000 Hz. The sound pressure developed by an earphone is not@ in general@ the same in the coupler as in a person's ear. However@ the acoustic coupler can be used as an objective and reproducible means of measuring the output of supra-aural earphones. It can be used for specifying reference equivalent threshold sound pressure levels (RETSPL) for the calibration of audiometers.
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
- CCS
- L31
- 发布
- 2014-12
- 实施
- 2014-12-13
Electroacoustics - Audio-frequency induction loop systems for assisted hearing - Part 1: Methods of measuring and specifying the performance of system components
- ICS
- 11.180.15
- CCS
- L31
- 发布
- 2014-12
- 实施
Electroacoustics. Audio-frequency induction loop systems for assisted hearing. Methods of calculating and measuring the low-frequency magnetic field emissions from the loop for assessing conformity with guidelines on limits for human exposure
- ICS
- 17.140.50
- CCS
- L31
- 发布
- 2014-11-30
- 实施
- 2014-11-30
이 표준은 2 000 Hz(c/s) 이하의 주파수에서 a.c. 전원으로부터 d.c. 전력을 공급하는 데 사용되는 셀레늄 및 산화구리 스택, 정류기 및 정류기 장비에 적용된다. 이 표준은 통신 장치에 대한 전원을 위해 사용되는 것은 제외하고 통신 정류기에는 적용되지 않으며 측정 기기의 보조로 사용되는 정류기에도 적용되지 않는다.?
Recommendations for polycrystalline semiconductor rectifier stacks and equipments
- ICS
- 29.160.10
- CCS
- L31
- 发布
- 2014-10-06
- 实施
- 2014/10/6
This part of IEC 62489 applies to audio-frequency induction-loop systems for assisted hearing. It may also be applied to such systems used for other purposes@ as far as it is applicable. The standard is intended for assessment of human exposure to low-frequency magnetic fields produced by the system@ by calculation and by in-situ testing. This standard does not deal with other aspects of safety@ for which IEC 60065 applies@ or with EMC.
Electroacoustics - Audio-frequency induction loop systems for assisted hearing - Part 2: Methods of calculating and measuring the low-frequency magnetic field emissions from the loop for assessing conformity with guidelines on limits for human exposure
- ICS
- 11.180.15;17.140.50
- CCS
- L31
- 发布
- 2014-09-01
- 实施
- 2014-10-02
La présente partie de la CEI 61162 contient les exigences pour la communication des données entre les instruments maritimes électroniques, les équipements de navigation et de radiocommunications lorsqu'ils sont interconnectés via un système approprié.La présente partie de la CEI 61162 est destinée à supporter l'émission unidirectionnelle de données série entre un émetteur unique et un ou plusieurs récepteurs. Ces données sont au format ASCII imprimable et peuvent inclure des informations telles que la position, la vitesse, la profondeur, l'allocation de fréquences, etc. Les messages types peuvent être de longueur comprise entre environ 11 et 79 caractères a
Maritime navigation and radiocommunication equipment and systems - Digital interfaces - Part 1 : single talker and multiple listeners
- ICS
- 33.060.20;47.020.70
- CCS
- L31
- 发布
- 2014-07-04
- 实施
- 2014-07-04
Electroacoustics - Sound level meters - Part 2: Pattern evaluation tests (IEC 61672-2:2013); German version EN 61672-2:2013
- ICS
- 17.140.50
- CCS
- L31
- 发布
- 2014-07-01
- 实施
Electroacoustics - Sound level meters - Part 1: Specifications (IEC 61672-1:2013); German version EN 61672-1:2013
- ICS
- 17.140.50
- CCS
- L31
- 发布
- 2014-07-01
- 实施
Loudspeakers for sound system equipment
- ICS
- 33.160.50
- CCS
- L31
- 发布
- 2014-02-20
- 实施
Optical circuit boards. Basic test and measurement procedures. Optical transmission test for optical circuit boards without input/output fibres
- ICS
- 33.180.99
- CCS
- L31
- 发布
- 2013-09-30
- 实施
- 2013-09-30
Electroacoustics - Sound level meters - Part 1: Specifications
- ICS
- 17.140.50
- CCS
- L31
- 发布
- 2013-09
- 实施
Electroacoustics - Sound level meters - Part 3: Periodic tests
- ICS
- 17.140.50
- CCS
- L31
- 发布
- 2013-09
- 实施
This part of IEC 61672 provides details of the tests necessary to verify conformance to all mandatory specifications given in IEC 61672-1 for time-weighting sound level meters@ integrating-averaging sound level meters@ and integrating sound level meters. Patternevaluation tests apply for each channel of a multi-channel sound level meter@ as necessary. Tests and test methods are applicable to class 1 and class 2 sound level meters. The aim is to ensure that all laboratories use consistent methods to perform pattern-evaluation tests. NOTE 1 In this document@ references to IEC 61672-1@ IEC 61672-2@ and IEC 61672-3 refer to the second editions unless stated otherwise. NOTE 2 Procedures for the pattern-evaluation testing of sound level meters designed to conform to the specifications of IEC 61672-1:2002 were given in IEC 61672-2:2003.
Electroacoustics - Sound level meters - Part 2: Pattern evaluation tests
- ICS
- 17.140.50
- CCS
- L31
- 发布
- 2013-09
- 实施
- 2017-04-07
This part of IEC 62127 specifies relevant hydrophone characteristics. This standard 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.Part 3: Properties of hydrophones for ultrasonic fields up to 40 MHz
- ICS
- 17.140.50
- CCS
- L31
- 发布
- 2013-05
- 实施
Ultrasonics.Hydrophones.Part 3: Properties of hydrophones for ultrasonic fields up to 40 MHz
- ICS
- 17.140.50
- CCS
- L31
- 发布
- 2013-05
- 实施
- 2013-05-30
Measurement microphones - Part 8: Methods for determining the free-field sensitivity of working standard microphones by comparison (IEC 61094-8:2012); German version EN 61094-8:2012 + AC:2013
- ICS
- 17.140.50;33.160.50
- CCS
- L31
- 发布
- 2013-04
- 实施
Ultrasonics - Hydrophones - Part 2: Calibration for ultrasonic fields up to 40 MHz
- ICS
- 11.040.50;11.040.60;17.140.50
- CCS
- L31
- 发布
- 2013-02
- 实施
