L31 电声器件 标准查询与下载

ASTM E1774-96(2007) 电磁声学传感器用标准指南

1.1 This guide is intended primarily for tutorial purposes. It provides an overview of the general principles governing the operation and use of electromagnetic acoustic transducers (EMATs) for ultrasonic examination.1.2 This guide describes a non-contact technique for coupling ultrasonic energy into an electrically conductive or ferromagnetic material, or both, through the use of electromagnetic fields. This guide describes the theory of operation and basic design considerations as well as the advantages and limitations of the technique.1.3 This guide is intended to serve as a general reference to assist in determining the usefulness of EMATs for a given application as well as provide fundamental information regarding their design and operation. This guide provides guidance for the generation of longitudinal, shear, Rayleigh, and Lamb wave modes using EMATs.1.4 This guide does not contain detailed procedures for the use of EMATs in any specific applications; nor does it promote the use of EMATs without thorough testing prior to their use for examination purposes. Some applications in which EMATs have been applied successfully are outlined in Section 9.This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

Standard Guide for Electromagnetic Acoustic Transducers (EMATs)

ASTM E1774-96 电磁声学传感器用标准指南

1.1 This guide is intended primarily for tutorial purposes. It provides an overview of the general principles governing the operation and use of electromagnetic acoustic transducers (EMATs) for ultrasonic examination.1.2 This guide describes a non-contact technique for coupling ultrasonic energy into an electrically conductive or ferromagnetic material, or both, through the use of electromagnetic fields. This guide describes the theory of operation and basic design considerations as well as the advantages and limitations of the technique.1.3 This guide is intended to serve as a general reference to assist in determining the usefulness of EMATs for a given application as well as provide fundamental information regarding their design and operation. This guide provides guidance for the generation of longitudinal, shear, Rayleigh, and Lamb wave modes using EMATs.1.4 This guide does not contain detailed procedures for the use of EMATs in any specific applications; nor does it promote the use of EMATs without thorough testing prior to their use for examination purposes. Some applications in which EMATs have been applied successfully are outlined in Section 9.1.5 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

Standard Guide for Electromagnetic Acoustic Transducers (EMATs)

ANSI S3.22-1996 助听器特性的规范

Describes air-conduction hearing aid measurement methods that are particularly suitable for specification and tolerance purposes.

Specification of hearing aid characteristics

IEC TR3 60268-18:1995 声系统设备 第18部分:峰值节目电平表 数字型声音峰值电平表

Describes a digital audio peak level indicator for professional and consumer use to indicate the peak levels of sampled and quantized audio signals. It establishes a basic plan for standards development concerning the characteristics to be specified and

Sound system equipment - Part 18: Peak programme level meters - Digital audio peak level meter

UL 1971-1995 听力障碍者用信号装置

Signaling devices for the hearing impaired

BS EN 60118-1:1995 助听器.有感应线圈输入助听器

Describes a method of determining electroacoustic performance of hearing aids fitted with an induction pick-up coil and used in an audio-frequency magnetic field.

Hearing aids - Hearing aids with induction pick-up coil input

NF C97-621:1995 助听器.第1部分:感应拾音线圈输入的助听器

Hearing aids. Part 1 : hearing aids with induction pick-up coil input.

IEC 60118-1:1995 助听器.第1部分:感应拾音线圈输入的助听器

Cancels and replaces the second edition (1983). Describes a method of determining the electroacoustic performance of hearing aids fitted with an induction pick-up coil and used in an audiofrequency magnetic field. Not intended to be used for the measurem

Hearing aids - Part 1: Hearing aids with induction pick-up coil input

ANSI/ASA S3.7-1995 耳机耦合器校准方法

The physical configuration and acoustical performance of couplers for calibration of supra-aural and insert earphones are specified. The standard which is a revision of S3.7-1973, describes a family of 6.0 cm3 and 2.0 cm3 couplers, and provides information on the methods for coupler calibration of the respective supra-aural and insert earphones.

Method for Coupler Calibration of Earphones

SJ 20434-1994 通信电声器件与设备的机械接口

Mechenical interface between communication electro－acoustic device and equipment

SJ 20429-1994 通信电声器件与设备互连的优选配接值

The prefered matching values between communication electo-acoustic device and equipment

SJ 20410-1994 军用电声器件型号命名方法

Type designation system for of military electroacoustic devices

JIS C 5532:1994 音响系统设备用扬声器

この規格は，完全な受動素子として扱われる音響システム用スピーカに適用する。

Loudspeakers for sound system equipment

DIN EN 60118-0:1994 助听器.第0部分:电声特性测量

Hearing aids; part 0: measurement of electroacoustical characteristics (IEC 60118-0:1983 + IEC 118-0 AMD 1:1994); German version EN 60118-0:1993 + A1:1994

NF C97-332:1994 扩音器的测量.第2部分:用可逆技术对实验室标准扩音器进行压力校正的基本方法

Measurement microphones. Part 2 : primary method for pressure calibration of laboratory standard microphones by the reciprocity technique.

IEC 60118-0:1983/AMD1:1994 助听器 第0部分:电声特性的测量 修改1

Amends subclauses 3.3 and 5.4.6, replaces subclause 4.17.

Hearing aids; part 0: measurement of electroacoustical characteristics; amendment 1

IEC 60118-7/AMD1:1994 助听器 第7部分:助听器交货检验时的性能测量 修改1

Hearing aids; part 7: measurement of the performance characteristics of hearing aids for quality inspection for delivery purposes; amendment 1

NF C97-620:1993 助听器.第0部分:电声特性的测量

Hearing aids. Part 0 : measurement of electroacoustical characteristics.

NF C97-627:1993 助听器.第7部分:助听器交货质量检测的性能特点测试

Hearing aids - Part 7 : measurement of performance characteristics of hearing aids for quality inspection for delivery purposes.

ITU-T P.59-1993 仿真会话语声

The signal described here reproduces the on-off temporal characteristics of human conversational speech for characterizing speech processing systems which have speech detectors, such as loudspeaker telephones, echo control devices, digital circuit multipl

ARTIFICIAL CONVERSATIONAL SPEECH