L31 电声器件 标准查询与下载

IEC 62489-1:2010 电声学.助听用音频电磁感应环路系统.第1部分:系统组件性能的具体说明及测量方法

This part of the IEC 62489 series applies to the components of audio-frequency inductionloop systems for assisted hearing. It may also be applied to such systems used for other purposes@ as far as it is applicable. This standard is intended to encourage accurate and uniform presentation of manufacturers' specifications@ which can be verified by standardized methods of measurement. It is intended for type testing. The components considered are the following: ?C amplifiers; ?C microphones; ?C other components@ such as playback equipment. This standard does not deal with safety@ for which IEC 60065 applies. It also does not deal with EMC (Electromagnetic compatibility) and EMF (Electromagnetic fields@ in the context of human exposure).

Electroacoustics - Audio-frequency induction loop systems for assisted hearing - Part 1: Methods of measuring and specifying the performance of system components

ANSI/ASA S3.35-2010 模拟真耳工作环境下的助听器性能特性的测量方法

This standard describes methods to measure the acoustical effects of a simulated median adult wearer on the performance of a hearing aid using: direct simulated real-ear aided measurements (sound pressure developed by a hearing aid in an ear simulator for a given free-field input sound pressure), and insertion measurements (the difference between the sound pressures developed in the ear simulator with and without a hearing aid in place). These test methods are not intended for quality control.

Method of Measurement of Performance Characteristics of Hearing Aids Under Simulated Real-Ear Working Conditions

ASTM E976-10 声发射传感器响应再现性测定的标准指南

Acoustic emission data is affected by several characteristics of the instrumentation. The most obvious of these is the system sensitivity. Of all the parameters and components contributing to the sensitivity, the acoustic emission sensor is the one most subject to variation. This variation can be a result of damage or aging, or there can be variations between nominally identical sensors. To detect such variations, it is desirable to have a method for measuring the response of a sensor to an acoustic wave. Specific purposes for checking sensors include: (1) checking the stability of its response with time; (2) checking the sensor for possible damage after accident or abuse; (3) comparing a number of sensors for use in a multichannel system to ensure that their responses are adequately matched; and (4) checking the response after thermal cycling or exposure to a hostile environment. It is very important that the sensor characteristics be always measured with the same sensor cable length and impedance as well as the same preamplifier or equivalent. This guide presents several procedures for measuring sensor response. Some of these procedures require a minimum of special equipment. It is not the intent of this guide to evaluate AE system performance. Refer to Practice E750 for characterizing acoustic instrumentation and refer to Guide E2374 for AE system performance verification. The procedures given in this guide are designed to measure the response of an acoustic emission sensor to an arbitrary but repeatable acoustic wave. These procedures in no way constitute a calibration of the sensor. The absolute calibration of a sensor requires a complete knowledge of the characteristics of the acoustic wave exciting the sensor or a previously calibrated reference sensor. In either case, such a calibration is beyond the scope of this guide. The fundamental requirement for comparing sensor responses is a source of repeatable acoustic waves. The characteristics of the wave do not need to be known as long as the wave can be reproduced at will. The sources and geometries given in this guide will produce primarily compressional waves. While the sensors will respond differently to different types of waves, changes in the response to one type of wave will imply changes in the responses to other types of waves. These procedures use a test block or rod. Such a device provides a convenient mounting surface for the sensor and when appropriately marked, can ensure that the source and the sensor are always positioned identically with respect to each other. The device or rod also provides mechanical loading of the sensor similar to that experienced in actual use. Care must be taken when using these devices to minimize resonances so that the characteristics of the sensor are not masked by these resonances. These procedures allow comparison of responses only on the same test setup. No attempt should be made to compare responses on different test setups, whether in the same or separate laboratories.1.1 This guide defines simple economical procedures for testing or comparing the performance of acoustic emission sensors. These procedures allow the user to check for degradation of a sensor or to select sets of sensors with nearly identical performances. The procedures are not capable of providing an absolute calibration of the sensor nor do they assure transferability of data sets between organizations. 1.2 Units8212;The values stated in SI units are to be regarded as standard. No other units of measurement are inclu......

Standard Guide for Determining the Reproducibility of Acoustic Emission Sensor Response

ASTM E2075/E2075M-10 丙烯酸棒测定声发射传感器响应一致性的标准实施规程

Degradation in sensor performance can occur due to dropping, mechanical shock while mounted on the test structure, temperature cycles, and so forth. It is necessary and desirable to have a simple measurement procedure that will check the consistency of sensor response, while holding all other variables constant. While test blocks of many different kinds have been used for this purpose for many years, an acrylic polymer rod offers the best all-around combination of suitable acoustic properties, practical convenience, ease of procurement and low cost. Because the acoustic properties of the acrylic rod are known to depend on temperature, this practice requires that the rod, sensors, and couplant be stabilized at the same working temperature, prior to verifying the sensors. Attention should be paid to storage conditions for the acrylic polymer rod. For example, it should not be left in a freezing or hot environment overnight, unless it is given time for temperature stabilization before use. Properly applied and with proper record keeping, this practice can be used in many ways. The user organization must determine the context for its use, the acceptance standards and the actions to be taken based on the lead break results. The following uses are suggested: To determine when a sensor is no longer suitable for use. To check sensors that have been exposed to high-risk conditions, such as dropping, overheating, and so forth. To get an early warning of sensor degradation over time. This can lead to identifying conditions of use, which are damaging sensors, and thus, to better equipment care and lower replacement costs. To obtain matched sets of sensors, preamplifiers, instrumentation channels, or a combination thereof, for more uniform performance of the total system. To save time and money, by eliminating the installation of bad sensors. To verify sensors quickly but consistently in the field and to assist trouble-shooting when a channel does not pass a performance check. All the above uses are recommended for consideration. The purpose of this practice is not to call out how these uses are to be implemented, but only to state how the test itself is to be performed so that the results obtained will be accurate and reliable.1.1 This practice is used for routinely checking the sensitivity of acoustic emission (AE) sensors. It is intended to provide a reliable, precisely specified way of comparing a set of sensors, or telling whether an individual sensor''s sensitivity has degraded during its service life, or both. 1.2 This practice is not a “calibration” nor does it give frequency response information. 1.3 Units8212;The values stated in SI units or inch-pound units are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the standard. 1.4 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 Practice for Verifying the Consistency of AE-Sensor Response Using an Acrylic Rod

SANS 61260:2009 电声学．倍频程和分数倍频程滤波器

Provides performance requirements and methods for testing the performance of analogue, sampled-data, and digital implementations of bandpass filters that comprise a filter set or spectrum analyser.

Electro-acoustics - Octave-band and fractional-octave-band filters

IEC 60318-1:2009 电声学.人的头部和耳朵模拟.第1部分:测量超听觉和耳罩耳机的耳朵模拟器

This International Standard relates to the specification of an ear simulator which covers the frequency band 20 Hz to 10 000 Hz and is intended for calibrating supra-aural earphones used in audiometry and telephonometry applied to the ear without acoustical leakage. NOTE ?C This device is not intended for the calibration of circumaural earphones. However@ IEC 60318-2 specifies an adaptor for use with this ear simulator to provide an interim acoustic coupler for the calibration of a circumaural audiometric earphone.

Electroacoustics - Simulators of human head and ear - Part 1: Ear simulator for the measurement of supra-aural and circumaural earphones

BS EN 61094-2:2009 电声学.测试传声器.第2部分:互易技术对实验室标准传声器进行压力校准的基本方法

This part of International Standard IEC 61094 – is applicable to laboratory standard microphones meeting the requirements of IEC 61094-1 and other types of condenser microphone having the same mechanical dimensions; – specifies a primary method of determining the complex pressure sensitivity so as to establish a reproducible and accurate basis for the measurement of sound pressure. All quantities are expressed in SI units.

Electroacoustics — Measurement microphones — Part 2: Primary method for pressure calibration of laboratory standard microphones by the reciprocity technique

GJB 2600A-2009 声表面波器件通用规范

本规范规定了声表面波(SAW)器件(带或不带无源阻抗匹配元件)的通用要求。 本规范包括三个质量等级: S级(空间用高可靠器件)、B级(军用高可靠性器件)、C级(普通军用器件)。 本规范适用于电子设备中应用的带通滤波器、谐振器、延迟线、滤波器组及色散延迟线(色散滤波器)等声表面波器件(以下简称器件)。

General specification for surface acoustic wave devices

DIN EN 62127-1 Berichtigung 1:2009 超音波学.水听器.第1部分:医疗超声波场小于40MHz的测量和特性.技术勘误DIN EN 62127-1-2008

Ultrasonics - Hydrophones - Part 1: Measurement and characterization of medical ultrasonic fields up to 40 MHz (IEC 62127-1:2007); German version EN 62127-1:2007, Corrigendum to DIN EN 62127-1:2008-06

DIN EN 62127-2 Berichtigung 1:2009 超音波学.水听器.第2部分:超音波场小于40MHz的校准.技术勘误DIN EN 62127-2-2008

Ultrasonics - Hydrophones - Part 2: Calibration for ultrasonic fields up to 40 MHz (IEC 62127-2:2007); German version EN 62127-2:2007, Corrigendum to DIN EN 62127-2:2008-06

DIN EN 60318-6:2009 电声学.人类头部和耳朵的模拟器.第6部分:骨传导振动器的测量用机械耦合器

Electroacoustics - Simulators of human head and ear - Part 6: Mechanical coupler for the measurements on bone vibrators (IEC 60318-6:2007); German version EN 60318-6:2008

ANSI/ASA S3.25-2009 塞耳模拟器

This standard gives acoustical performance criteria for a device that provides acoustic impedance and exhibits sound-pressure distributions approximating the median adult human ear between an earmold and the eardrum. Two specific embodiments whose performance conforms to these criteria are described. As a simulation of part of a median adult human ear, the occluded ear simulator is suitable for use in test systems such as manikins, where the complete ear is to be simulated.

Occluded Ear Simulator

ANSI/ASA S3.22a-2009 助听器特性的规范

Describes air-conduction hearing-aid measurement methods that are particularly suitable for specification & tolerance purposes. Test methods described are output sound pressure level (SPL) with 90-dB input SPL, full-on gain, frequency response, harmonic distortion, equivalent input noise, current drain & induction-coil sensitivity. Specific configurations are given for measuring input SPL to hearing aid. Allowable tolerances in relation to values specified by the mfr are given for certain parameters.

Specification of Hearing Aid Characteristics

NF S31-062-3*NF EN ISO 4869-3:2008 声学.听力保护器.第3部分:用声学试验器具测量耳罩式保护器的插入损耗

Acoustics - Hearing protectors - Part 3 : measurement of insertion loss of ear-muff type protectors using an acoustic test fixture.

IEC 29/664/CD:2008 IEC/CD/TS 60318-7:电声学.人类头部和耳朵的模拟器.第7部分:空气传导听力辅助设备的声音测量用头部和躯干模拟器

IEC/CD/TS 60318-7: Electroacoustics - Simulators of human head and ear - Part 7: Head and torso simulator for acoustic measurements of air-conduction hearing aids

BS EN 60318-6:2008 电声学.人头和人耳模拟器.骨振器的测量用机械耦合器

This part of IEC 60318 describes a mechanical coupler for the measurement of the output force of bone vibrators. The mechanical impedance of the coupler is specified in the frequency range 125 Hz to 8 000 Hz. The coupler is intended for calibration of audiometers using bone vibrators having a plane circular tip area of 175 mm² ± 25 mm² and for determining the performance of bone conduction hearing aids. The vibratory force developed by a bone vibrator is not, in general, the same on the coupler as on a person’s mastoid. However, the IEC recommends its use as a means for the calibration of specified vibrators used in audiometry and for the exchange of specifications and of data on bone conduction hearing aids. NOTE Some bone vibrators of hearing aids and some non-standardised bone vibrators still used in audiometry have a curved surface. Users should be aware that those vibrators in general will not be loaded on the mechanical coupler with the same mechanical impedance as the one specified in Table 1 of this standard.

Electroacoustics - Simulators of human head and ear -Part 6: Mechanical coupler for the measurement of bone vibrators

IEC 62127-1:2007/COR1:2008 超音波学.水听器.第1部分:频率小于40 MHz的医疗超声波场的测量和特性.技术勘误1

Ultrasonics - Hydrophones - Part 1: Measurement and characterization of medical ultrasonic fields up to 40 MHz; Corrigendum 1

Ultrasonics - Hydrophones - Part 1: Measurement and characterization of medical ultrasonic fields up to 40 MHz; Corrigendum 1

IEC 62127-2:2007/COR1:2008 超声波学.水听器.第2部分:频率小于40 MHz的超声波场的校准.技术勘误1

Ultrasonics - Hydrophones - Part 2: Calibration for ultrasonic fields up to 40 MHz; Corrigendum 1

Ultrasonics - Hydrophones - Part 2: Calibration for ultrasonic fields up to 40 MHz; Corrigendum 1

SANS 50352-3:2008 听力保护器.安全要求和测试.第3部分:工业用安全头盔上附着的耳罩

Specifies constructional, design and performance requirements, test methods, marking requirements and user information for ear muffs when fitted to an industrial safety helmet. Requires information to be made available concerning the sound characteristi

Hearing protectors - Safety requirements and testing Part 3: Ear-muffs attached to an industrial safety helmet

SANS 1451-3:2008 听力保护器.第3部分:附着于工业安全头盔上的耳罩

Specifies constructional, design and performance requirements for ear-muffs intended for use as hearing protectors and that are attached to industrial safety helmets. Real-ear attenuation characteristics of the ear-muffs/safety helmet combination are mea

Hearing protectors Part 3: Ear-muffs attached to an industrial safety helmet