L31 电声器件 标准查询与下载

ITU-T P.57-1993 仿真耳朵-电话转换质量

This Recommendation specifies the Artificial Ears for telephonometric use. Three types are recommended, covering the different transducers, types, sizes and technologies.

Artificial Ears - Telephone Transmission Quality - Objective Measuring Apparatus - Corrigendum 1 (Study Group XII) 16 pp

ITU-T P.58-1993 通话计时用人头和躯干模拟器

The ITU Telecommunication Standardization Sector (ITU-T) is a permanent organ of the International Telecommunication Union. The ITU-T is responsible for studying technical, operating and tariff questions and issuing Recommendations on them with a view to

(WITHDRAWN) Head and Torso Simulator for Telephonometry - Telephone Transmission Quality Objective Measuring Apparatus (Study Group XII) 28 pp

IEC 60118-2:1983/AMD1:1993 助听器 第2部分:自动增益控制电路的助听器 修改1

Adds 4 standards quoted, new definitions 4.8 (AGC activated frequency response) and 4.9 (Operating frequency range of the AGC), a new clause 9 (AGC activated frequency response of hearing aids with a single channel AGC circuit in operation using pure ton

Hearing aids; part 2: hearing aids with automatic gain control circuits; amendment 1

DIN IEC 60118-5:1992 助听器.塞入式耳机塞头

The document defines those dimensions which are essential in order to ensure interchangeability of insert earphones as used with earmoulds or other attachments to the ear.

Hearing aids; part 5: nipples for insert earphones (IEC 60118-5:1983); german version HD 450.5 S1:1985

prEN 60118-0 prA1-1992 助听器.第0部分:电声特性的测量.修改件1

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

prEN 60118-7-1992 助听器.第7部分:交货质量检验用助听器特性的测量(IEC 118-7-83)

Hearing aids; part 7: measurement of performance characteristics of hearing aids for quality inspection for delivery purposes (IEC 118-7:1983)

prEN 60118-7 prA1-1992 助听器.第7部分:交货质量检验用助听器特性的测量.修改件1

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

prEN 60118-0-1992 助听器.第0部分:电声特性的测量(IEC 118-0-83)

Hearing aids; part 0: measurement of electroacoustical characteristics (IEC 118-0:1983)

DIN V 45608:1992 空气传导助听器声学测量用临时头部模拟器和躯干模拟器

This preliminary standard describes a head and torso simulator for hearing aid measurements. The device is intend for airbone acoustic measurements, and is not suitable for measurements which depend on vibration conduction path such as bone conduction. The head and torso simulator has been designed to provide diffraction similar to that encountered around the median human head and torso, and as such may be useful for other acoustical measurements. At present it has, however, only been validated for hearing aids, and other applications will require additional validatory studies. Some such studies have already shown that the head and torso simulator may not be suitable for the calibration of external earphones due to poor repeatability of their positioning; errors may exceed 10 dB.#,,#

Provisional head and torso simulator for acoustic measurements on air conduction hearing aids; identical with IEC 60959:1990

ASA S3.42-1992 宽频带噪声信号测试助听器

The distribution of amplituted and phase of the components of a signal as a function of frequency.

Testing Hearing Aids with a Broad-Band Noise Signal

ANSI S3.42-1992 助听器的宽带噪音信号测试

The purpose of this document is to define a test method with which to characterize the steady-state frequency response and input/output characteristics of hearing aids as the input level varies. This method is particularly useful for those hearing aids t

Testing Hearing Aids with a Broad-Band Noise Signal

ANSI/ASA S3.42-1-1992 带宽带噪声信号的助听器检测

The purpose of this document is to define a test method with which to characterize the steady-state frequency response and input/output characteristics of hearing aids as the input level varies. This method is particularly useful for those hearing aids that have automatic gain control or other types of adaptive circuitry.

Testing Hearing Aids with a Broad-Band Noise Signal

BS 6083-3:1991 助听器.第3部分:不完全由听者佩戴的助听设备电声特性测量方法

Describes methods of determining the overall performance and also the measurement of certain parameters including frequency response, air to air gain, acoustic output, internal noise etc.

Hearing aids - Methods for measurement of electroacoustical characteristics of hearing aid equipment not entirely worn on the listener

BS EN 61012:1991 伴有超声情况下可听到声音测量用滤波器

Specifies the electrical characteristics of a U-weighting filter , mainly for use with sound level meters.

Filters for the measurement of audible sound in the presence of ultrasound

IEC TR 60959:1990 空气传导助听器声学测量用临时头戴筒式模拟器

Describes a simulator which reproduces approximately the acoustical effects of a median human adult, including diffraction affecting the performance of a hearing aid on a person. The device consists of a head mounted on a torso that extends to the waist.

Provisional head and torso simulator for acoustic measurements on air conduction hearing aids

DIN 45605:1989 助听器.声学特性的数字表示法

Hearing aids; numerical expression of acoustical performance characteristics

ASA S3.25-1989 闭塞听力模拟器

1.1 Ear simulators are intended for earphone response determination, measurement of hearing aid gain and performance, and measurements requiring simulation of the sound transmission characteristics of an external ear. They provide data equivalent to sound pressures at the eardrum generated by various sources in and around the ear. A schematic or conceptual representation of a complete ear simulator is given in Fig. 1. 1.2 The occluded ear simulator described in this standard is that portion below the line X-X’ in the schematic representation of a conceptual ear simulator in Fig. 1. 1.3 This standard gives physical performance criteria for a mechanical structure that provides acoustic impedance and exhibits sound-pressure distributions approximating those found in a median adult human ear between an earmold and the eardrum. It also describes a specific device whose performance conforms to these criteria. 1.4 As a simulation of part of a median adult human ear, the occluded ear simulator is suitable for use in calibration systems such as manikins, where the complete ear is to be simulated. 1.5 Procedures are outlined for determining that the occluded ear simulator has the acoustic performance specified in this standard. 1.6 Appendix A presents an acoustsic performance comparison of the ANSI occluded ear simulator with the IEC 71 1 ( 1982) occluded ear simulator.

Occluded Ear Simulator

BS 6083-10:1988 助听器 助听器标准指南

Details all appropriate IEC publications related to hearing aids and indicates particular measurement requirements.

Hearing aids. Guide to hearing aid standards

ITU-T P.75-1988 对装有碳粒送话器的手柄话机的标准检验方法

Since the characteristics of carbon microphones are strongly dependent on conditioning techniques,it is necessary to follow a consistent procedure prior to measuring sensitivity frequency characteristics in order to obtain reproducible results.The CCITT recommends that for best reproducibility, automatic mechanical conditioning be used.

STANDARD CONDITIONING METHOD FOR HANDSETS WITH CARBON MICROPHONES

ITU-T P.61-1988 电容传声器的校准方法

The sending, receiving or sidetone sensitivity/frequency characteristic of a local telephone system (LTS) is usually measured directly.

METHODS FOR THE CALIBRATION OF CONDENSER MICROPHONES