L31 电声器件 标准查询与下载

BS EN 60645-3:2007 电声学.听力测定设备.短时持续试验信号

This part of IEC 60645 specifies a means of describing the physical characteristics of audiometric reference and test signals of short duration and methods for their measurement. The object of this standard is to ensure that audiometric stimuli of short duration are specified and measured in the same way and that the calibration of equipment using such signals is carried out using defined methods. This standard does not describe the method of use of short duration test signals.

Electroacoustics - Audiometric equipment - Test signals of short duration

BS EN ISO 389-6:2007 声学.测听设备校准用基准零点.短时持续试验信号用参考扩音阀

This part of ISO 389 specifies reference hearing threshold levels for tests signals of short duration applicable to the calibration of audiometric equipment where such signals are used.

Acoustics - Reference zero for the calibration of audiometric equipment - Reference threshold of hearing for test signals of short duration

BS EN ISO 4869-3:2007 声学.听力保护器.用声学试验器具测量耳罩式保护器的插入损耗

This part of ISO 4869 specifies a method for measuring the insertion loss of ear-muff type hearing protectors using an acoustic test fixture. The method is applicable to the investigation of production spreads of performance as part of type approval or certification procedures, and to the investigation of the change of performance with age. It is intended to ensure that ear-muff hearing protector samples submitted for subjective testing of attenuation according to ISO 4869-1 have performances typical of the type. The method specified in this part of ISO 4869 is not applicable as the basic test for type approval. Performance data obtained by this method are not intended to be quoted as representing the real-ear sound attenuation of an ear-muff, nor the protection provided by the ear-muff. For the testing of certain ear-muffs (such as those attached to safety helmets, or those with contoured earcups or ear-cushions, or supra-aural ear-muffs), the procedure described in this part of ISO 4869 might need to be modified.

Acoustics - Hearing protectors - Measurement of insertion loss of ear-muff type protectors using an acoustic test fixture

IEC 62127-3:2007 超音波学.水听器.第3部分:超音波场小于40MHz用水听器的性能

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

IEC 62127-1:2007 超音波学.水听器.第1部分:医用超音波场小于40MHz的测量和特性

This part of IEC 62127 specifies methods of use of calibrated hydrophones for the measurement in liquids of acoustic fields generated by ultrasonic medical equipment operating in the frequency range up to 40 MHz.

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

DIN EN 60118-4:2007 电声学.助听器.第4部分:助听器用感应环路系统.磁场强度(IEC 60118-4-2006)

Electroacoustics - Hearing aids - Part 4: Induction loop systems for hearing aid purposes - Magnetic field strength (IEC 60118-4:2006); German version EN 60118-4:2006

IEC 62127-2:2007 超音波学.水听器.第2部分:超音波场小于40MHz的校准

This part of IEC 62127 specifies: • absolute hydrophone calibration methods; • relative (comparative) hydrophone calibration methods. Recommendations and references to accepted literature are made for the various relative and absolute calibration methods in the frequency range covered by this standard. This standard is applicable to • hydrophones used for measurements made in water and in the ultrasonic frequency range up to 40 MHz; NOTE 1 Although some physiotherapy medical applications of medical ultrasound are developing which operate in the frequency range 40 kHz to 100 kHz, the primary frequency range of diagnostic imaging remains above 2 MHz. It has recently been established that, even in the latter case, the hydrophone response at substantially lower frequencies can influence measurements made of key acoustic parameters [1]. • hydrophones employing circular piezoelectric sensor elements, designed to measure the pulsed wave and continuous wave ultrasonic fields generated by ultrasonic equipment; NOTE 2 Some hydrophones can have non-circular active elements, arising from slight deviations from a circular structure caused, for example by electrode structure, or conversely, the active elements can actually be squares. The clauses within this standard remain valid, although, in these cases, special attention should be paid to the directional response and to the effective radii of the active element through various axes of rotation. • hydrophones with or without a hydrophone pre-amplifier.

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

IEC 60268-5:2003/AMD1:2007 音响系统设备.第5部分:扬声器.修改件1

This standard is Sound system equipment - Part 5: Loudspeakers; Amendment 1.

Sound system equipment - Part 5: Loudspeakers; Amendment 1

ISO 4869-3:2007 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

This part of ISO 4869 specifies a method for measuring the insertion loss of ear-muff type hearing protectors using an acoustic test fixture. The method is applicable to the investigation of production spreads of performance as part of type approval or certification procedures, and to the investigation of the change of performance with age. It is intended to ensure that ear-muff hearing protector samples submitted for subjective testing of attenuation according to ISO 4869-1 have performances typical of the type. The method specified in this part of ISO 4869 is not applicable as the basic test for type approval. Performance data obtained by this method are not intended to be quoted as representing the real-ear sound attenuation of an ear-muff, nor the protection provided by the ear-muff. For the testing of certain ear-muffs (such as those attached to safety helmets, or those with contoured earcups or ear-cushions, or supra-aural ear-muffs), the procedure described in this part of ISO 4869 might need to be modified.

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

ISO 389-6:2007 声学.听力测量设备校准用参考零点.第6部分:短时持续听觉试验信号参考扩音阀

This part of ISO 389 specifies reference hearing threshold levels for tests signals of short duration applicable to the calibration of audiometric equipment where such signals are used.

Acoustics - Reference zero for the calibration of audiometric equipment - Part 6: Reference threshold of hearing for test signals of short duration

DIN EN 60318-5:2007 电声学.人头部和耳朵模拟器.第5部分:通过耳塞测量连接耳朵的助听器和耳机用2立方厘米耦合器

Electroacoustics - Simulators of human head and ear - Part 5: 2 cm<(hoch)3> coupler for the measurement of hearing aids and earphones coupled to the ear by means of ear inserts (IEC 60318-5:2006); German version EN 60318-5:2006

GJB 5935-2007 军用低速声码器接口通用要求

本标准规定了速率不大于 8kbit/s 的军用低速声码器（以下简称声码器）的功能接口和物理接口要求。 本标准适用于速率不大于 8kbit/s的声码器的论证、研制和生产。

General requirements for interface of low rate vocoder

NF C97-624:2007 电声学.助听器.第4部分:助听器用感应线圈系统.磁场强度

Electroacoustics - Hearing aids - Part 4 : induction loop systems for hearing aid purposes - Magnetic field strength.

DLA MIL-DTL-55535 A-2007 MK-1039/G头戴麦克风装置

This specification covers Headset-Microphone Kit MK-1039/G. This Headset-Microphone Kit is designed to fit both the regular and large size Combat Vehicle Crewman's Helmet. The electrical characteristics of the kit are ompatible with Tactical Radio Systems, such as the VRC-12. The impedance of the microphone circuit is 150 ohms, and the earphone elements are transformer matched and present a 500-ohm load to the earphone circuit.

HEADSET-MICROPHONE KIT MK-1039/G

BS EN 60565:2007 水下声学.水听器.0.01 Hz至1 MHz频率范围的校准

This International Standard specifies methods for calibration of hydrophones or reversible transducers when used as a hydrophone, particularly in the frequency range from 0,01 Hz to 1 MHz. Rules for the presentation of the calibration data are established.

Underwater acoustics - Hydrophones - Calibration in the frequency range 0,01 Hz to 1 MHz

BS EN 60118-4:2006 电声学.助听器.第4部分:助听器用感应回路系统.磁场强度

This international standard is applicable to audio-frequency induction loop systems producing an alternating magnetic field at audio frequencies and intended to provide an input signal for hearing aids operating with an induction pick-up coil. The standard specifies requirements for the field strength in audio-frequency induction loops for hearing aid purposes, which will give adequate signal-to-noise ratio without overloading the hearing aid. The standard also specifies the minimum frequency response requirements for acceptable intelligibility. Methods for measuring the magnetic field strength are specified, and information is given on appropriate measuring equipment (see Annex B), information that should be provided to the operator and users of the system (see Annex C), and other important considerations. The standard does not specify requirements for loop driver amplifiers or associated microphone or audio signal sources, or for the field strength produced by equipment, such as telephone handsets, within the scope of ITU-T P.370.

Electroacoustics - Hearing aids - Part 4: Induction loop systems for hearing aid purposes - Magnetic field strength

ASA S12.68-2007 在包括CD Rom听力保护器评估声压水平有效性方法

Methods of Estimating Effective A-Weighted Sound Pressure Levels When Hearing Protectors are Worn Includes CD Rom

Methods of Estimating Effective A-Weighted Sound Pressure Levels When Hearing Protectors are Worn

NF C97-618-5*NF EN 60318-5:2006 电声学.人头和耳模拟器.第5部分:用于测量耳塞式助听器和耳机的2cm³耦合器

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.

BS EN 60318-5:2006 电声学.人头和耳模拟器.耳塞式助听器和耳机测量用2立方厘米耦合器

This part of IEC 60318 describes an acoustic coupler for loading an earphone or hearing aid with a specified acoustic impedance when determining its physical performance characteristics, in the frequency range 125 Hz to 8 kHz. It is suitable for air conduction hearing aids and earphones, coupled to the ear by means of ear inserts e.g. ear moulds or similar devices. The sound pressure developed by an earphone is not, in general, the same in the coupler as in a person’s ear. However, it can be used as a simple and ready means for the exchange of specifications and of physical data on hearing aids and for the calibration of specified insert earphones used in audiometry.

Electroacoustics - Simulators of human head and ear - 2 cm3 coupler for the measurement of hearing aids and earphones coupled to the ear by means of ear inserts

IEC 60118-4:2006 电声学.助听器.第4部分:助听器的声频感应线圈.磁场强度

This international standard is applicable to audio-frequency induction loop systems producing an alternating magnetic field at audio frequencies and intended to provide an input signal for hearing aids operating with an induction pick-up coil. The standard specifies requirements for the field strength in audio-frequency induction loops for hearing aid purposes, which will give adequate signal-to-noise ratio without overloading the hearing aid. The standard also specifies the minimum frequency response requirements for acceptable intelligibility. Methods for measuring the magnetic field strength are specified, and information is given on appropriate measuring equipment (see Annex B), information that should be provided to the operator and users of the system (see Annex C), and other important considerations. The standard does not specify requirements for loop driver amplifiers or associated microphone or audio signal sources, or for the field strength produced by equipment, such as telephone handsets, within the scope of ITU-T P.370.

Electroacoustics - Hearing aids - Part 4: Induction loop systems for hearing aid purposes - Magnetic field strength