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
Lightweight Headset and Boom Microphone 1956
Lightweight Headset and Boom Microphone 1956
- ICS
- 33.160.50
- CCS
- L31
- 发布
- 1972-03-03
- 实施
Lightweight Headset and Boom Microphone, 1956
Lightweight Headset and Boom Microphone 1956
- ICS
- 33.160.50
- CCS
- L31
- 发布
- 1972-03-03
- 实施
Electric hearing aids; connecting cords for earphones
- ICS
- 2462
- CCS
- L31
- 发布
- 1957-07
- 实施
本标准规定一种阻塞耳道腔模拟器，用以校准耳塞机在100～10000Hz频率范围内人耳鼓膜处的声压。 设计本模拟器也为日后进一步模拟完整耳道供校准用的敞模器件或类似器件打下基础。此类模拟器件的文件正在考虑中。 本标准引用了SJ/Z 9144-87(IEC 126号)标准：测量助听器耳塞机用IEC参考耦合腔。
Occluded-ear simulator for the measurement of earphones coupled to the ear by ear inserts
- ICS
- 33.120
- CCS
- L31
- 发布
- 实施
本建议书的目的是描述一个具有特定声阻抗的承放耳机用的耦合腔，它可以在200～5000Hz的频率范围内，测定助听器用气导耳机的物理特性，该耳机是靠耳塞如耳模或类似的器件耦合到人耳。此耦合腔是较早的2cm^(3)耦合腔的发展。 但用这种耦合腔并不给出助听器在每个人身上所获得的实际性能。然而，IEC推荐它用来作为交换助听器的特性和物理数据的一种简便方法。
IEC reference coupler for measurement of hearing aids earphones
- ICS
- 11.180
- CCS
- L31
- 发布
- 实施
为保证与外部电信号或电声信号源的兼容性，本标准对个人助听器的外部电输入规定了电特性、标志特性和安全特性。 按完整系统设计时，本标准不包括cros(对侧信号发送)或Bi-cros(双对侧信号发送)助听器各部件的互连。 本标准中，所有声压级(缩写为SPL)均以20μPa为基准。
Hearing aids Part 6 Characteristics of input circuits for hearing aids
- ICS
- 11.180
- CCS
- L31
- 发布
- 实施
Quality grading standard for electret microphones
- ICS
- 31.020
- CCS
- L31
- 发布
- 实施
本标准规定了扬声器纸盆双头捞浆机的完好要求和检查、评定方法。 本标准适用于YDT 1623以下(包括YDT 1623)和YD 165以下(包括165)的扬声器纸盆双头捞浆机。
Requirements of readiness and methods of inspection and assessment for double head loudspeaker cone pulp dredging machines
- ICS
- 33.120
- CCS
- L31
- 发布
- 实施
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
- ICS
- 13.340.20
- CCS
- L31
- 发布
- 实施
- 0000-00-00
Measurement of the performance of hearing aids for quality inspection for delivery purposes
- ICS
- 11.180
- CCS
- L31
- 发布
- 实施
本规范规定了军用头戴式送受话器组、受话器组和抗噪声耳罩的技术要求及质量保证。 本标准适用于陆、海、空三军有线、无线通信用头戴式抗噪声送受话器组、受话器组和耳罩。本规范中所指的"产品"分别是指头戴式送受话器组、受话器组和耳罩。
General specifications for anti-noise head set, receiver set and earpieces
- ICS
- 33.120
- CCS
- L31
- 发布
- 实施
Symbols and other markings on hearing aids and related equipment
- ICS
- 11.180
- CCS
- L31
- 发布
- 实施
本标准规定了采用骨振器输出的助听器的特性测量方法。
Hearing aids Part 9 Methods for measurement of characteristics of hearing aids with bone vibrator output
- ICS
- 11.180
- CCS
- L31
- 发布
- 实施
