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BS 4847-1989 声录放设备速度波动的测量方法

作者:标准资料网 时间:2024-04-26 02:01:38  浏览:8723   来源:标准资料网
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【英文标准名称】:Methodofmeasurementofspeedfluctuationsinsoundrecordingandreproducingequipment
【原文标准名称】:声录放设备速度波动的测量方法
【标准号】:BS4847-1989
【标准状态】:现行
【国别】:英国
【发布日期】:1989-10-31
【实施或试行日期】:1989-10-31
【发布单位】:英国标准学会(BSI)
【起草单位】:BSI
【标准类型】:()
【标准水平】:()
【中文主题词】:录音;音频设备;公差(测量);放声;信号失真;道速;记录设备;电波测量;权函数;调频;性能试验;记录特性
【英文主题词】:Clay;Definition;Definitions;Electricalengineering;Electroacoustics;Films(cinema);Fluctuation;Magneticsoundrecording;Measurement;Measuringinstruments;Measuringtechniques;Peakvalues;Recording;Recordingengineering;Recordingequipment;Recordingmedia;Recordingsystems;Reproductingequipment;Soundquality;Soundrecording;Soundrecordingmedia;Soundreproduction;Soundtechniques;Specification(approval);Terminology;Velocity;Velocitymeasurement
【摘要】:Measurementofwowandflutterusingtheweightedpeaktechnique.
【中国标准分类号】:M71
【国际标准分类号】:33_160_30
【页数】:12P.;A4
【正文语种】:英语


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MIL-P-500H, MILITARY SPECIFICATION, PLATES, TENT, PEAK, AND RIDGE (18 OCT 1988)., This document covers six types of tent peak and ridge plates.MIL-PRF-83536B, PERFORMANCE SPECIFICATION, RELAYS, ELECTROMAGNETIC, ESTABLISHED RELIABILITY, 25 AMPERES AND BELOW, GENERAL SPECIFICATION FOR (15 APR 2003) [SUPERSEDING MIL-R-83536]., This specification covers the general requirements for electromagnetic, hermetically sealed relays for use in aircraft, missile, spacecraft, ship, and other primary vehicles or in ground support equipment (see 6.1). These relays are designed to operate over the full range from low level to power switching with contact ratings up to 25 amperes alternating current (ac) or direct current (dc). Specification sheets (see 3.1) specifying requirements for 25 ampere relays are for relays that have a maximum load rating of 25 amperes for resistive load only. All other load ratings (motor, inductive, lamp) are less than 25 amperes. The failure rate (FR) level is established at a confidence level of 90 percent for qualification and 60 percent for maintenance of qualification based on 100,000 cycles at +125?C under the rated load conditions specified herein. For application and caution information, see 6.1.

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