HB 5429-1989 高丙烯腈丁腈胶和氟橡胶试验用胶片
作者:标准资料网 时间:2024-05-27 10:15:36 浏览:9482
来源:标准资料网
基本信息
| 标准名称： | 高丙烯腈丁腈胶和氟橡胶试验用胶片 |
| 中标分类： |
化工 >>
合成材料 >>
合成橡胶 |
| ICS分类： |
橡胶和塑料工业 >>
橡胶
|
| 发布日期： | 1989-05-13 |
| 实施日期： | 1989-12-01 |
| 首发日期： | 1900-01-01 |
| 作废日期： | 1900-01-01 |
| 出版日期： | 1900-01-01 |
| 页数： | 6页 |
适用范围
没有内容
前言
没有内容
目录
没有内容
引用标准
没有内容
所属分类： 化工 合成材料 合成橡胶 橡胶和塑料工业 橡胶
Product Code:SAE AMS5557
Title:Steel, Corrosion and Heat Resistant, Seamless or Welded Hydraulic Tubing, 18.5Cr - 10.5Ni - 0.40Ti (SAE 30321), Solution Heat Treated
Issuing Committee:Ams F Corrosion Heat Resistant Alloys Committee
Scope:This specification covers a corrosion and heat-resistant steel in the form of seamless or welded and drawn tubing.【英文标准名称】:Acoustics-Statisticaldistributionofhearingthresholdsasafunctionofage
【原文标准名称】:声学.听阈与年龄的关系的统计分布
【标准号】:BSENISO7029-2000
【标准状态】:现行
【国别】:英国
【发布日期】:2000-08-15
【实施或试行日期】:2000-08-15
【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】:声学;听觉阈;衰老;龄期;声学测量;统计分布;频率;音频;听力测定;中位数;听觉
【英文主题词】:Acoustics;Age;Audibility;Audiometry;Auditorythreshold;Definition;Definitions;Determination;Mathematicalcalculations;People;Statisticaldata;Statisticaldistribution;Statistics
【摘要】:ThisInternationalStandardprovidesdescriptivestatisticsofthehearingthresholdforpopulationsofvariousages.Itspecifiesthefollowing,fortherangeofaudiometricfrequenciesfrom125Hzto8000Hzandforpopulationsofotologicallynormalpersonsofagivenagewithintheagelimitsof18yearsto70yearsinclusive:a)theexpectedmedianvalueofhearingthresholdsgivenrelativetothemedianhearingthresholdattheageof18years;b)theexpectedstatisticaldistributionaboveandbelowthemedianvalue.Thedataareapplicableforestimatingtheamountofhearinglosscausedbyaspecificagentinapopulation.Suchacomparisonisvalidifthepopulationunderstudyconsistsofpersonswhoareotologicallynormalexceptfortheeffectofthespecificagent.NoiseexposureisanexampleofaspecificagentandforthisapplicationselecteddatafromthisInternationalStandardarereferredtoas"DataBaseA"inISO1999.Thedatamayalsobeusedtoassessanindividual'shearinginrelationtothedistributionofhearingthresholdswhichisnormalfortheperson'sagegroup.However,itisnotpossibletodetermineforanindividualpreciselywhichpartofanobservedhearinglossisattributabletoanaccumulationofdetrimentaleffectsonthehearingwhichincreasewithage,andwhichparthasbeencausedbyotherfactorssuchasnoise.Thehearingthresholddeviationasdefinedhereinandthehearingthresholdlevelasdefinedinotherstandards(ISO389-1,ISO8253-1,ISO8253-2,IEC60645-1)expressthehearingthresholdofanindividualoranindividualearrelativeto,respectively,a)themedianhearingthresholdofapopulationof18-year-oldpersons,orb)areferencezerolevelspecifiedinvariouspartsofISO389.Totheextentthatthereferencezerolevelrepresentsthemedianofthe18-year-oldpopulation,thevaluesofthetwotermswillbethesame.
【中国标准分类号】:A42
【国际标准分类号】:17_140_99
【页数】:18P;A4
【正文语种】:英语
