DIN ISO 4869-1-1991 声学.听力保护器.第1部分:声衰减的主观测量法
时间:2024-05-14 14:14:30 来源: 标准资料网 作者：标准资料网 阅读：8886
【英文标准名称】:Acoustics;hearingprotectors;subjectivemethodforthemeasurementofsoundattenuation;identicalwithISO4869-1:1990
【原文标准名称】:声学.听力保护器.第1部分:声衰减的主观测量法
【标准号】:DINISO4869-1-1991
【标准状态】:现行
【国别】:德国
【发布日期】:1991-10
【实施或试行日期】:
【发布单位】:德国标准化学会(DE-DIN)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:护耳器;声学;噪声测量;测量设备;失支听觉;听度阈测量;方法;听度;耳机上的橡皮护套;声学测量;安全装置;振动工程;定义;噪声控制;耳塞;衰减;测量;听力测试;隔音;试验;电气工程;听觉阈
【英文主题词】:Acousticmeasurement;Acoustics;Attenuation;Audiobility;Auditorythreshold;Definition;Definitions;Earmuffs;Earplugs;Earprotectors;Electricalengineering;Listeningtests;Lossofhearing;Measurement;Measurementsofthresholdofaudibility;Measuringequipment;Methods;Methodsformeasuring;Noiseabatement;Noisecontrol;Noisemeasurements;Safetydevices;Soundinsulation;Testing;Vibrationengineering
【摘要】:
【中国标准分类号】:C71
【国际标准分类号】:13_340_20
【页数】:8P.;A4
【正文语种】:德语
【英文标准名称】:Structuraltimber-Strengthclasses-Assignmentofvisualgradesandspecies
【原文标准名称】:建筑用木材.强度等级.目视等级和样品的分配
【标准号】:BSEN1912-1998
【标准状态】:作废
【国别】:英国
【发布日期】:1998-12-15
【实施或试行日期】:1998-12-15
【发布单位】:英国标准学会(GB-BSI)
【起草单位】:BSI
【标准类型】:()
【标准水平】:()
【中文主题词】:外观检查(试验);松柏目;木材;种鉴定;建筑用木料;地理和政治区域;材料强度;软木;白杨木;国家标准;分类系统;施工材料;等级(质量);硬木
【英文主题词】:Bulkdensity;Classification;Classificationsystems;Classifications;Construction;Constructionmaterials;Definition;Definitions;Hardwoods;Softwoods;Solidwood;Sortingclasses;Strengthclass;Strengthofmaterials;Structuraltimber;Testing;Timberconstruction;Visual;Wood
【摘要】:
【中国标准分类号】:B70
【国际标准分类号】:79_040
【页数】:14P.;A4
【正文语种】:英语
Product Code:SAE AIR1780
Title:Aircraft Flotation Analysis
Issuing Committee:A-5 Aerospace Landing Gear Systems Committee
Scope: This document is divided into five parts. The first part deals with flotation analysis features and definitions to acquaint the engineer with elements common to the various methods and the meanings of the terms used. The second part identifies and describes the various methods used. To accomplish the minimum intent of this document, techniques could be limited to those needed for flotation analysis only; however, because of the close relation between flotation analysis and runway design, methods for the latter are also included. In fact, runway design criteria are used for flotation and evaluation in some cases, and are periodically the governing procedure in specific, if isolated, instances. From time to time, it may be necessary to deal with runways built to obsolete criteria. Therefore, a listing of most of these constitutes the third part. The fourth part of this document tabulates the recommended documents, categorizing them for commercial and civil versus military usage, by military service to be satisfied, and by type of pavement. The document concludes with brief elaborations of some concepts for broadening the analyst's understanding of the subject.