欢迎来到麦多课文档分享! | 帮助中心 海量文档,免费浏览,给你所需,享你所想!
麦多课文档分享
全部分类
  • 标准规范>
  • 教学课件>
  • 考试资料>
  • 办公文档>
  • 学术论文>
  • 行业资料>
  • 易语言源码>
  • ImageVerifierCode 换一换
    首页 麦多课文档分享 > 资源分类 > PDF文档下载
    分享到微信 分享到微博 分享到QQ空间

    ISO TR 25417-2007 Acoustics - Definitions of basic quantities and terms《声学 基本参量的定义和术语》.pdf

    • 资源ID:1257873       资源大小:329.34KB        全文页数:18页
    • 资源格式: PDF        下载积分:10000积分
    快捷下载 游客一键下载
    账号登录下载
    微信登录下载
    二维码
    微信扫一扫登录
    下载资源需要10000积分(如需开发票,请勿充值!)
    邮箱/手机:
    温馨提示:
    如需开发票,请勿充值!快捷下载时,用户名和密码都是您填写的邮箱或者手机号,方便查询和重复下载(系统自动生成)。
    如需开发票,请勿充值!如填写123,账号就是123,密码也是123。
    支付方式: 支付宝扫码支付    微信扫码支付   
    验证码:   换一换

    加入VIP,交流精品资源
     
    账号:
    密码:
    验证码:   换一换
      忘记密码?
        
    友情提示
    2、PDF文件下载后,可能会被浏览器默认打开,此种情况可以点击浏览器菜单,保存网页到桌面,就可以正常下载了。
    3、本站不支持迅雷下载,请使用电脑自带的IE浏览器,或者360浏览器、谷歌浏览器下载即可。
    4、本站资源下载后的文档和图纸-无水印,预览文档经过压缩,下载后原文更清晰。
    5、试题试卷类文档,如果标题没有明确说明有答案则都视为没有答案,请知晓。

    ISO TR 25417-2007 Acoustics - Definitions of basic quantities and terms《声学 基本参量的定义和术语》.pdf

    1、 Reference number ISO/TR 25417:2007(E/R)ISO 2007TECHNICAL REPORT ISO/TR25417First editioneoe 2007-12-01Acoustics Definitions of basic quantities and terms ISO/TR 25417:2007(E/R) PDF disclaimer This PDF file may contain embedded typefaces. In accordance with Adobes licensing policy, this file may be

    2、printed or viewed but shall not be edited unless the typefaces which are embedded are licensed to and installed on the computer performing the editing. In downloading this file, parties accept therein the responsibility of not infringing Adobes licensing policy. The ISO Central Secretariat accepts n

    3、o liability in this area. Adobe is a trademark of Adobe Systems Incorporated. Details of the software products used to create this PDF file can be found in the General Info relative to the file; the PDF-creation parameters were optimized for printing. Every care has been taken to ensure that the fil

    4、e is suitable for use by ISO member bodies. In the unlikely event that a problem relating to it is found, please inform the Central Secretariat at the address given below. PDF Oooee o oao ao a PDF oe oea eoae . ooe eo o Adobe, o a oe oeaa aoa, oao o e oe ee, a ee ae, oa ee o e oe ee ao a ooae x o e

    5、oee aoa. aee aoeo aa aeeoae oo oaa a e oeeo a oee eox o Adobe. ea eeaa O e ee ao oeeo o ooe. Adobe e oo ao Adobe Systems Incorporated. ea, ooe oao oeee ooae oa aoeo aa PDF, o oooa e General Info aa; aae oa PDF ooa ea. e eoxoe e, o aaoa ooae ao ao e ea O. ex ax, oa o o oe ooa, oa ooa ea eeaa o ae, ee

    6、o e. COPYRIGHT PROTECTED DOCUMENT ISO 2007 The reproduction of the terms and definitions contained in this International Standard is permitted in teaching manuals, instruction booklets, technical publications and journals for strictly educational or implementation purposes. The conditions for such r

    7、eproduction are: that no modifications are made to the terms and definitions; that such reproduction is not permitted for dictionaries or similar publications offered for sale; and that this International Standard is referenced as the source document. With the sole exceptions noted above, no other p

    8、art of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the address below or ISOs member body in the country of the requester. , , , , , . : ; , ; . , , , , , ,

    9、 , , , . ISO copyright office Case postale 56 CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail copyrightiso.org Web www.iso.org Published in Switzerland/Oeaao ea ii ISO 2007 All rights reserved/ ISO/TR 25417:2007(E/R) ISO 2007 All rights reserved/ iiiForeword ISO (the Internatio

    10、nal Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical committee has been

    11、established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standar

    12、dization. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2. The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees are circulated to the member bodies for v

    13、oting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. In exceptional circumstances, when a technical committee has collected data of a different kind from that which is normally published as an International Standard (“state of the ar

    14、t”, for example), it may decide by a simple majority vote of its participating members to publish a Technical Report. A Technical Report is entirely informative in nature and does not have to be reviewed until the data it provides are considered to be no longer valid or useful. Attention is drawn to

    15、 the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. ISO/TR 25417 was prepared by Technical Committee ISO/TC 43, Acoustics, Subcommittee SC 1, Noise. ISO/TR 25417:2007(E/R) iv

    16、 ISO 2007 All rights reserved/ () (- ). . - . , , . () . , /, 2. . , , -. 75 % -. , , , , . , . , . . O/TR 25417 O/T 43, , 1, . ISO/TR 25417:2007(E/R) ISO 2007 All rights reserved/ vIntroduction This Technical Report is primarily intended for terminology harmonization within documents prepared by Te

    17、chnical Committee ISO/TC 43, Acoustics, Subcommittee SC 1, Noise. Other users, however, may find it of use. This Technical Report currently lists a select number of basic quantities and terms. If appropriate, further items may be added later. The definitions apply to aspects of linear sound in isotr

    18、opic fluidic media (unbounded liquids and gases without streaming), and where the effects of non-linearity, anisotropy, non-fluidity and superimposed flow are of minimal concern. The definitions are essentially consistent with ISO 80000-8. ISO/TR 25417:2007(E/R) vi ISO 2007 All rights reserved/ , ,

    19、O/T 43, , 1, . , , . . . ( ), , , . 80000-8. TECHNICAL REPORT ISO/TR 25417:2007(E/R) ISO 2007 All rights reserved/ 1Acoustics Definitions of basic quantities and terms 1 Scope 1 This Technical Report specifies definitions of acoustical quantities and terms often used in documents on noise measuremen

    20、t prepared by Technical Committee ISO/TC 43, Acoustics, Subcommittee SC 1, Noise, together with their symbols and units. The main purpose is to harmonize the terminology used in documents prepared by ISO/TC 43/SC 1, thus to avoid proliferation of diverging definitions. However, this Technical Report

    21、 may be applied to other purposes as well. , , O/T 43, , 1, , . , , O/T 43/ 1, , . , , . 2 Definitions 2 2.1 sound pressure p difference between instantaneous total pressure and static pressure ISO 80000-8:2007, 8-9.2 NOTE 1 Sound pressure is expressed in pascals. NOTE 2 The symbol, p, is often used

    22、 without modification to represent a root-mean-square sound pressure. However, root-mean-square values should be indicated by the subscript “eff”. 2.1 p 80000-8:2007, 8-9.2 1 . 2 , , - . eff. ISO/TR 25417:2007(E/R) 2 ISO 2007 All rights reserved/ 2.2 sound pressure level Lpten times the logarithm to

    23、 the base 10 of the ratio of the square of the sound pressure, p, to the square of a reference value, p0, expressed in decibels 22010lg dBppLp= where the reference value, p0, is 20 Pa NOTE 1 Because of practical limitations of the measuring instruments, p2is always understood to denote the square of

    24、 a frequency-weighted, frequency-band-limited or time-weighted sound pressure. If specific frequency and time weightings as specified in IEC 61672-1 and/or specific frequency bands are applied, this should be indicated by appropriate subscripts; e.g. Lp,AF denotes the A-weighted sound pressure level

    25、 with time weighting F. NOTE 2 This definition is technically in accordance with ISO 80000-8:2007, 8-22. 2.2 Lp , p, , p0, 22010lgppLp= , p0= 20 1 , - , p2 , , . 61672-1 / , ; ,Lp,AF A F . 2 - 80000-8:2007, 8-22. 2.3 time-averaged sound pressure level Lp,Tequivalent continuous sound pressure levelLp

    26、,eqTten times the logarithm to the base 10 of the ratio of the time average of the square of the sound pressure, p, during a stated time interval of duration, T (starting at t1and ending at t2), to the square of a reference value, p0, expressed in decibels ()212,eq201d10lg dBttpT p TpttTLLp=where th

    27、e reference value, p0, is 20 Pa NOTE 1 Because of practical limitations of the measuring instruments, p2is always understood to denote the square of a frequency-weighted and frequency-band-limited sound pressure. If a specific frequency weighting as specified in IEC 61672-1 and/or specific frequency bands are applied, this should be indicated by appropriate subscripts; e.g. Lp,A,10 sdenotesthe A-weighted time-averaged sound pressure level over 10 s. 2.3 Lp,T Lp,eqT , p, , T ( t1 t2), , p0, ()212,eq201d10lgttpT p Tp ttTLLp = , p0= 20 1 , , p2 , . 61672-1 / , ;


    注意事项

    本文(ISO TR 25417-2007 Acoustics - Definitions of basic quantities and terms《声学 基本参量的定义和术语》.pdf)为本站会员(syndromehi216)主动上传,麦多课文档分享仅提供信息存储空间,仅对用户上传内容的表现方式做保护处理,对上载内容本身不做任何修改或编辑。 若此文所含内容侵犯了您的版权或隐私,请立即通知麦多课文档分享(点击联系客服),我们立即给予删除!




    关于我们 - 网站声明 - 网站地图 - 资源地图 - 友情链接 - 网站客服 - 联系我们

    copyright@ 2008-2019 麦多课文库(www.mydoc123.com)网站版权所有
    备案/许可证编号:苏ICP备17064731号-1 

    收起
    展开