ISO 9296:2017由国际标准化组织 IX-ISO 发布于 2017-08-17。
ISO 9296:2017在国际标准分类中归属于: 35.020 信息技术(IT)综合。
ISO 9296:2017 声学 - 声明信息技术和电信设备的噪声排放值的最新版本是哪一版?
最新版本是 ISO 9296:2017 。
* 在 ISO 9296:2017 发布之后有更新,请注意新发布标准的变化。
This document is applicable to information technology and telecommunications equipment. It specifies: a) for a batch of equipment, the method for determining the following values: — the declared mean A-weighted sound power level, LWA,m; — the declared mean A-weighted emission sound pressure level, LpA,m; — the statistical adder for verification, Kv; — the statistical upper limit A-weighted sound power level, LWA,c; b) how acoustical and product information is to be published electronically or in hard-copy format in technical documents or other product literature supplied to users by the manufacturer or declarer; c) the method for verifying the noise emission values that are declared by the manufacturer or declarer. NOTE The terms “manufacturer” and “declarer” are used in this document to represent any entity that provides product noise emission information. For instance, a product supplier or importer who does not manufacture the hardware, but offers noise emissions information, is also referred to a manufacturer or a declarer as applicable, in this document. The uniform methods in this document use the noise emission data obtained in accordance with The basic noise emission values to be declared are the declared mean A-weighted sound power levels, LWA,m. Optionally, the declared mean A-weighted emission sound pressure levels at the operator or bystander positions, LpA,m, can be declared. These are arithmetic mean values based upon measurements on a random sample of equipment of the batch, in accordance with ISO 7779. For verification purposes, an additional quantity is required to be declared: the statistical adder for verification, Kv. This is a quantity that is added to the declared mean A-weighted sound power level, LWA,m, and used in the verification section of this document to provide a consistent and predictable probability of acceptance for the batch of equipment. The declared mean A-weighted sound power level for the batch of equipment permits comparison of noise emissions between different products and permits predictions of installation or work-place noise immission levels, as described in ECMA TR/27.[9] Although the most useful quantity for calculating immission levels due to one or more noise sources is the A-weighted sound power level of the individual source(s), the A-weighted emission sound pressure level may also be useful in estimating the immission level in the immediate vicinity of an isolated piece of equipment. To avoid confusion between sound power levels and emission sound pressure levels, the declared mean A-weighted sound power level, LWA,m, is expressed in bels (B) and the declared mean A-weighted emission sound pressure level, LpA,m, is expressed in decibels (dB).
《智能眼镜声学性能测试规范》 智能眼镜是指如同智能手机一样拥有独立的操作系统,可以通过软件安装来实现各种功能的可穿戴的眼镜设备统称。其可以是与智能设备通过蓝牙等无线连接方式连接后实现声音的采集和播放,也可以由具有独立的控制系统、显示系统和声学系统组成,其中声学系统包括有采集声音的传感器和发出可听声的扬声器以及相应的声信号处理部分构成,其性能直接影响智能眼镜的交互效果。 ...
这种利用声学、电子学和信息处理等技术,将声音变换成人眼可见的图像的技术可以帮助人们直观地认识声场、声波、声源,便捷地了解机器设备产生噪声的部位和原因,物体(机器设备)的声像反映了其所处的状态。一般获取声像图是采用声场计算的方式,计算量巨大,普通计算机需要几天时间才能计算出一幅声像图,而且必须专业人士才能够计算,用传声器阵列的方式获取声像图只需0.8秒的计算时间,而且操作非常简单。 ...
在GB22337-2008和GB12348-2008标准中, 首次提出结构传播固定设备室内噪声排放限值, 规定当排放的噪声通过建筑物结构传播至噪声敏感建筑物室内时, 噪声敏感建筑物室内等效声级既不得超过规定的A声级限值, 也不得超过规定的室内噪声倍频带声压级限值,(倍频带中心频率为31.5Hz,63Hz,125Hz250Hz,500Hz, 其覆盖频率为22Hz-707Hz) 这是考虑到不管是工业企业固定设备排放的噪声...
Copyright ©2007-2022 ANTPEDIA, All Rights Reserved
京ICP备07018254号 京公网安备1101085018 电信与信息服务业务经营许可证:京ICP证110310号