標準號：BS EN ISO 11204-2010
中文標準名稱：聲學.機械裝置及設備發出的噪聲.用精確環境修正測定工作地點和其它試驗場所聲壓級
英文標準名稱：Acoustics. Noise emitted by machinery and equipment. Determination of emission sound pressure levels at a work station and at other specified positions applying accurate environmental corrections
標準類型：Z32
發布日期：2010/8/31 12:00:00
實施日期：2010/8/31 12:00:00
中國標準分類號：Z32
國際標準分類號：17.140.20
適用范圍：This International Standard specifies a method for determining the emission sound pressure levels ofmachinery or equipment, at a work station and at other specified positions nearby, in any environment whichmeets certain qualification requirements. A work station is occupied by an operator and may be located inopen space, in the room where the source under test operates, in a cab fixed to the source under test, or in anenclosure remote from the source under test. One or more specified positions may be located in the vicinity ofa work station, or in the vicinity of an attended or unattended machine. Such positions are sometimes referredto as bystander positions.Emission sound pressure levels are determined as A-weighted levels. Additionally, levels in frequency bandsand C-weighted peak emission sound pressure levels can be determined in accordance with this InternationalStandard, if required.NOTE 1 The contents of the series ISO 11200 to ISO 11205 are summarized in ISO 11200.A method is given for determining a local environmental correction (subject to a specified limiting maximumvalue) to be applied to the measured sound pressure levels to exclude the effects of reflections from reflectingsurfaces other than the plane on which the source under test is placed. This correction is based upon themean sound pressure level on a measurement surface, the sound pressure level measured at a specifiedposition, and either an environmental correction or the equivalent absorption area of the test room.With the method specified in this International Standard, results of accuracy grade 2 (engineering grade) oraccuracy grade 3 (survey grade) are obtained. Corrections are applied for background noise and, asdescribed above, for the acoustic environment. Instructions are given for the mounting and operation of thesource under test and for the choice of microphone positions for the work station and for other specifiedpositions. One purpose of the measurements is to permit comparison of the performance of different units of agiven family of machines, under defined environmental conditions and standardized mounting and operatingconditions.NOTE 2 The data obtained can also be used for the declaration and verification of emission sound pressure levels asspecified in ISO 4871.