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【英文标准名称】:Electricalrelays;part7:testandmeasurementproceduresforelectromechanicalall-or-nothingrelays;identicalwithIEC60255-7:1991
【原文标准名称】:继电器.第7部分:电器机械开关继电器的检验和测量条件
【标准号】:DINIEC60255T.7-1993
【标准状态】:作废
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【发布单位】:德国标准化学会(DE-DIN)
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【标准类型】:()
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Product Code:SAE J2920
Title:Measurement of Tire/Pavement Noise Using Sound Intensity
Issuing Committee:Light Vehicle Exterior Sound Level Standards Committee
Scope: This standard specifies an engineering method for measuring acoustic power per unit area at points near the tire/pavement interface. The measurement quantifies the acoustic radiated sound intensity from the tire/pavement interface. This standard may be used to measure the sound intensity of varying tires and/or surfaces, over various operating conditions of the tire, or changes in surface characteristics.
Rationale: This standard specifies an engineering method for measuring acoustic power per unit area at points near the tire/pavement interface. The measurement quantifies the acoustic radiated sound intensity from the tire/pavement interface. This standard may be used to measure the sound intensity of varying tires and/or surfaces, over various operating conditions of the tire, or changes in surface characteristics.