This SAE Standard is equivalent to ISO 362-1:2015 and specifies an engineering method for measuring the noise emitted by road vehicles of categories M and N under typical urban traffic conditions. It excludes vehicles of category L1, L2, L3, L4, and L5.
The specifications are intended to reproduce the level of noise generated by the principal noise sources during normal driving in urban traffic. The method is designed to meet the requirements of simplicity as far as they are consistent with reproducibility of results under the operating conditions of the vehicle.
The test method requires an acoustical environment that is obtained only in an extensive open space. Such conditions are usually provided for during:
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measurements of vehicles for regulatory certification and/or type approval
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measurements at the manufacturing stage, and
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measurements at official testing stations
NOTE 1: The results obtained by this method give an objective measure of the noise emitted under the specified conditions of test. It is necessary to consider the fact that the subjective appraisal of the noise annoyance of different classes of motor vehicles is not simply related to the indications of a sound measurement system. As annoyance is strongly related to personal human perception, physiological human conditions, culture, and environmental conditions there is a large variation and it is therefore not useful as a parameter to describe a specific vehicle condition.
NOTE 2: Spot checks of vehicles chosen at random are rarely made in an ideal acoustical environment. If measurements are carried out on the road in an acoustical environment that does not fulfill the requirements stated in this document, the results obtained may deviate appreciably from the results obtained using the specified conditions.
Rationale
This procedure has been updated to align with modifications to the ISO 362-2015 standard.
This Surface Vehicle Standard was developed to provide a method to measure the noise emission of road vehicles consistent with actual in-use urban vehicle noise emission. This document was further developed to provide a performance based and technology neutral test standard to reflect the development of engine and propulsion technologies that cannot be correctly tested under existing SAE Standards.
The Light Vehicle Exterior Sound Level Standards Committee is part of the Vehicle Engineering Sound Level Forum Committee that reports to the Vehicle Systems Group of the Motor Vehicle Council. The Committee is responsible for developing and maintaining SAE Standards, Recommended Practices, and Information Reports related to the measurement of sound levels in passenger cars and light trucks including pickups, vans and sport utility vehicles. While the sound measurement techniques have remained constant for a number of years, changes in the vehicle powertrain configurations require updates to ensure comparable operating methods for the variety of products. The committee has also undertaken the review and coordination of comments related to the procedures being developed by the International Organization for Standardization's (ISO) Working Group 42, Measurement of noise emission (external) from road vehicles. The committee will also review the technical validity of any governmental regulations promulgated by the United States or other countries where US products are being sold. Participants in the SAE Light Vehicle Exterior Sound Level Standards Committee include OEMs, suppliers, consulting firms, government, and other interested parties.
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J2805_201511
Measurement of Noise Emitted by Accelerating Road Vehicles
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Measurement of Noise Emitted by Accelerating Road Vehicles
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