What is ISO 362-1 - Noise emitted by road vehicles about?
ISO 362 is a series of international standards on the measurement of noise emitted by accelerating road vehicles that discusses the best engineering method required for measuring noise emission. ISO 362-1 is the first part of a series of documents on the measurement of noise emitted by accelerating road vehicles.
ISO 362-1 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 and L2, which are covered by ISO 9645, and vehicles of category L3, L4, and L5, which are covered by ISO 362-2.
The specifications are intended to reproduce the level of noise generated by the principal noise sources during normal driving in urban traffic (see Annex A).
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
- Type approval measurements of a vehicle
- Measurements at the manufacturing stage
- 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 the 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 part of ISO 362, the results obtained can deviate appreciably from the results obtained using the specified conditions.
Who is ISO 362-1 - Noise emitted by road vehicles for?
ISO 362-1 on noise emitted by road vehicles is relevant to:
- Automobile industry
Why should you use ISO 362-1 - Noise emitted by road vehicles?
The noise is defined as an unwanted sound that has an unpleasant and annoying effect.. Road transport is a major source of environmental noise. The problem of vehicle noise has been observed since the appearance of the larger number of vehicles on the roads.
ISO 362-1 provides guidance on the specification of the acceleration for vehicles of categories m1 and m2 having a maximum authorized mass not exceeding 3 500 kg and of category n, instrumentation, acoustical environment, meteorological conditions, and background noise, test procedures.
As a user of ISO 362-1, you can be ensured of engineering methods for measuring the noise emitted by road vehicles. With obedience and compliance to ISO 362-1, you can efficiently
measure noise generated by vehicles. With ISO 362-1you can be ensured of M and N categories of vehicles.
