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Interior noise Light Vehicle Exterior Sound Level Standards Committee Noise, Vibration, and Harshness (NVH) Optics Automotive Lasers

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Standard

Engine Sound Level Measurement Procedure
2000-02-07
HISTORICAL
J1074_200002
This SAE Recommended Practice sets forth the equipment, environment, and test procedures to be used in measuring sound levels of engines. The purpose is to provide a uniform method of measuring the maximum acoustical radiation from the exterior surfaces of an engine under representative engine operating conditions. The measured sound levels will be useful in development of engines, comparison of engines, and installation of engines in various applications. The correlation of the measured engine sound levels to the various application sound levels will have to be developed.
Standard

MAXIMUM SOUND LEVEL FOR PASSENGER CARS AND LIGHT TRUCKS
1985-09-01
HISTORICAL
J1030_198509
This SAE Recommended Practice establishes the test procedure, environment, and instrumentation for determining the maximum exterior sound level of passenger cars, multipurpose vehicles, and light trucks having a gross vehicle mass (weight) rating of 4540 kg (10 000 lb) or less. This Recommended Practice is intended for use when the maximum sound generating capability of any applicable vehicle is to be measured. The test procedure is characterized by having fixed terminal conditions (attainment of rated engine speed at a fixed end point on the test site) in contrast to the procedure of SAE Standard J986 NOV81, Sound Level for Passenger Cars and Light Trucks, which has fixed initial conditions (specified initial vehicle speed at a fixed acceleration point on the test site). Full-throttle acceleration and closed-throttle deceleration of the vehicle are included in both procedures.
Standard

MAXIMUM SOUND LEVEL FOR PASSENGER CARS AND LIGHT TRUCKS
1977-01-01
HISTORICAL
J1030_197701
This SAE Recommended Practice establishes the test procedure, environment, and instrumentation for determining the maximum exterior sound level for passenger cars, multipurpose vehicles, and light trucks with a gross vehicle weight rating (GVWR) of 4540 kg (10 000 lb) or less. This Recommended Practice is intended for use when the maximum sound generating capability of any applicable vehicle is to be measured. The test procedure is characterized by having fixed terminal conditions (attainment of rated engine speed at a fixed end point on the test site) in contrast to the procedure of SAE Standard J986b, Sound Level For Passenger Cars And Light Trucks, which has fixed initial conditions (specified initial vehicle speed at a fixed acceleration point on the test site). Full-throttle acceleration and closed-throttle deceleration of the vehicle are included in both procedures.
Standard

MEASUREMENT OF LIGHT VEHICLE EXHAUST SOUND LEVEL UNDER STATIONARY CONDITIONS
1992-03-01
HISTORICAL
J1169_199203
This SAE Standard establishes the test procedure, environment, and instrumentation to be used for measuring the exhaust sound level for passenger cars, multipurpose vehicles, and light trucks under stationary conditions. Measurements are taken under steady-state conditions. In this respect, this procedure differs from ISO 5130 which includes measurements under the dynamic conditions of an engine deceleration. This sound level measurement procedure has been developed as a guide for governmental agencies establishing vehicle in-service sound level regulations and enforcement measurement procedures. It is directed at the assessment of vehicle exhaust noise and is not intended to determine maximum vehicle sound levels. (See Appendix A.)
Standard

MEASUREMENT OF LIGHT VEHICLE EXHAUST SOUND LEVEL UNDER STATIONARY CONDITIONS
1977-01-01
HISTORICAL
J1169_197701
This SAE Recommended Practice establishes the test procedure, environment, and instrumentation to be used for measuring the exhaust sound level for passenger cars and light trucks under stationary conditions. This sound level measurement procedure has been developed as a guide for governmental agencies establishing vehicle in-service sound level limitations and enforcement measurement procedures. It is directed at the assessment of vehicle exhaust noise and is not designed to determine maximum vehicle sound levels.
Standard

MEASUREMENT OF LIGHT VEHICLE EXHAUST SOUND LEVEL UNDER STATIONARY CONDITIONS
1987-02-01
HISTORICAL
J1169_198702
This SAE Standard establishes the test procedure, environment, and instrumentation to be used for measuring the exhaust sound level of passenger cars, multipurpose vehicles, and light trucks under stationary conditions. This sound level measurement procedure has been developed as a guide for governmental agencies establishing in-service sound level limitations and enforcement measurement procedures. It is directed at the assessment of vehicle exhaust noise and is not intended to determine maximum vehicle sound levels.
Standard

MEASUREMENT OF LIGHT VEHICLE EXHAUST SOUND LEVEL UNDER STATIONARY CONDITIONS
1985-09-01
HISTORICAL
J1169_198509
This SAE Standard establishes the test procedure, environment, and instrumentation to be used for measuring the exhaust sound level of passenger cars, multipurpose vehicles, and light trucks under stationary conditions. This sound level measurement procedure has been developed as a guide for governmental agencies establishing in-service sound level limitations and enforcement measurement procedures. It is directed at the assessment of vehicle exhaust noise and is not intended to determine maximum vehicle sound levels.
Standard

MEASUREMENT OF LIGHT VEHICLE STATIONARY EXHAUST SYSTEM SOUND LEVEL ENGINE SPEED SWEEP METHOD
1992-03-01
HISTORICAL
J1492_199203
This SAE Recommended Practice establishes the test procedure, environment, and instrumentation to be used for measuring the exterior exhaust sound level for passenger cars, multipurpose vehicles, and light trucks under stationary conditions providing a continuous measure of exhaust system sound level over a range of engine speeds. This sound level measurement procedure has been developed for use in engineering evaluation of the sound level performance of passenger car and light truck exhaust systems. It provides the means for detecting exhaust system resonances with the potential to affect both exterior and interior sound quality. This document incorporates certain provisions of ISO 5130-1982-02-15, for measuring the sound level of exhaust systems. (See Appendix A.)
Standard

MEASUREMENT OF NOISE EMITTED BY ACCELERATING HIGHWAY VEHICLES
1984-10-01
HISTORICAL
J1470_198410
This SAE Recommended Practice is equivalent to ISO Standard 362–1981 except for the differences detailed in the Appendix, and includes the modifications adopted by WP29 in ECE R51. This SAE Recommended Practice specifies an engineering method for measuring the noise emitted by accelerating highway vehicles of all types (except motorcycles) in intermediate gears with full utilization of the available engine power. The method is designed to meet the requirements of simplicity and reproducibility of results under realistic vehicle operating conditions. Measurements relate to operating conditions of the vehicle which give the highest noise level consistent with urban driving and which lead to reproducible noise emissions. Therefore, an acceleration test at full throttle from a stated engine or vehicle speed is specified. The test method calls for an acoustical environment which can only be obtained in an extensive open space.
Standard

MEASUREMENT OF NOISE EMITTED BY ACCELERATING HIGHWAY VEHICLES
1992-03-01
HISTORICAL
J1470_199203
This SAE Standard is equivalent to ISO Standard 362-1981 except for the differences detailed in Appendix A, and includes the modifications adopted by WP29 in ECE R51. This document specifies an engineering method for measuring the noise emitted by accelerating highway vehicles of all types (except motorcycles) in intermediate gears with full utilization of the available engine power. The method is designed to meet the requirements of simplicity and reproducibility of results under realistic vehicle operating conditions. Measurements relate to operating conditions of the vehicle which give the highest noise level consistent with urban driving and which lead to reproducible noise emissions. Therefore, an acceleration test at full throttle from a stated engine or vehicle speed is specified. The test method calls for an acoustical environment which can only be obtained in an extensive open space.
Standard

MEASUREMENT PROCEDURE FOR DETERMINATION OF SILENCER EFFECTIVENESS IN REDUCING ENGINE INTAKE OR EXHAUST SOUND LEVEL
1984-05-01
HISTORICAL
J1207_198405
This SAE Recommended Practice sets forth the instrumentation, environment, and test procedures to be used in measuring the silencer system effectiveness in reducing intake or exhaust sound level of internal combustion engines. The system shall include the intake or exhaust silencer, related piping, and components. This procedure is intended for engine-dynamometer testing and is not necessarily applicable to vehicle testing (see Appendix A). The effect of the exhaust or intake system on the sound level of the overall machine must be determined using other procedures. This procedure may be successively applied to various silencer configurations to determine relative effectiveness for that engine. Insertion loss for individual silencers may be calculated through measurement of the silenced and unsilenced system.
Standard

Maximum Sound Level for Passenger Cars and Light Trucks
2002-10-21
CURRENT
J1030_200210
This SAE Recommended Practice establishes the test procedures, environment, and instrumentation for determining the maximum exterior sound level of passenger cars, multipurpose vehicles, and light trucks having a gross vehicle mass (weight) rating of 4540 kg (10 000 lb) or less. This document is intended for use when the maximum sound generating capability of any applicable vehicle is to be measured. The test procedure is characterized by having fixed terminal conditions (attainment of rated engine speed at a fixed end point on the test site) in contrast to the procedure of SAE J986 NOV81, Sound Level for Passenger Cars and Light Trucks, which has fixed initial conditions (specified initial vehicle speed at a fixed acceleration point on the test site). Full-throttle acceleration and closed-throttle deceleration of the vehicle are included in both procedures.
Standard

Measurement Procedure for Determination of Silencer Effectiveness in Reducing Engine Intake or Exhaust Sound Level
2000-02-07
HISTORICAL
J1207_200002
This SAE Recommended Practice sets forth the instrumentation, environment, and test procedures to be used in measuring the silencer system effectiveness in reducing intake or exhaust sound level of internal combustion engines. The system shall include the intake or exhaust silencer, related piping, and components. This procedure is intended for engine-dynamometer testing and is not necessarily applicable to vehicle testing (see Appendix A). The effect of the exhaust or intake system on the sound level of the overall machine must be determined using other procedures. This procedure may be successively applied to various silencer configurations to determine relative effectiveness for that engine. Insertion loss for individual silencers may be calculated through measurement of the silenced and unsilenced system.
Standard

Measurement of Exterior Sound Levels for Heavy Trucks Under Stationary Conditions
2000-05-03
HISTORICAL
J1096_200005
This SAE Recommended Practice establishes the test procedure, environment, and instrumentation for determining the maximum exterior sound level of highway motor trucks and truck tractors over 4540 kg gross vehicle weight rating (GVWR) with governed engines under stationary vehicle conditions. The basic procedure involves a full throttle engine acceleration and a closed throttle deceleration with the engine inertia as the load.
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