 |
|||
|
|
|||
| ||||||||||
|
|  MIL-T-62531(AT)
APPENDIX A
4.14.1 Noise. The vehicle shall comply with both the exterior and interior noise limits
specified herein. Exterior Noise - The vehicle shall comply with the exterior noise requirements
as specified in MIL-STD-1474. Interior Noise - The steady state noise levels in personnel
occupied areas shall be below 85db(A) when measured for maximum noise as specified in
MIL-STD-1474. The personnel occupied areas shall be each operator or crew position.
Verification Rationale
Vehicles shall comply with both the exterior and interior noise limits outlined in
MIL-STD-1474. The exterior sound level limits shall not be exceeded when measured according
to the test procedure. The steady-state interior noise levels in personnel occupied areas shall not
be exceeded when measured by MIL-STD-1474 with a steady-state noise Category of D. The
personnel occupied areas shall be the following: Each operator and crew position, and
occasionally occupied positions.
Verification Guidance
The standard establishes the test procedure, environment, and instrumentation for
determining the maximum exterior and interior sound level for trucks. A suitable test site shall
consist of a level open space free of large reflecting surfaces, such as parked vehicles,
signboards, buildings, or hillsides location within 30 m (100 ft) of either the vehicle path or the
microphone. It is strongly recommended that technically trained personnel select the equipment
and that tests are conducted only by qualified persons trained in the current techniques of sound
management.
3.4.12 Windshield wiper system. The windshield wiper system shall meet the requirements
specified in SAE J198.
Rationale
SAE J198 establishes uniform test procedures and minimum performance requirements for
windshield wiping systems and wiper blades based on current engineering data.
4.14.2 Windshield wiper system. The windshield wiper system shall meet the requirements
specified in SAE J198.
Verification Rationale
SAE J198 contains the uniform test procedures for verifying the specified requirements.
Uniform terminology of windshield wiper system characteristics and phenomena may be found
in SAE J903, which also includes guides for the use of engineering layout studies to evaluate
system performance.
88
|
|
Privacy Statement - Press Release - Copyright Information. - Contact Us |
Click
here for thousands of PDF manuals