Horn—Forward Warning—Electric—Performance, Test, and Application
- Ground Vehicle Standard
Broadened the scope of the standard to include nominal system voltages other than 12 and 24 V.Reason: To establish functional, environmental, and life cycle requirements for horns used in applications with nominal system voltages other than 12 or 24 V, such as battery powered vehicles.
Added a maximum horn activation delay of 100 ms.Reason: To insure timely horn activation after power application.
Removed sections which gave precautions regarding Multi-Instrument Systems, Calibration, Weather effects and use of windscreens.Reason: Section 5 states a requirement that persons technically trained and experienced in current techniques of sound measurement should select and operate the equipment. Such personnel will be aware of these precautionary measures.
Added a definition of “Sample Horn”.Reason: To insure that horns tested according to this standard are representative of production.
Added requirement that the same sample horn be used for all of the Functional, Environmental, and Life Tests.Reason: To clarify the intent of the standard to eliminate the possibility of a different sample horn being used for each of the test procedures.
Revised the predominant sound frequency lower limit requirement from 710 to 250 Hz.Reason: The majority of vehicle horns are low frequency devices that operate at approximately 350 Hz.
Revised the test distance requirement from horn to microphone to reduce the effect of near field measurement errors.
|Ground Vehicle Standard||Alarm—Backup—Electric Laboratory Performance Testing|
|Ground Vehicle Standard||Guarding of Starter System Energization|
|Ground Vehicle Standard||Vehicular Traffic Sound Signaling Devices (Horns)|
Data Sets - Support Documents
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|Table 1||SYSTEM TEST VOLTAGES|
|TABLE 2||MEASURING DISTANCE VERSUS FREQUENCY|
|TABLE 3||SOUND LEVEL TYPE RATING|
OPTC, SC3 shall be responsible for engineering standards for lighting and marking for off-road, self-propelled work machines, and equipment generally used in operations such as landscaping, construction sites, grounds keeping, highway and public works maintenance, mining, and material handling as covered by the scope of OPTC. Standards are harmonized with ISO standards as appropriate, and comments and direction are provided to the ISO US Technical Advisory Groups when requested.
|ANSI/S1.1||This document is not part of the subscrption.|
|ANSI/S1.13||This document is not part of the subscrption.|
|ANSI/S1.2||This document is not part of the subscrption.|
|ANSI/S1.4||This document is not part of the subscrption.|
|ANSI/S1.40||This document is not part of the subscrption.|
|ASTMB117||This document is not part of the subscrption.|
|ASTMC423-02a||This document is not part of the subscrption.|
|ASTME1050-98||This document is not part of the subscrption.|
|ISO9533||This document is not part of the subscrption.|
|J1116||This document is not part of the subscrption.|
|J1455_201703||Recommended Environmental Practices for Electronic Equipment Design in Heavy-Duty Vehicle Applications|
|J1849_202002||Emergency Vehicle Sirens|
|J184_201408||Qualifying A Sound Data Acquisition System|
|J994_201409||Alarm—Backup—Electric Laboratory Performance Testing|
|MIL-STD-810B||This document is not part of the subscrption.|