Part of making a regulation is our agencies must evaluate the environmental impact. Although I did not find it published in "www.regulations.gov", a draft is available at:
http://www.nhtsa.gov/staticfiles/rul...-noi-draft.pdf
The take-away are the proposed actions:
- Alternative 1: “No Action” Alternative - S.841 makes this impossible. There will be a regulation.
- Alternative 2: Recordings of Actual Internal Combustion Engine Sounds
- Alternative 3: Synthesized ICE-Equivalent Sounds
- Alternative 4: Combination of Synthesized Non-ICE Sounds and ICE Components to Aid Recognition
- Alternative 5: Synthesized Non-ICE Sounds Developed to Enhance Detectability
Also, it is important to look at the performance specifications which are not yet codified:
- Noise when car is READY and in "PARK" ?
- Noise when car has parking brake set ?
- Omni-directional versus forward when in "D" "B" and to rear when in "R"
Bob Wilson
- ZVW30
