ISO / SAE J Development Status. Doug Moore Convener ISO WG42 Task Force 3 Lead, SAE VSP QRTV #4, Washington DC, July

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1 ISO / SAE J Development Status Doug Moore Convener ISO WG42 Task Force 3 Lead, SAE VSP QRTV #4, Washington DC, July

2 Overview Action since last QRTV Review of text Review of technical findings Comments from QRTV IG members Forecast of future work

3 Action since last QRTV ISO WG42 meeting in Warsaw, Poland April 2013 Review of text to address all issues identified in ballot comments as well as all issues identified in SAE comments to NHTSA NPRM. Joint SAE/ISO meeting at SAE HQ, Troy, Michigan June 2013 Review of testing work conducted for the purpose of evaluating the draft text for technical accuracy, practability, and clarity.

4 Current draft test procedure ISO editorial version. SAE J is technically identical.

5 Technical Findings Both overall SPL and 1/3 octave results can be measured and reported with sufficient precision. Treatment of background noise for 1/3 octave analysis established. Proper treatment of modulated signals remains as an outstanding topic. Pitch shift can be measured and reported with sufficient precision.

6 Indoor 1/3 Octave Measured Data Equipment On 4 4 db(a) db Octave 1/3 Hz A L

7 Indoor 1/3 Octave Measured data Equipment OFF 4 4 Octave 1/3 Front (A) WF 61 [0-30 s] Octave 1/3 Front (A) WF 61 [0-30 s] Octave 1/3 Front (A) WF 61 [0-30 s] Octave 1/3 Front (A) WF 61 [0-30 s] Octave 1/3 Front (A) WF 61 [0-30 s] Octave 1/3 Front (A) WF 61 [0-30 s] Octave 1/3 Front (A) WF 61 [0-30 s] Octave 1/3 Front (A) WF 61 [0-30 s] Octave 1/3 Front (A) WF 61 [0-30 s] Octave 1/3 Front (A) WF 61 [0-30 s] db(a) db Octave 1/3 Hz A L

8 Background Ambient Fluctuation Overall SPL: Equipment OFF F Overall level Front (A) Curve 3 Max Min s s s db(a) db(a) Amplitude s Time 3 3

9 Background Ambient Comments Measurement using IEC/ANSI 1/3 octave specifications successfully performed. Resulting fluctuation, while low, is still potentially significant. Conclusion: Using the maximum in each 1/3 octave band, and the overall SPL, as the basis for determining if the facility is acceptable is a practical and feasible specification.

10 Indoor Measurement of 1/3 octaves 0 km/hr 6 Modulation Effect 6 Octave 1/3 Left (A) 0 s Octave 1/3 Left (A) 0.5 s Octave 1/3 Left (A) 1 s Octave 1/3 Left (A) 1.5 s Octave 1/3 Left (A) 2 s Octave 1/3 Left (A) 2.5 s Octave 1/3 Left (A) 3 s Octave 1/3 Left (A) 3.5 s db(a) db Octave 1/3 Hz A L

11 Measurement of SPL (0, 10, 20 km/h) db(a) F F F Overall level Left (A) Overall level Left (A) Overall level Left (A) Amplitude 3 s Time 3

12 Indoor Measurement of 1/3 Octaves 10 km/hr db(a) db Octave 1/3 Hz A L

13 Indoor Measurement of 1/3 Octaves 20 km/hr 6 6 db(a) db Octave 1/3 Hz A L

14 Measurement of 1/3 Octaves Comments Sounds incorporating modulation will have effective detection distance underreported by using linear averaging. Maximum 1/3 octave? Need to consider if and how to account for modulation

15 Indoor Measurement of frequency shift 0 km/hr simulated speed F AutoPow er Left (A) db(a) Amplitude 202 Hz 640

16 Indoor Measurement of Frequency Shift 10 km/hr simulated speed F AutoPow er Left (A) db(a) Amplitude Hz 640

17 Indoor Measurement of Frequency Shift 20 km/hr simulated speed F AutoPow er Left (A) db(a) Amplitude Hz 640

18 Frequency Shift Comments Narrowband measurement indoors with simulated vehicle speed provides means to accurately and precisely identify frequency shift. Confirm this procedure is viable and technically accurate enough for regulatory purposes.

19 Comments from QRTV members Does the draft text provide for all necessary measurements to allow compliance verification for expected regulatory performance standards?

20 Forecast of Future Work July-September 2013: Continuing technical evaluations October 2013: ISO WG42 meeting to evaluate draft text (China). Target is to have CD ballot document as meeting outcome. Will also ballot in parallel the SAE J document. 2014: Continue technical work as identified: Resolution of any identified technical issues. Incorporation of any comments from QRTV IG or GRB regarding fitness for purpose. Expect ISO DIS document submitted for ballot in SAE and ISO will maintain technical commonality of texts.

21 Other questions? Thank you