The gear and shall be chosen in that way, so as the test condition vAA’ complies with the control range specifications and that > nBB’ 1,15*nBB’_ref Pretests may be carried out in order to determine an appropriate measurement condition. 3.3.3.2 The sound level determination shall be performed as described in paragraph 3.1.3 of Annex 3. At least two measurements shall be made on each side of the vehicle. The final sound level result shall be calculated according to paragraph 3.1.4. of Annex 3. 3.3.3.3 Data processing and reporting The engine speed measurements at AA' and BB' shall be averaged arithmetically. The results in units of min-1 shall be mathematically rounded to the nearest integer. The value shall be used for the calculations nBB’ specified in paragraph 4 of this Annex. The final sound pressure level for the full throttle acceleration shall not exceed the limits specified in paragraph 4 of this Annex. 4. ASEP limits The maximum noise level recorded during the passage of the vehicle through the test track shall not exceed: Lref + (1 * (nBB' + [3] for nBB' < and – nBB’_ref) / 1,000) nBB’_ref Lref + (5 * (nBB' + [3] for nBB' – nBB’_ref) / 1,000) ≥ nBB’_ref with Lref and as specified in paragraph 3.3.1 and as specified nBB’_ref nBB’ in paragraphs 3.3.2 and 3.3.3. Comment: The ASEP requirements, proposed in this document, should be checked/assessed by measurements performed for vehicles of current or future technologies.
The gear and vAA’ shall be chosen in that way, so as the test condition complies with the control range specifications and that nBB’ > 1,15*nBB’_ref Pretests may be carried out in order to determine an appropriate measurement condition. 3.3.3.2 The sound level determination shall be performed as described in paragraph 3.1.3 of Annex 3. At least two measurements shall be made on each side of the vehicle. The final sound level result shall be calculated according to paragraph 3.1.4. of Annex 3. 3.3.3.3 Data processing and reporting The engine speed measurements at AA' and BB' shall be averaged arithmetically. The results in units of min-1 shall be mathematically rounded to the nearest integer. The nBB’ value shall be used for the calculations specified in paragraph 4 of this Annex. The final sound pressure level for the full throttle acceleration shall not exceed the limits specified in paragraph 4 of this Annex. 4. ASEP limits The maximum noise level recorded during the passage of the vehicle through the test track shall not exceed: Lref + (1 * (nBB' – nBB’_ref) / 1,000) + [3] for nBB' < nBB’_ref and Lref + (5 * (nBB' – nBB’_ref) / 1,000) + [3] for nBB' ≥ nBB’_ref with Lref and nBB’_ref as specified in paragraph 3.3.1 and nBB’ as specified in paragraphs 3.3.2 and 3.3.3. Comment: The ASEP requirements, proposed in this document, should be checked/assessed by measurements performed for vehicles of current or future technologies.
GRB-66-10e.docx