So, we measured sound again at Round 2 today. I want to thank the people
who worked this event for doing this. Anyone who wants to work "Sound" in the
future, please let me know.
Sound was measured in every group, from a distance of 50 feet. We tried
several different locations, all inside the left hand sweeper near the end of
the course. I found that no matter how we positioned the meter, the cars
seemed to give me their loudest readings as they were going away, and beyond
the
50' point. Probably 70-90 feet. So, realistically, you should probably add
1-2 dB to your numbers if you're trying to reach a lower number (for instance
San Diego's 93 dBA @ 50' limit.) And, once again, as concerns SFR's limit of
95 dB @ 100', subtract 6 dB from the numbers listed.
Several interesting things happened while measuring. Several cars that
weren't even on the display (less than 90 dB) had spikes of tire noise in the
low
90's. One, Mike McHugh in the 6th group, didn't make any noise of 90 or
above, until he had the misfortune of spinning in front of the sound meter.
First, his engine revved and the meter read 96, then as it came around, he got
out of the throttle, and his tire squeal measured 100! This is of little
significance, but I thought it interesting and worth sharing...
Group 1:
#82: 92/93
#330: 97/97
#35: 92
#13: 95/93/91
#11 ES: 94/96
#240: 97/95
#130: 98/97/96
#07: 94/94
#70: 90/90
#28: 93
#113: 95
#33: 92
Group 2:
#80/SM2: 103/102
#RED CRX: 92
#69/BSPV: 102
#74/0SP: 99
#1/OSP(?): 104
#8/SM2: 96
#130: 91
#79/SM: 94
#77: 96
#07/SM2: 100
#23: 95
#72/SM: 98
#84FSP: 102
#79: 95
#26: 94
#130: 90
#137/SM: 94
Group 3:
#1/SS: 91
#78/SS: 95/96/96
#178/SS: 98/92/98
#712/AS: 91/91
#04/AS: 90
#112/AS: 90
#42/AS: 91
#13/BS: 93/90/95
#31/BS: 90/94
#7/BS: 91
#71/BS: 91
#24/BS: 90
#88/BSN: 92/97/99
#231/ES: 91
Group 4:
#72/ASP: 96/95/95
#172/ASP: 96/96/95
#62/ASPL: 95/94/94
#162/ASP: 93/94/96
#698/ASP: 92/92
#51/FSP: 93/92/94
#51/STS: 98/100/99
#151/STS: 99/98/97
#63/STS: 93/95/94
#79/STS: 95/96/93
#21/STS: 96/95/95/95
#12/STS: 94/94/94
#369/STS: 93/95/96
#39/STS: 91/92/94
#78/STS: 93/90
#178/STS: 91/93/90
#31/STS: 94/95/93
#13/STS: 94/93/94
#42/STS: 90
#81/STS: 94/91/95
#91/STS: 90/91/92
#275/STS: 90/93/91
Group 5:
#81: 91/94/94
#181: 91/94/95
#1/STU: 92/91
#69/STU: 91/92
#79/STU: 91
#31/STUN: 90
#93/STUN: 90/90
#179/STX: 95/94/95
#79/STX: 95/94
#401/SM: 91/92
#188/EP: 93/94/94
#88/EP: 95/95
#91/FP: 95/94
#71/XP: 92/93/93
#171/XP: 94
Group 6:
#17/CSP: 95/96/97
#66/CSP: 95/98/98
#92/CSP: 101/104/104
#92/CSPL: 98/102/102/104
#21/CSP: 91/93/93
#49/CSP: 96/99/99
#49/CSPL: 95/96/99
#13/CSP: 94
#77/DSPL: 92/94/91
#177/DSP: 91/94/95/95
#4/DSP: 91/91/93
#88/DSP: 91/90
#11/SM2-T2: 95/98
#11/CIVIC: 93/95/100
#108/ASP-T2: 94/95/97
#996/ASP-T2: 91/95/97
#54/CSP-T2:92
The short list that follows is the list of cars that were over SFR's limit,
so the actual measured numbers from 50' were 6dB higher, and I've already
deducted the 6 dB so they equate to our 100' measuring distance. Those cars
are
being given an official warning and the below numbers are listed in the
results.
#80 SM2: 97 dBA
#69 BSPV: 96 dBA
#1 (2nd run group, yellow older Japanese car, probably the starlet...):
98dBA
#84 FSP: 96dBA
#92 CSP: 98dBA
#92 CSPL: 98dBA
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