Solo Supplementals Addendum for Sound

1.1          PROCEDURE
1.1.1        A section of the course shall be selected as the measurement site.
The section shall be located where all vehicles will be driven at full throttle
as much as possible, i.e. a straightaway. An area 100 feet wide (from course
centerline) on each side of this section of the course must be free of
reflective surfaces larger than a lamp post.
1.1.2        The meter shall be located 50 feet from the edge of the course,
centered in the section, and perpendicular to the direction of travel of the
vehicle.  The meter shall be positioned 3 to 4 feet from the ground. All
readings shall be taken on the "A" scale, under SLOW response.
1.1.3        All cars passing through the measurement site shall be monitored.
Only those cars which register above the approved limit shall be recorded on the
noise monitoring log sheet. The recorded information shall include car, class
and number. As the vehicle passes, the highest reading shall be noted. Sound
reading shall be recorded for cars exceeding 93.0 dBA.  Under adverse
conditions, i.e. rain, the recorded readings may be only for cars exceeding 95.0
dBA.

1.1.4        Course communication should report noise readings above 97.0 dBA.

1.2          POLICY FOR READINGS BETWEEN 97.0 AND 100.0 dBA
1.2.1        Notification to drivers of vehicles with readings of 97.0 to 99 dBA
shall be made as soon as possible, preferably on the day of the occurrence.

1.3          POLICY WHEN NOISE LEVEL EXCEEDS 100.0 dBA
1.3.1        A run shall be defined as any time the vehicle enters the track,
regardless of specific driver.
1.3.2        Any run that results in a reading in excess of 100.0 dBA shall be
disqualified. There shall be no exceptions.
 1.3.3       Any run which exceeds 107.0 dBA shall result in immediate
disqualification of the vehicle from any subsequent run, which may include any
additional drivers. This disqualification shall extend until the vehicle can be
proven to the satisfaction of the Noise Committee Chair or his designee that the
vehicle conforms to the 100.0 dBA limit. An exception for valid mechanical
problems may be considered.
1.3.4        Upon completion of any run resulting in a reading in excess of
100.0 dBA, and prior to any following runs, the driver shall be notified of the
offense.

1.3.5        On the first violation the driver shall be required to immediately
make an attempt to bring the vehicle within compliance. Physical changes to the
vehicle that result in a drop in the noise output of the vehicle are the only
accepted means of compliance.
1.3.6        On the second violation of a single day’s event the driver shall be
given one final chance to bring the vehicle within compliance.
1.3.7        On the third violation of a single day’s event the vehicle shall be
disqualified from any subsequent competition, which shall include any additional
drivers. This disqualification shall extend until the driver or owner can prove
to the satisfaction of the Noise Committee Chair or his designee that the
vehicle conforms to the 100.0 dBA limit.


1.4          Unsportsmanlike Conduct
1.4.1        Any attempt to simply divert sound by directing the exhaust away
from the meter without reducing the level shall be considered unsportsmanlike
conduct and such is subject to immediate disqualification.  Permanently affixed
tips which divert to the side are not subject to this rule.  Diverting sound up
or down is not subject to this rule.  The intent is to prevent movable tips with
the intent of defeating sound measurement.