NOHVCC SOUND
RESOURCES PAGE
The Sound
Advice document
Sound Advice is the product of a
two-year effort by the Motorcycle Sound
Working Group, which was formed in 2003,
and included representatives of the
street and off-road riding communities,
as well as motorcycle manufacturers,
aftermarket companies, event organizers,
and representatives from law
enforcement, municipal government,
research institutions and regulatory
agencies.
The document was released following the
second National
Summit on Motorcycle Sound.
Click here to view
Sound Advice (.pdf).
Information on
purchasing sound testing equipment
To perform sound testing in the field
you will need a tachometer, sound meter,
and RPM data sheets. The tachometer that most folks use is a
vibrating reed tachometer available for
about $25. The actual brand of the tach
is Treysit but it is sold by both Briggs
and Stratton and Tecumseh for testing
small engines. You may be able to order
them through small engine repair shops.
The NOHVCC has ordered them from
www.machovec.com
Here's a direct link to the tachometer
on their site;
http://www.machovec.com/quest/vibratach.htm
This is probably the easiest source to
buy from.
As for sound meters, we've
found that the cheap units from
companies like Radio Shack are very
inaccurate and not worth the effort or expense.
For a more high-quality unit, we've been
happy with the
Quest sound meters.
Machovec also provides Quest sound meter and tachometer packages for a competitive cost. If you are
looking for a good quality meter to use
for educational purposes check out the Intercomp
sound meter at:
Intercomp
Sound meter page
You can get RPM data sheets from the MIC
Sound Manual (see below) and from
the
Motorcycle Industry Council downloads
page
for the latest updates.
Sound testing
data
California State Site
Oregon Site
Sound test
training
Link to
MotorcycleNoise.com (DPS Inc.) which
contains information on sound test
training and many other sound resources.
Quiet your
ride and add free horsepower!
Step-by-Step
Muffler Repacking Tips from ATV Rider
Magazine
Sound levels
for AMA racing
2007 level is 99
dB(a) with lower levels in coming years
MOTORCYCLE INDUSTRY COUNCIL STATIONARY
SOUND TEST MANUAL
E-mail or call us
for a free copy
The Motorcycle Industry Council provides
this manual for those interested in the
effective and economical enforcement and
evaluation of off-highway motorcycles
and ATVs in the field. The manual
details the entire procedure for
implementing the SAE J1287 sound test
which is used by most land management
agencies throughout the country. The
manual also contains sound data and RPM
testing levels for a wide variety of
off-highway motorcycle and ATV models
and years. This list is updated quite
frequently with inserts or you can go to
the
Motorcycle Industry Council downloads
page
for the latest updates.
E-mail us at
trailhead@nohvcc.org
or call (800)348-6487 to obtain a
copy.
|
