MA and NH have issued dB meters to police in many towns. They have established measurement methods, sound limits and have trained the police. It is not uncommon for the police to issue tickets in 'seasonal' areas. During a by-the-book inspection in NH the inspector is supposed to verify that the exhaust baffles are still in place, a.k.a. pass the broom handle test.
In NH you don't have to do anything, the State House nanny law has already set up laws and enforcement rules to govern sound levels beginning in 2010. All you may need to do is dime the police when you are offended by loud pipes. [SIZE=14pt]BUT WAIT --[/SIZE] there is more -- they have also legislated a requirement for motorcycles to have a tachometer too. The Saves Lives group ain't gonna love this bit of legislation.
Edit: I just did a NH General Court Bill Status check and found that the following bill was killed on the floor, they are now doing a rewrite and will try again. I have not been able to locate the revamped bill yet. I am leaving the now dead bill as an example of what NH and MA are trying to get done for state level noise programs. Local noise ordinances are still in place, with the sound inspections very much like the one outlined in this bill.
New Hampshire House Bill:
HB 95 – AS INTRODUCED
2009 SESSION
09-0234
03/01
HOUSE BILL 95
AN ACT relative to motorcycle equipment and noise levels.
SPONSORS: Rep. J. Day, Rock 13; Rep. Henson, Rock 13; Rep. Kepner, Rock 15
COMMITTEE: Transportation
ANALYSIS
This bill:
I. Prohibits motorcycle exhaust modifications.
II. Reduces permissible motorcycle noise levels.
III. Increases maximum fines for motorcycle noise violations.
IV. Requires motorcycles to have functioning tachometers.
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Matter removed from current law appears [in brackets and struckthrough.]
Matter which is either (a) all new or (b ) repealed and reenacted appears in regular type.
STATE OF NEW HAMPSHIRE
In the Year of Our Lord Two Thousand Nine
AN ACT relative to motorcycle equipment and noise levels.
Be it Enacted by the Senate and House of Representatives in General Court convened:
1 New Paragraph; Motorcycle Muffler Modifications. Amend RSA 266:59 by inserting after paragraph IV the following new paragraph: V.
(a) No person shall modify the exhaust system of a motorcycle in any manner.
(b ) No person shall drive on a way a motorcycle that has after market equipment installed to replace the muffler.
(c ) Any person who violates the provisions of this paragraph shall be guilty of a violation and shall be fined not less than $100 nor more than $500.
2 Motorcycle Noise Levels. Amend RSA 266:59-a to read as follows:
266:59-a Motorcycle Noise Levels.
I. No person shall operate a motorcycle which has a measured noise level of more than [106] 95 decibels on the decibel meter when measured 20 inches from the exhaust pipe at a 45 degree angle while the engine is operating at 2,800 revolutions per minute for one and 2 cylinder motorcycles and 3,500 revolutions per minute for any motorcycle with 3 or more cylinders.
II. No person shall pass for the purposes of the inspection required by RSA 266:1 any motorcycle which has a measured noise level of more than [106] 95 decibels on the decibel meter when measured 20 inches from the exhaust pipe at a 45 degree angle while the engine is operating at 2,800 revolutions per minute for one and 2 cylinder motorcycles and 3,500 revolutions per minute for any motorcycle with 3 or more cylinders.
II-a. No person shall operate in this state any motorcycle which produces a sound level in excess of [106] 95 decibels on the A scale, when measured in accordance with the provisions of the Society of Automotive Engineers Recommended Practice ANSI/SAE J-1287 annual report on “Measurement of Exhaust Sound Levels of Stationary Motorcycles.”
III. Any person who violates the provisions of this section shall be guilty of a violation and shall be fined not less than $100 nor more than [$300] $500.
3 New Section; Equipment of Vehicles; Motorcycles; Tachometer. Amend RSA 266 by inserting after section 77 the following new section:
266:77-a Tachometer. No person shall drive on a way a motorcycle without a functioning tachometer. Any person who violates the provisions of this section shall be guilty of a violation and shall be fined not less than $100 nor more than $500.
4 Effective Date. This act shall take effect January 1, 2010.