Some aspects of motorcycle noise emission

Some aspects of motorcycle noise emission by P. M. Nelson Download PDF EPUB FB2

In the ’s, when the EPA’s Office of Noise Abatement and Control (ONAC) was in operation, it established noise emission limits for highway and off-road motorcycles. The purpose of those regulations was to provide a minimum of protection to the public from excessive motorcycle noise and to establish a national uniformity of treatment for the that source of noise pollution.

IS Because the test procedure measures motorcycle 16 noise under the extreme stress conditions of maximum 17 acceleration, and normal operation produces significantly 18 lower noise emissions, we believe that the 83 dB(A) level 19 is sufficiently quiet to eliminate noise impacts from new 20 untampered exhaust systems.

21 We do not believe there is a demonstrated need 22 for maximum. However, further work on the full effects of the test procedure on a wider range of motorcycle types is desirable.

The BS test was not found to be suitable for use on high powered, large engine capacity, motorcycles. The EEC close proximity stationary test was found to fulfill the basic requirements of an in-use test procedure.

Motorcycle Noise Emission Motorcycles have the highest technical potential of noise emission (figure 1), Motorcycles do not contribute significantly to the Leq in agglomerations and even on rural roads (figures 2, 3 and 4), but their annoyance potential at the boundaries of urban locations is high.

United States Motorcycles Emissions standards History Motorcycles are regulated under section of the Clean Air Act, which calls for EPA to consider the need to achieve equivalent emissions reductions from vehicles, including motorcycles, as much as possible.

by 92%, passenger car noise by 83% and motorcycle noise by 95% [6]. Over the years, vehicle inte rior noise is significantly re duced in response to customer ex pectations.

What are the motorcycle exhaust noise limits in each state. Noise standards (for motorcycles or cars) vary from state to state. Below is a list of these standards, by state. This list is for informational purposes, and you should note that these laws change from time to time, so it's.

(Noise limits, emissions, ) Okay, I have contacted the 2 Swiss companies that certify motorcycle exhausts and the Swiss importer for Akrapovic. The two companies either didn't reply to my email, or said to contact them via telephone (2CHF/min, sure!), while the importer told me that the aftermarket pipe shouldn't exceed the original one's.

Characteristic values for noise emission (September ) Page 2 of 4. Figure 1: Example of a measuring surface with five measurement points for a small machine (l1 ≤ d, l2 ≤ d, l3 ≤ 2 d) for determining the sound power level in accor-dance with DIN EN ISO Figure 2: Measuring surface dimension LS as a function of measuring surface File Size: KB.

ENVIRONMENTAL PROTECTION DEPARTMENT. Guidance Notes. Application. or Motor Vehicle Exhaust Emission. nd Noise Emission Type Approval (For motor vehicle with design weight of not more than tonnes) Application form The application form consists of two parts, PART I and PART II.

PART I is the applicant’s information and PART II is information of the vehicle model for which type. Noise Emission Limits: Noise emission limits need to be set for motor vehicles, motorcycles and aircraft, and preferably incorporated in legal instruments.

The various directives provide that Member States may not set more stringent noise levels than those contained in the Size: KB. Keizer does a good job in describing the history of "noise" (as opposed to sound), and even touches a bit on how one person's noise is another person's pleasant sound when describing the "battle" between Sturgis bikers and Native Americans and with a few community members in Massachusetts versus the larger community's desire to hold a festival complete with by: California.

A noise limit of 92 decibels applies to any motorcycle manufactured before A noise limit of 88 decibels applies to motorcycles manufactured after and before ; 86 decibels applies to motorcycles manufactured after and before ; 83 decibels applies to motorcycles manufactured after and before ; 80 decibels applies to motorcycles manufactured after In regard to the impact of motorcycle noise on the hearing capabilities of the operator or passengers, it should be noted that noise levels at the position of the operator's or passengers' ear would be reduced as a result of source noise reduction, and thus some further reduction in impact would be expected.

Motorcycle Noise Emissions - The German Position - 4. GRB Informal Group Meeting / August Milwaukee. At the 40th GRB meeting in September an Informal Group has been established to revise ECE-R The target was to prepare a draft amendment to the existing regulation on the base of. A majority of these motorcycle aftermarket exhausts emit two-four-six or more times the 80 db(a) maximum noise emissions limit stipulated as the “minimum” safe level of noise emissions for the general public as per the Environmental Protection Agency and the World Health Organization (calculated via logarithmic scale).

(3) Street motorcycles must be designed, built and equipped so that, when properly maintained and used, they will not produce noise emissions in excess of the levels specified in paragraph (a)(1) of this section, for an Acoustical Assurance Period of one year or a distance of km ( mi) after the time of sale to the ultimate purchaser, whichever occurs first.

Reducing noise in the automotive industry Despite increased traffic, EU noise emission limits have not changed since As greater numbers of people are being affected by traffic noise, the European Commission has proposed to reduce the noise produced by passenger cars, light commercial vehicles, buses, light trucks, coaches, and trucks.

Between andthe U.S. EPA was so “concerned” about motorcycle noise emissions that the Agency pursued a policy to lower “total” motorcycle noise emissions from 83 dB(A) to 78 dB(A), but the EPA received complaints from Suzuki Motors who argued the cost effectiveness of manufacturing a motorcycle to comply with the 78 dB(A.

The Impact of Noise Pollution: A Socio-Technological Introduction explores the areas that contribute to the generation of noise in the environment. Also covered are the different aspects of human life that is being affected by daily exposure to noise. This current noise emissions limit (or cap) offers the minimum level of protection to the public.

Labeling. Once the motorcycle successfully passes the noise emissions test (Ja), two labels (one on the vehicle chassis, the other on the vehicle muffler) are required to be affixed in a .United States.

Office of Noise Abatement and Control. Proposed motorcycle noise emission regulations. Washington: Environmental Protection Agency, Office of Noise Abatement and Control, (OCoLC) Material Type: Government publication, National government publication: Document Type: Book: All Authors / Contributors: United States.

The practice of replacing factory systems with aftermarket "straight pipes" was targeted in book recently published by a nonprofit group called Noise Free America. It .