Test method for determination of noise emitted by motorcycles

The test method for determination of sound emitted by motorcycles provides useful information aiming at meeting regulatory certification requirements; comparing different vehicle models; checking the sound comfort experience of the vehicle,; proactively controlling noise and quality during the production process of two-wheeled and three-wheeled motorcycles...

Overview of the test method for determining noise emitted by motorcycles

Test method name: National Standard TCVN 7882:2008 on road vehicles – Sound emitted by motorcycles – Requirements and test methods for type approval.

Test method:

ISO 9645:1990: Acoustics – Measurement of noise emitted by two-wheeled mopeds in motion – Engineering method [1]

Performed at: Test track site.

1. Objectives and test subjects

– Test objective

This standard specifies the requirements and test methods for noise in type approval for two-wheeled and three-wheeled motorcycles as defined in TCVN 6211 (motorcycles hereinafter referred to as vehicles).

The test method requires an acoustic environment that can only be obtained in a spacious open space. Such conditions generally exist in the following times:

• Vehicle measurements for regulatory certification;
• Measurements at the production stage;
• Measurements at official testing stations.

– Test subject

Two-wheeled and three-wheeled motorcycles ensuring the following conditions:

• The total mass of the driver and test equipment used on the motorcycle must be between 70kg and 90kg. If the total mass is not 70kg, additional mass must be placed on the vehicle to make up for it.
• During measurement, the vehicle must be equipped as normally used on the road (including cooling fluid, lubricating oil, fuel, tools, spare wheels, and driver).
• The tires must be of the correct size and inflated to the specified pressure for the motorcycle in an unloaded condition.
• Before measurement, the engine must operate under normal conditions regarding temperature, fuel, adjustment parameters; spark plugs, carburetor, and other parts must also work normally.
• If the vehicle has devices that are not necessary for its traction but are used while the vehicle is running on the road, those devices must have an operating mode consistent with the manufacturer's regulations.

– Noise limit

Noise limits are stated in the table below:

Two-wheeled vehicles		Three-wheeled vehicles
Maximum design speed, (km/h)	Limit value of noise level, (dB (A))
≤ 25	66	76
> 25	71

 

 

2. Experimental procedure

Implementation steps:

• Fully equip the vehicle testing site, equipment, tools, microphones, and test samples.
• Perform sample measurement.

+ Moving vehicle measurement method

+ Stationary vehicle measurement method

• Process and report results.

 

Role and – importance of the test method for determination of sound emitted by motorcycles

The test method for determination of sound emitted by motorcycles conducted by DASM Institute helps provide useful information, meeting the practical needs of customers and enterprises wishing to:

• Achieve regulatory certification.
• Compare different vehicle models.
• Check the vehicle sound comfort experience.
• Control noise, control quality during production, and optimize research and development of products, materials, spare parts, etc., related to noise emitted by motorcycles.
• Have an authentic basis to propose and implement solutions prioritizing components, details, products, etc., with improved techniques and technologies regarding noise emitted from motorcycles.

At the same time, DASM will conduct consulting and design work to create shape/structure/material solutions to efficiently and economically adjust customer test samples in a streamlined manner (in case standards are not yet met).

If previously you still had concerns, worries, and had to spend many fees for similar activities abroad, now you just need to contact DASM. The entire remaining process will be proactively and package-implemented by us in the fastest time to complete customer experience regarding us: DASM provides acoustic consulting services with truly superior quality, the most competitive prices in the industry, along with thoughtful and dedicated customer care policies.

Significance of acoustic testing services at DASM

Today's globalized commercial life opens up countless new markets and supply sources across five continents. Accompanied by it are international regulations and standards helping customers easily assess quality – trace product origin, and select suitable/superior items. In particular, they support manufacturers to continuously improve and perfect technology, techniques, raw materials, production methods, sales methods, etc.

DASM Institute is a pioneering, comprehensive, professional, and leading prestigious brand in Vietnam in the field of acoustics. On January 12, 2023, DASM was granted certificate No. 114/TĐC – HCHQ by the Directorate for Standards, Metrology and Quality (Ministry of Science and Technology), certifying registered multi-sector general testing activities in the Mechanical-Physical field (registration number: 707/TN – TĐC).

Our acoustic testing service provides customers with practical professional results to meet sustainability, standard performance, and optimal solutions – consulting – design adjustments for products and services. From there, you will update, meet, and adapt to constantly changing international standards to make a breakthrough in revenue, profit, and elevate your brand.

Customers wishing to perform the test method for determination of sound emitted by motorcycles please contact via Hotline for detailed consultation!