Applications: Vehicle & Motor Sport Noise Measurement
The noise from vehicles such as cars, buses and trucks is wide spread with many people being affected by these noise sources in their daily lives. All modern vehicles will be designed to meet strict safety and emissions standards as well as noise output levels. All vehicles sold in the EU must comply with a range of noise directives to ensure that they meet these specified noise levels when they are sold and many countries enforce regular checks over the life of the vehicle.
Motor Sport noise is a often a source of enjoyment for those taking part and for spectators. The impact of motorsport activities on the surrounding environment is also of major concern to many people who live near to venues as well as to those operating the circuits, tracks and venues.
Vehicle Noise Measurements
ISO 5130:2007 is a measurement standard that describes the method for testing the noise from the exhaust of vehicles. This is a commonly used standard that is employed to ensure that car, trucks and any other types of road vehicles comply with their specified noise outputs levels.
ISO 5130:2007 requires three consecutive measurements to ensure repeatability. These measurements are taken at a specified engine speed, or RPM, and the maximum sound level produced during the test is taken. Once three valid measurements have been made, the highest is taken and used as the valid result.
Motor Sport Noise Monitoring
Our noise measurement instruments are used at high profile circuits and venues around the world, helping owners, operators, teams and officials comply with noise limits and regulations.
With a range of noise measurement tools including drive-by test systems with permanently installed and portable monitors for continuous measurement of vehicles, to handheld sound level meters for pre and post race scrutineering, we can help you monitor and control your noise levels on track, in the pits and in the surrounding environment. We can also help you measure the noise exposure of your employees to make sure that they are not at risk from hearing damage.
Cirrus has supplied noise measurement instruments to a wide range of customers in a number of different arenas of motorsport including:
> MSA, FIM & FIA Scrutineers
> Clubs & Associations
> Manufacturers & Designers
> Series Organisers & Bodies
> Circuit Operators & Owners
> Race Teams
> Corporate Motorsport Venues
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Drive-by Noise Measurement Systems for Real-Time Noise Control
Drive-by noise measurement systems are becoming increasingly useful as more circuits are required to monitor, measure and control their noise output into the surrounding environment. Static testing of vehicles will often identify those which are well over the limit but it is often the case that rear engined cars may fail static testing whilst being amongst the quiest on the track, and vice versa for front engined cars.
Drive-by measurements can give a circuit a real time display of the noise produced by vehicles passing the test point which in many cases will identify those which will cause compliants to be raised. Systems can also be provided to automatically measure and record exceedences of preset noise limits providing circuit operators and enforcement bodies with an accurate measurement of the noise of individual vehicles.
Cirrus Environmentalhas a range of noise monitors and software packages that can be used in this environment and these systems can be configured and customised to meet the requirements of a particular circuit or venue. For more details of Drive-by noise measurement systems or their applications, please contact Cirrus Research plc.
ISO 5130 Vehicle Noise Measurements
ISO 5130:2007 requires three consecutive measurements to ensure repeatability. These measurements are taken at a specified engine speed, or RPM, and the maximum sound level produced during the test is taken. Once three valid measurements have been made, the highest is taken and used as the valid result.
The microphone can be placed at the specified measurement position, typically 45 degress and 0.5m from the exhaust of the vehicle under test. The CK:261S Measurement Kit includes a positioning template which can be used to ensure that the microphone capsule is set at the correct angle and distance from the vehicle exhaust.
The tripod included with the kit allows the sound level meter and microphone to be set at the correct height from the ground. The remote control allows the user to control the measurements whilst ensuring that the engine is at the correct RPM for the test. The CR:261S can be supplied with a range of accessories and optional extras that allow the instrument to be used for various different applications.
