Chimaera 450 noise levels
Discussion
Extract from UK Gov pages https://www.vehicle-certification-agency.gov.uk/fu...
So you could argue that (of course your car is unmodified
) , it had to meet the 1978 82 dB limit
Cars and Noise
The external noise emitted by passenger cars has been controlled since 1929 when the Motor Cars (Excessive Noise) regulations were introduced. New cars are now required to meet Europe-wide noise limits. These have been progressively reduced from 82 decibels (dB (A)) in 1978 to the current limit of 72 dB (A) established in 2016.
Information on the level of noise recorded for new models of cars at their type approval test is listed in the data tables which can be found at https://carfueldata.vehicle-certification-agency.g...
When looking at this information please note that off-road vehicles are allowed to be 1dB (A) louder and wheelchair accessible vehicles or armoured vehicles are allowed to be 2 dB (A) louder.
The noise levels quoted above are the maximum levels that are permitted for new vehicle types. Many vehicles produce lower levels of noise, and it is illegal to modify the exhaust system of a vehicle to make it noisier than the level recorded for that model at type approval.
A new EU regulation was introduced from July 2016. Regulation (EU) No 540/2014, phases in tighter noise limits over 10 years, together with a revised, more representative test procedure. By 2026 the limit for most new passenger cars will be 68 dB(A).
So you could argue that (of course your car is unmodified
) , it had to meet the 1978 82 dB limit Cars and Noise
The external noise emitted by passenger cars has been controlled since 1929 when the Motor Cars (Excessive Noise) regulations were introduced. New cars are now required to meet Europe-wide noise limits. These have been progressively reduced from 82 decibels (dB (A)) in 1978 to the current limit of 72 dB (A) established in 2016.
Information on the level of noise recorded for new models of cars at their type approval test is listed in the data tables which can be found at https://carfueldata.vehicle-certification-agency.g...
When looking at this information please note that off-road vehicles are allowed to be 1dB (A) louder and wheelchair accessible vehicles or armoured vehicles are allowed to be 2 dB (A) louder.
The noise levels quoted above are the maximum levels that are permitted for new vehicle types. Many vehicles produce lower levels of noise, and it is illegal to modify the exhaust system of a vehicle to make it noisier than the level recorded for that model at type approval.
A new EU regulation was introduced from July 2016. Regulation (EU) No 540/2014, phases in tighter noise limits over 10 years, together with a revised, more representative test procedure. By 2026 the limit for most new passenger cars will be 68 dB(A).
It appears that you will not be able to get the Chimaera through the noise test in Denmark and you will not be able to use it on a public road.
Here is your problem and warning from a Lotus forum. If that person is no longer allowed to use a 1990 Esprit turbo, then there is no way that you will be able to use a Chimaera. The Lotus is electric car quiet compared with a TVR!
https://www.thelotusforums.com/forums/topic/116764...
Here is your problem and warning from a Lotus forum. If that person is no longer allowed to use a 1990 Esprit turbo, then there is no way that you will be able to use a Chimaera. The Lotus is electric car quiet compared with a TVR!
https://www.thelotusforums.com/forums/topic/116764...
Thanks for the help so far.
I think the guy from the Lotus forum, is exaggerating quite a bit. If our car is unmodified, with a cat. Then there should be no problem. My problem is that the car is not type-approved in Denmark. but i am close to the goal, only need the noise-info, before the people of Copenhagen can enjoy a nice Chimeara.
I think the guy from the Lotus forum, is exaggerating quite a bit. If our car is unmodified, with a cat. Then there should be no problem. My problem is that the car is not type-approved in Denmark. but i am close to the goal, only need the noise-info, before the people of Copenhagen can enjoy a nice Chimeara.
Thanks for the help so far.
I think the guy from the Lotus forum, is exaggerating quite a bit. If our car is unmodified, with a cat. Then there should be no problem. My problem is that the car is not type-approved in Denmark. but i am close to the goal, only need the noise-info, before the people of Copenhagen can enjoy a nice Chimeara.
I think the guy from the Lotus forum, is exaggerating quite a bit. If our car is unmodified, with a cat. Then there should be no problem. My problem is that the car is not type-approved in Denmark. but i am close to the goal, only need the noise-info, before the people of Copenhagen can enjoy a nice Chimeara.
Not sure this will be of any help, but my 1998 French regisitered Griffith 500 has 92dB at 3940rpm on its registration document. The car is originally from the UK so the value could be coming from the european approval of the car at the time, maybe try to join the French TVR facebook group to see if anyone has a Chim 450 registered in France ?
LucyP said:
It appears that you will not be able to get the Chimaera through the noise test in Denmark and you will not be able to use it on a public road.
Here is your problem and warning from a Lotus forum. If that person is no longer allowed to use a 1990 Esprit turbo, then there is no way that you will be able to use a Chimaera. The Lotus is electric car quiet compared with a TVR!
https://www.thelotusforums.com/forums/topic/116764...
Job's comforter! Here is your problem and warning from a Lotus forum. If that person is no longer allowed to use a 1990 Esprit turbo, then there is no way that you will be able to use a Chimaera. The Lotus is electric car quiet compared with a TVR!
https://www.thelotusforums.com/forums/topic/116764...
Driving Noise: The measurement procedure to be used for passenger cars is now regulated uniformly throughout the EU. The corresponding regulations are named in Germany at § 49 StVZO. In simple terms, the vehicle must pass the measuring device at a certain distance with three quarters of the nominal speed (but max. 50 km/h) and accelerate fully. Depending on the gearbox, the measurement is carried out in second gear (four-speed gearbox) or in third gear (gearbox with more than four gears) [4]. Today, the pure sound pressure (phon) is no longer measured, but in dB (decibels) with the inclusion of a weighting filter ("A"), which takes into account the frequency dependence of the sensitivity of the human ear. A comparison of "phon" and "dBA" is therefore only possible to a limited extent. For motorbikes, "Uniform conditions for the approval of motorbikes with regard to their noise emission" apply throughout Europe.
In quite a few mid-range and luxury cars and almost all sports cars, the driving noise in the narrow range covered by the driving noise measurement is attenuated to a greater extent by mechanical flaps in the exhaust and thus kept in conformity with the limit value. Since these flaps are opened automatically in certain driving conditions (e.g. at higher engine speeds), the vehicle may actually be considerably louder than the official driving noise figure suggests.
Static Noise:
The driving noise is comparatively complicated to measure. Therefore, an additional value is given for the stationary noise. It serves as a reference point to provide quick and uncomplicated information during traffic checks as to whether the checked vehicle complies with the specifications or has possibly been tampered with. If the stationary noise measurement shows a considerable deviation from the value stated in the vehicle documents, there is a suspicion of manipulation of the engine or exhaust system, for example, and the authorities can order an (expensive) driving noise measurement. For classic cars built before 1980, the police must add 26 dB to the registered value if there is no letter after the standing dB figure in the letter. For younger vehicles with a P after the dB figure in the letter, only a 5 dB tolerance is added. Vehicles built before 1954 are not subject to a precisely defined limit; the general rule of § 1 StVO was that no "nuisance" could be caused. In addition, the "general state of the art" had to be observed in the construction of the vehicles.
The measuring microphone shall be placed at a distance of 50 ± 2,5 cm from the exhaust outlet at the same height, but at least 0,2 m above the ground and at a horizontal angle of 45 ± 10° to the direction of exhaust flow in such a way that the direction of maximum sensitivity indicated by the instrument manufacturer points towards the sound source. The angle of 45° shall be in the direction of least influence of other noise sources.
If there is more than one exhaust outlet, measure at the one that produces the higher noise level. If the exhaust ports are close to each other (double tailpipes), the measurement must be carried out as for a single tailpipe, but the port closer to the measurement microphone must be selected as the reference point. Measurements must be made on a firm, uncovered, preferably level surface that is free of sound-absorbing coverings (e.g. snow). There must be no acoustically disturbing objects within at least 2 m of the microphone. objects must be present.
Noise level and wind influence:
Noise and wind-induced pointer deflections must be at least 10 dB(A) lower than the measured values. A windscreen may be attached to the microphone.
number of measurements and measurement results:
Several - generally 3 - individual measurements shall be made. The measurement result is the arithmetic mean of the individual values rounded to whole dB(A).
Due to the tolerances of the measuring instruments, the interferences during the measurement and the scattering of measured values in vehicles of the same type, an uncertainty of the measurement results of 5 dB(A) is to be expected, which is to be taken into account when comparing with the corresponding type test values.
operating condition of the engine:
1. engines without speed governor
Engines without a speed limiter shall, for measurement without load, be brought to a speed equal to 3/4 of the engine speed at which the highest engine power is reached. This speed shall be set by means of a tachometer and kept constant while reading the show level.
2 Motors with speed limiters
For engines with a governor, the accelerator pedal of the idling engine shall be fully depressed and held in this position until the governor has stopped and the engine is running at maximum speed. After reaching the steady state, the sound level shall be read off.
For the purposes of this Directive, overspeed governors are devices whose governor speed is not more than 8% above the maximum power speed.
In quite a few mid-range and luxury cars and almost all sports cars, the driving noise in the narrow range covered by the driving noise measurement is attenuated to a greater extent by mechanical flaps in the exhaust and thus kept in conformity with the limit value. Since these flaps are opened automatically in certain driving conditions (e.g. at higher engine speeds), the vehicle may actually be considerably louder than the official driving noise figure suggests.
Static Noise:
The driving noise is comparatively complicated to measure. Therefore, an additional value is given for the stationary noise. It serves as a reference point to provide quick and uncomplicated information during traffic checks as to whether the checked vehicle complies with the specifications or has possibly been tampered with. If the stationary noise measurement shows a considerable deviation from the value stated in the vehicle documents, there is a suspicion of manipulation of the engine or exhaust system, for example, and the authorities can order an (expensive) driving noise measurement. For classic cars built before 1980, the police must add 26 dB to the registered value if there is no letter after the standing dB figure in the letter. For younger vehicles with a P after the dB figure in the letter, only a 5 dB tolerance is added. Vehicles built before 1954 are not subject to a precisely defined limit; the general rule of § 1 StVO was that no "nuisance" could be caused. In addition, the "general state of the art" had to be observed in the construction of the vehicles.
The measuring microphone shall be placed at a distance of 50 ± 2,5 cm from the exhaust outlet at the same height, but at least 0,2 m above the ground and at a horizontal angle of 45 ± 10° to the direction of exhaust flow in such a way that the direction of maximum sensitivity indicated by the instrument manufacturer points towards the sound source. The angle of 45° shall be in the direction of least influence of other noise sources.
If there is more than one exhaust outlet, measure at the one that produces the higher noise level. If the exhaust ports are close to each other (double tailpipes), the measurement must be carried out as for a single tailpipe, but the port closer to the measurement microphone must be selected as the reference point. Measurements must be made on a firm, uncovered, preferably level surface that is free of sound-absorbing coverings (e.g. snow). There must be no acoustically disturbing objects within at least 2 m of the microphone. objects must be present.
Noise level and wind influence:
Noise and wind-induced pointer deflections must be at least 10 dB(A) lower than the measured values. A windscreen may be attached to the microphone.
number of measurements and measurement results:
Several - generally 3 - individual measurements shall be made. The measurement result is the arithmetic mean of the individual values rounded to whole dB(A).
Due to the tolerances of the measuring instruments, the interferences during the measurement and the scattering of measured values in vehicles of the same type, an uncertainty of the measurement results of 5 dB(A) is to be expected, which is to be taken into account when comparing with the corresponding type test values.
operating condition of the engine:
1. engines without speed governor
Engines without a speed limiter shall, for measurement without load, be brought to a speed equal to 3/4 of the engine speed at which the highest engine power is reached. This speed shall be set by means of a tachometer and kept constant while reading the show level.
2 Motors with speed limiters
For engines with a governor, the accelerator pedal of the idling engine shall be fully depressed and held in this position until the governor has stopped and the engine is running at maximum speed. After reaching the steady state, the sound level shall be read off.
For the purposes of this Directive, overspeed governors are devices whose governor speed is not more than 8% above the maximum power speed.
the noise Limit (driving noise) inside the EU for cars registered 1996 to 2016 is 74dB(A)
1988-1995 the limit is 77dB(A)
in most EU reg documents (and not only recent docs) you will find the noise-level limits for "driving-noise" and "static-noise"
the best would be you ask somebody from your local MOT Center in Denmark if he can find limits in his database or from another Chimaera which was homologted in the past in Denmark. There should be somewhere a database .
just to give you some figures from some cars paperwork:
Friends 1998 500 Griffith: 98db(A) static, 74 driving
my former 1993 400 Chimaera:95 dbA static, 75 driving
1988-1995 the limit is 77dB(A)
in most EU reg documents (and not only recent docs) you will find the noise-level limits for "driving-noise" and "static-noise"
the best would be you ask somebody from your local MOT Center in Denmark if he can find limits in his database or from another Chimaera which was homologted in the past in Denmark. There should be somewhere a database .
just to give you some figures from some cars paperwork:
Friends 1998 500 Griffith: 98db(A) static, 74 driving
my former 1993 400 Chimaera:95 dbA static, 75 driving
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