Provided some FAQs for the commonly asked questions.
Qn 1: What material is used?
Ans : The material used is one of the soundproof product line by Superlon.
Qn 2: Will the material peel or degrade?
Ans : The material and corresponding adhesive are weatherproof (refer to http://www.superlon.com.my for detailed specs).
Qn 3: What is the recommendation for reduction of road noise? And how long does it take?
Ans : For a start, the usual package I'll recommend includes front wheel arches. It'll take 1/2 hour.
Qn 4: What are the other areas I can consider to reduce more road noise? And how long does it take?
Ans : If budget allows, you can include front floor plan and front 2 doors for better complement of each other in aid of reducing more road noise. It'll take 1.5 hours.
Qn 5: What is the recommendation for reduction of rain drop noise? And how long does it take?
Ans : The roof should be done. It'll take 1.5 hours.
Qn 6: What is the recommendation for reduction of engine noise? And how long does it take?
Ans : The bonnet can be done. It'll take 1/2 hour.
Qn 7: What is the recommendation to improve sound quality by the sound system? And how long does it take?
Ans : Depending on where your speakers are mounted, its recommended to do up the doors with speakers mounted. It take roughly 0.5 hour to do 1 door.
Qn 8: What is the weight added on if the whole car is done up? And how long does it take?
Ans : The total weight will NOT exceed 6KG. It'll take approximately 6 hours.
Saturday, May 26, 2007
Thursday, May 3, 2007
Wednesday, May 2, 2007
Friday, April 27, 2007
Sound Damping
Sound damping is essential to reduce resonant noise coming from vibrations from big panels of thin metal. Examples of big panels of thin metals on the car are roof and doors. Ever wondered why the rain noise in certain cars are louder and more irritating (e.g. Nissan Sunny) and the rain noise in some cars are much muffled (e.g. new BMW 3 series)? Heard of anyone who hit the chinese 'Gong' repeatedly? What happens when you grab the 'Gong' immediately after you hit it?
The answer is simple, our hands damped the 'Gong' immediately to reduce all the vibrations on the 'Gong' that produces the sound. The harder you grab the 'Gong', the faster the vibrations is reduced and the faster the sound is reduced. Applying this concept on the doors and roofs of the cars and we can effectively reduce the noise from the roof when it rains and the loss of sounds through the doors.
This implies that the heavy bitumen type of material is the best in damping. However, its insufficient if its just damping alone, as there are still noises intruding the car cabin due to lack of noise absorption. Which brings me back to promoting my soundproof material, it effectively dampens and absorbs any residual noise. It damps the roof as well as the bitumen by the use of mass and pressure created by the roof carpet (See illustration below).
In this way, the roof carpet pushes the 2 layers of soundproof material against the roof to increase the damping effect. At the same time, with the absorption factor in the Superlon foam, most of the residual noise is absorbed.
For the doors, another set of physics is working against the driver's ears. Without any soundproof on the door panels, vibrations set in from various sources. One major source of this is noise coming from the outside e.g. motorbikes beside your car. Another source of vibration is from the speakers' backblast. When the speakers are producing sounds, there is an almost equal amount of air column hitting the bare door panels, thus introducing vibrations to the car doors. To reduce these vibrations, the Superlon material works well to reduce and reflect the sound back into the car cabin, thus improving the bass and reducing the loss in sound energy, creating a better experience for the driver.
The answer is simple, our hands damped the 'Gong' immediately to reduce all the vibrations on the 'Gong' that produces the sound. The harder you grab the 'Gong', the faster the vibrations is reduced and the faster the sound is reduced. Applying this concept on the doors and roofs of the cars and we can effectively reduce the noise from the roof when it rains and the loss of sounds through the doors.
This implies that the heavy bitumen type of material is the best in damping. However, its insufficient if its just damping alone, as there are still noises intruding the car cabin due to lack of noise absorption. Which brings me back to promoting my soundproof material, it effectively dampens and absorbs any residual noise. It damps the roof as well as the bitumen by the use of mass and pressure created by the roof carpet (See illustration below).
In this way, the roof carpet pushes the 2 layers of soundproof material against the roof to increase the damping effect. At the same time, with the absorption factor in the Superlon foam, most of the residual noise is absorbed.
For the doors, another set of physics is working against the driver's ears. Without any soundproof on the door panels, vibrations set in from various sources. One major source of this is noise coming from the outside e.g. motorbikes beside your car. Another source of vibration is from the speakers' backblast. When the speakers are producing sounds, there is an almost equal amount of air column hitting the bare door panels, thus introducing vibrations to the car doors. To reduce these vibrations, the Superlon material works well to reduce and reflect the sound back into the car cabin, thus improving the bass and reducing the loss in sound energy, creating a better experience for the driver.
Monday, April 23, 2007
Noise barriers
To achieve the noise barrier result in automotive context, the noise must either be effectively contained or just being isolated from the car cabin. This effect can be achieved by using materials which are close-cell structured to prevent any 'leakage' of noise into the problem area.
This concept can be applied to the following parts of the car:
1) 4 doors to reduce exterior noise e.g. motorbike exhaust noise.
2) Steering wheel column and front floor to reduce exterior noise e.g. engine noise and front undercarriage noise.
3) Wheel arches to reduce road noise i.e. the noise created by the friction of the tyres with the road.
There is unique feature of this material by Superlon such that it helps to contain the sound produced by the speakers to reduce energy loss. This helps to enhance the bass of the sound and reduce the need to tune up the sound level on the headunit.
This concept can be applied to the following parts of the car:
1) 4 doors to reduce exterior noise e.g. motorbike exhaust noise.
2) Steering wheel column and front floor to reduce exterior noise e.g. engine noise and front undercarriage noise.
3) Wheel arches to reduce road noise i.e. the noise created by the friction of the tyres with the road.
There is unique feature of this material by Superlon such that it helps to contain the sound produced by the speakers to reduce energy loss. This helps to enhance the bass of the sound and reduce the need to tune up the sound level on the headunit.
What is Soundproofing?!
From what Wiki suggests,
Soundproofing is any means of reducing the intensity of sound with respect to a specified source and receptor. There are several basic approaches to reducing sound: increasing the distance between source and receiver, using noise barriers to block or absorb the energy of the sound waves, using damping structures such as sound baffles, or using active antinoise sound generators.
*underlined keywords will be explained in further posts
Soundproofing affects sound in two different ways: noise reduction and noise absorption. Noise reduction simply blocks the passage of sound waves through the use of distance and intervening objects in the sound path. Noise absorption, on the other hand, operates by transforming the sound wave. Noise absorption involves suppressing echoes, reverberation, resonance and reflection. The damping characteristics of the materials it is made out of are important in noise absorption.
Subscribe to:
Posts (Atom)
