Characterization of the Automotive Interior Cabin Noise Research Proposal

Characterization of the Automotive Interior Cabin Noise - Research Proposal Example Consequently, interior trims such as the car-seats and roof covering play a very vital role in the observation of interior noise and vibrations specifically in relatively heightened frequencies (>400Hz). This therefore means that the automotive industry has had to focus on the redesigning the interior of this personal cars to make the cars as quiet as possible. The automotive industry has been compelled to enhance their interior trim products with better designs due to eco-friendly factors such as whether these products are recyclable, the fact that the noise and vibrating levels have the possibility of resulting to serious health issues and price of products. However, there is still a lot of research that need to be done in order to get a more profound understanding of the consequences of the interior trim design on the noise and vibrating levels. Once this improved and refined trim designs and concepts are recommended for the automotive industry, this need to enhance their interior trim products with better designs will become even more obligatory. Hence, this research paper is anticipated to deliver a practicable process which can estimate and optimize the interior cabin noise level for dissimilar interior trims and seating arrangement. In carrying out this research we first have to understand the effects of vehicle interior trims in minimizing interior cabin noise. In doing so, we will begin by establishing the noise characteristics. In establishing the noise characteristics of interior design, I will peg my research on a paper published by Jha and Priede which investigated the simplest mechanism of understanding how noise is generated in a car. This noise is majorly caused by the vibration of the cabin walls. While this research was carried out over 30 years ago the findings from this research are still applicable with the design and features of an ordinary modern day vehicle. Jha and Priede carried out experiments of internal noise spectra of a number of vehicles. The internal noise spectra of the vehicles were also done at contrasting speeds. The internal noise spectra was seen to elevate to an all-out level of 20 Hz and later decrease at a constant rate of averagely 25 Db per decade to a level exceeding 1 kHz. Although, the frequency at which the highest level of noise is experienced normally depends on the size of the car, the corresponding interior noise spectra for all personal vehicles as investigated by Jha and Priede are all alike. The rotation of the wheels are one of the major contributors of interior noise and vibrations whereby they result to noise peaks of about 20 Hz which in combination with various harmonics result to a lot of noise and vibrations within the car. The engine is also a major contributor of these noise and vibrations within the car whereby when an engine fires it produces harmonics of a low order that account for a frequency of about 100Hz. The second part of this research will be identifying the role of different trims in absorbing noise and vibrations produced within the cabin. The most commonly used trims are Acoustic Insulation materials. These materials that are applied in the reduction of noise and vibration levels within a personal car have the following mechanism; they first absorb the energy produced which is then transformed into heat energy. This transformed sound energy is reflected away from the vehicle. The acoustic insulation