Passive Noise Cancellation Research (Plan)
- Steven Wang (Deactivated)
Objective:
Research for potential material which could be used in MSXIV to reduce noise.
Research Questions:
- Where in the car could generate loud sound?
- Rationale: To figure out where we should use noise cancellation; understand limitations in space and shape.
- What materials are used in car industry?
- Rationale: To figure out the safest way which is modifying existing products in the industry.
- What materials are used in the architecture industry?
- Rationals: To find a way which may be missed by the normal car industry
- Research on MSXIV
- Understanding if the material is practical
- Validation
- Conventional noise-canceling methods include thick insulation or specialized tires to minimize noise from driving over rough roads or uneven pavement. But these fixes can increase vehicle weight and drive down fuel efficiency.https://www.theverge.com/2019/1/9/18175748/bose-noise-canceling-system-car-ces-2019
- How to avoid that?
- Conventional noise-canceling methods include thick insulation or specialized tires to minimize noise from driving over rough roads or uneven pavement. But these fixes can increase vehicle weight and drive down fuel efficiency.https://www.theverge.com/2019/1/9/18175748/bose-noise-canceling-system-car-ces-2019
Goal:
-Find an ideal material which can be used in MSXIV
-produce a list of companies we can contact and get sponsorships from
Methodology:
Post-Up
Forced Ranking
Result:
RQ#1:
Where in the car could generate loud sound?
Electric cars are quieter than their internal combustion engine-having counterparts.The only noises EVs usually generate is caused by wind resistance or tire noises, and that is only at moderate to higher speeds.https://www.theverge.com/2019/9/16/20869035/electric-car-ev-fake-noise-nhtsa
With the absence of acoustic emissions from an operating internal combustion engine, the presence of high pitched tonal components from the electric traction motor can be pronounced in many driving conditions.The perception of tonal components appearing in a mix of random noise from wind and tires. https://www.diva-portal.org/smash/get/diva2:1011065/FULLTEXT01.pdf
Insights:
Three main aspects of noise:
From the engine: high pitched tonal
From wind
From tire
RQ#2: What materials are used in car industry?https://cars.usnews.com/cars-trucks/the-quietest-cars
2019 Ram 1500: better aerodynamics; Wind is directed away from the front wipers, resulting in less annoying “whirring” sounds that could enter the cabin.
2020 Lincoln Navigator: laminated front and side glass&active noise cancellation
2019 Honda Odyssey: acoustic spray foam
2019 Honda CR-V: triple-sealed doors, sealed-off pillars, extra insulation in the doors, and an acoustic sealed underbody; mirrors.
Buick Enclave: acoustic laminated glass, and a special noise-reducing suspension setup.
Things can be used to reduce noise:
Wind: Aerodynamic; acoustic laminated glass
Tires:triple-sealed doors; side glass
Sealed-off pillars
acoustic spray foam
RQ#3: What materials are used in the architecture industry?
Architecture sound control relies more on heavier materials and structures.
Acoustic sealing(around 25)
Could be an extra addition to fill in some holes which air can move caused by wires.https://www.youtube.com/watch?v=eHQbEsCgWt4
Acoustic spray foam:
Problem: There are website saying spray foam would do little work.
Noico and Dynamat products are undoubtedly some of the most effective sound deadening mats on the market.https://soundproofliving.com/noico-dynamat-review/
a special heat and noise blocking product(current top)
Problem: its description says it could block the low-frequency sounds from combustion engines; however, in MSXIV, the sound created by electrical motors might be high frequency just like all the other electric cars.
Acoustic laminated glass/side glass
FILLER TEXT
How to connect the car and make it less wobbly:
Weatherseal: fix holes which can cause large wind whistle
Advantage: Cheap! Looking legit!
