Electric Vehicles
Acoustic Solutions for Electric Vehicles
Ventac is an established name in the supply of innovative and high-performance noise control solutions to the Electric Vehicles industry.
Our experience, technical knowledge, and acoustic expertise in an ever-changing industry allows us to work in partnership with our clients to quickly identify and solve their noise control problems and deliver an effective result. Reduced noise would appear to be a “win” for electric acousticians in electric bus original equipment manufacturers (OEMs). Unfortunately, the new key challenge facing the industry is the variety of new high-frequency tonal noises, also referred to as whining noise.
The shift to electrified transport is growing at a rapid pace, and while much of the focus has been on passenger EV’s, electrifying large commercial vehicles will have a much greater impact on fighting climate change. Ventac is delighted to announce we have recently invested in cutting edge vehicle noise measurement equipment and sound quality analysis software. The software tool will allow for the precision and rapid sound quality analysis of complicated noise sources within electric vehicles. The rise of electric vehicles across all markets means that the acoustic challenge is now about sound quality and reducing high tones, instead of overall levels.
There are a vast number of opportunities within Electric Vehicles to achieve much lower levels of interior noise than is perceived by the manufacturers.
Acoustic Solutions:
- Optimised Acoustic Liners
- Compressible Liners
- Acoustic Trim Pieces
- Electric Motor Wraps
- Thermal Battery Wrap
Electric Motor Wraps – Reductions of over 15dB have been achieved.
Electric Motor Wraps are one of the solutions that may be used in treating tonal noises from electric bus and coaches. Reductions of over 15dB have been achieved on narrow band peaks following treatment of EV noise sources using Ventac’s electric acoustics motor wrap. This product is a response to the global rise of electric vehicles. These vehicles have their own set of acoustic problems and require new products to treat them. Powerful electric motors can be a source of intrusive tonal noise. The acoustic wrap is designed to fit tightly around an electric motor, minimizing the gaps where high frequency noise might leak through.
Contact our Acoustics Team to discuss your acoustic requirements on +353 (0)45 851500 or email info@ventac.com
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Engine Noise
The engine bay is considered a ‘hotspot’ for noise, sound pressure and structure-borne vibrations that are passed into the passenger cab and the external environment. Ventac sound absorbers perform well at the frequencies generated by diesel engines and solutions are treated to ensure they are tough enough to endure harsh environments.
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Firewall
A key route for noise through the tractor and can be difficult to treat due to the multiple of noise sources running through this area. Ventac’s Vehicle Test Program can determine the exact noise sources passing through the vehicle to design and engineer a effective treatment for these noise sources. Ventac firewall liner has high noise insulation properties and heat resistance, which is needed to withstand the hear from the nearby exhaust system.
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Cab Floor
It is key to ensure that the cab floor is sufficiently insulated as the wide flat area is prone to structural resonance. Cabs can be mounted on or fitted with Ventac rubber isolation mats and acoustic trims that are durable and aesthetically pleasing while also reducing interior sound levels.
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Cabin Enclosure
The glass enclosure of the vehicle cab can amplify noise due to reverberation. This can be intensified within the normal frequency of the cab. Additional noise sources such as vehicle acceleration and vibration can have a negative effects on comfort and the operators health and safety. Ventac’s tuned composite materials and product solutions are designed to address key noise issues in vehicle cabs, particularly at the speech frequency which is key for communication, comfort and concentration.
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Interior Trim
Tractor manufacturers must comply with existing standard requirements to place their machines on the market. Ventac sound absorption liners can mitigate reverberant noise, particularly at the speech frequency range, while also considering the interior aesthetics.
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Headliner
Comfort levels within the cab has a major impact on driver productivity. The roof panel can be treated with acoustic absorption and solutions to better isolate the sound levels and reduce the noise that is close to the operators head, increasing cabin comfort and reducing overall cabin noise levels. Ventac can offer design, engineering and material selection assistance for the noise reducing headliner solutions
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Exhaust Noise
Acoustic wraps can be used to reduce the noise levels emitted from the exhaust. Ventac solutions normally use a combination of absorptive and insulating materials that are thermally treated and durable enough withstand their environment
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Engine Noise
The engine bay is considered a ‘hotspot’ for noise, sound pressure and structure borne vibrations that are passed into the passenger cab and the external environment. Minimising the operators exposure to high noise levels, through addressing noise sources such as the engine bay and hydraulics, can significantly reduce the overall noise levels of the truck and ensuring compliance with strict noise regulations. Ventac sound absorbers perform well at the frequencies generated by diesel engines and Ventac also offer electric motor solutions to minimise annoying high frequency noise. Solutions are treated to ensure they are tough enough to endure and last in harsh environments.
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Cabin Noise
The glass enclosure of the vehicle cab can amplify noise due to reverberation. This can be intensified within the normal frequency of the cab. Additional noise sources such as vehicle acceleration and vibration can have a negative effects on comfort and the operators health and safety. Ventac’s tuned composite materials and product solutions are designed to address key noise issues in vehicle cabs, particularly at the speech frequency which is key for communication, comfort and concentration.
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Headliner Noise
A major part of increased productivity is focused on increasing comfort levels within the cab so that the operator can complete large applications and operations. The roof panel of the cab can be treated with acoustic absorption and barrier solutions to better isolate the cabin structure. Ventac sound absorbers reduce the noise that is close to the operators head and reduces overall cabin noise.
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Interior Trim
Reverberant noise, particularly at the speech frequency range can affect the interior comfort and sound levels of the cab, and is caused by modules such as the glass cab. Ventac sound absorption liners, tuned to these specific frequencies are one of the solutions included within our noise control kits used to address these sound levels.
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Hydraulics
Pump pressure, speed and size will have an effect on hydraulic noise and this generated noise can be amplified throughout the entire structure of the vehicle, its components and modules. These areas can react and create even higher noise sources, which has a negative impact on the overall sound performance of the vehicle. To effectively treat this area the noise path must be identified through Ventac’s Vehicle Acoustic Test Program so that the correct treatment can be identified.
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Engine Noise
The engine bay is considered an ‘hotspot’ for noise, sound pressure and structure borne vibrations that are passed into the passenger cab and the external environment. Ventac sound absorbers perform well at the frequencies generated by diesel engines and solutions are treated to ensure they are tough enough to endure harsh environments.
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Exhaust Noise
Acoustic wraps can be used to reduce the noise levels emitted from the exhaust. Ventac solutions normally use a combination of absorptive and insulating materials that are thermally treated and durable enough withstand their environment
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Environmental Noise
Vehicles operating in noise sensitive, residential or urban areas can emit unwanted and overpowering noise pollution into the surrounding environment. These noise levels can have a negative effect both on the surround environment in terms of noise pollution and on the health of the vehicle operator. Typically the engine bay and tyre noise are the main noise sources and can be treated using Ventac tuned composite materials.
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Cabin Floor
It is key to ensure that the cab floor is sufficiently insulated as the wide flat area is prone to structural resonance. Cabs can be mounted on or fitted with Ventac rubber isolation mats and acoustic trims that are durable and aesthetically pleasing while also reducing interior sound levels.
-
Cab Enclosure
The glass enclosure of the vehicle cab can amplify noise due to reverberation. This can be intensified within the normal frequency of the cab. Additional noise sources such as vehicle acceleration and vibration can have a negative effects on comfort and the operators health and safety. Ventac’s tuned composite materials and product solutions are designed to address key noise issues in vehicle cabs, particularly at the speech frequency which is key for communication, comfort and concentration.
-
Hydraulics
Pump pressure, speed and size will have an effect on hydraulic noise and this generated noise can be amplified throughout the entire structure of the vehicle, its components and modules. These areas can react and create even higher noise sources, which has a negative impact on the overall sound performance of the vehicle. To effectively treat this area the noise path must be identified through Ventac’s Vehicle Acoustic Test Program so that the correct treatment can be identified.
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Fan Noise
The fan noise is the dominant noise source and also generally tends to have other tonal characteristics that make it more disruptive, such as a ‘whizz’ noise. Ventac materials are tuned to the blade pass frequency to optimise the acoustic treatment and it tough enough to endure the high velocity airflow that also carries high levels of water and debris.
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Engine Noise
The engine bay is considered an ‘hotspot’ for noise, sound pressure and structure borne vibrations that are passed into the passenger cab and the external environment. Minimising the operators exposure to high noise levels, through addressing noise sources such as the engine bay and hydraulics, can significantly reduce the overall noise levels of the truck and ensuring compliance with strict noise regulations. Ventac sound absorbers perform well at the frequencies generated by diesel engines and Ventac also offer electric motor solutions to minimise annoying high frequency noise. Solutions are treated to ensure they are tough enough to endure and last in harsh environments.
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Cab Enclosure
The glass enclosure of the vehicle cab can amplify noise due to reverberation. This can be intensified within the normal frequency of the cab. Additional noise sources such as vehicle acceleration and vibration can have a negative effects on comfort and the operators health and safety. Ventac’s tuned composite materials and product solutions are designed to address key noise issues in vehicle cabs, particularly at the speech frequency which is key for communication, comfort and concentration.
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Environmental Noise
Vehicles operating in noise sensitive, residential or urban areas can emit unwanted and overpowering noise pollution into the surrounding environment. These noise levels can have a negative effect both on the surround environment in terms of noise pollution and on the health of the vehicle operator. Typically fan and brush noise are the main noise sources. Ventac tuned composite materials are selected to match sound absorption with the frequencies emitted from the fan.
