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Quiet Vehicle Sounder (AVAS)

Known as an Acoustic Vehicle Alerting System (AVAS)
The Quiet Vehicle Sounder warns vulnerable road users of an approaching electric/hybrid vehicle.
Since 2010, Brigade has been involved in the QRTV (Quiet Road Transport Vehicles) working group to establish requirements for a UN standard.
Brigade has developed a multi-frequency Quiet Vehicle Sounder, integrating the patented bbs-tek® technology. bbs-tek® uses a wide range of White Sound® frequencies. This enables anyone in the direct path of the vehicle to instantly locate where and in what direction the sound is coming from and take evasive action if required. There is no safer alternative.

Quiet Vehicle Sounder (AVAS)

backeye®360 kit with 4 cameras, ecu and a monitor


QVS Quiet Vehicle Sounder (AVAS)


Part Number

QVS-001-75 5385
  • 12-24Vdc
  • IP68 Speaker
  • IP30 ECU
  • Size Speaker (WxHxD): 120 x 135 x 120mm
  • Size ECU (WxHxD): 93 x 26 x 185mm
  • 2 year warranty

  • 1 x Speaker
  • 1 x ECU
  • Warns pedestrians and other VRU’s that a quiet vehicle is approaching
  • Combined multi-frequency bbs-tek® technology and tonal sounds
    – Multi-frequency sound
    – Directional and locatable – The sound is only heard in the hazard zone.
  • Front speaker system
  • Pitch and volume increase with vehicle speed to mimic an internal combustion engine
  • Operational below speeds of 20MPH
  • Front sounder operational when ignition activated (silenced when parking brake applied)
  • Uses Tachograph speed signal**
  • Sounder unit: Speaker
  • Max Current: 0.1 Amps
Durability & Standards
  • Mechanical vibration: 10G
  • Operating temperature:
    -30 to +70°C
  • CE marked
  • E-Marked: UNECE R10 compliant
  • FCC approved
  • IC Marked
  • UNECE R138 compliant
  • 49 CFR Part 571 and 585 Federal Motor Vehicle Safety Standards compliant**
    * QVS helps achieve compliance for the vehicle.
    ** If your vehicle is not equipped with a Tachograph, please contact us for alternative installation methods
Product Data
Model Product Data
QVS-001-75 View data

The Benefits of using

Acoustic Vehicle Alerting System (AVAS)

Warns pedestrians

Warns pedestrians and other VRU’s that a quiet vehicle is approaching

Patented technology

bbs-tek® patented technology – Multi-frequency sound – Directional and locatable – The sound is only heard in the hazard zone

Automatic volume

Pitch and volume automatically increases with vehicle speed to mimic an internal combustion engine

Cut Out

Sound cuts out at 30 km/h

The Problem With Silence

Without an Acoustic Vehicle Alerting System (AVAS), electric and hybrid vehicles are almost silent; they are only audible once they have built up some speed (approximately 20kph) when wind and road noise generate enough sound that they can be heard. Studies have concluded that electric and hybrid vehicles pose a danger to vulnerable road users (VRU) and increase the risk of incidents with pedestrians by up to 80%. Sound is an important contributor to road safety for pedestrians, not only for the blind or visually impaired.

Brigade’s Quiet Vehicle Sounder creates a “sssshhhhh” sound which is gentle on the ear and dissipates quickly once the vehicle has passed, meaning it can only be heard in the danger zone (0-30 km/h). People living and working in the surrounding areas will not be impacted by unnecessary sound, reducing the impact on people's health.

Legislation affecting quiet vehicles

Both the USA and the EU are introducing standards to ensure minimum sound requirements for electric and hybrid vehicles to protect VRUs. An Acoustic Vehicle Alerting System will need to be fitted to make electric or hybrid vehicles “sound similar” to vehicles with combustion engines when traveling at low speeds.


NHTSA 49 CFR Part 571 and 585
From July 2019, all new hybrid and electric vehicles to be sold in Europe will need an acoustic vehicle alerting system to emit sound when travelling at low speeds. From September 2020, all hybrid and electric vehicles in USA will need an acoustic vehicle alerting system to emit sound when travelling at low speeds.

Award Winning Solution

Living Environment Award

Sound, Vibration and Air Quality conference, Hoevelaken, Netherlands

Brigade Electronics won a Living Environment Award at the 22nd edition of the Sound, Vibration and Air Quality conference in Hoevelaken, Netherlands. Brigade’s Quiet Vehicle Sounder (QVS), won the award in the product innovations category presented by former Minister of Housing, Spatial Planning and the Environment, Jacqueline Cramer.

Innovation Award 2018

CLEPA Awards 2018

Brigade Electronics has won a CLEPA Innovation Award in the SME Safety Category for its Quiet Vehicle Sounder (QVS) Acoustic Vehicle Alerting System. Organized by CLEPA -The European Association of Automotive Suppliers – the awards celebrate outstanding achievements in the automotive supply industry by recognizing innovation in the fields of environment, safety, connectivity, automation and cooperation.

“At Brigade it’s our mission to improve road safety, so we are absolutely thrilled to receive this award and be recognized for the important work we do in helping to prevent collisions and save lives” Philip Hanson-Abbott, Managing Director, Brigade Electronics

Noise Abatement Society

John Connell Innovation Awards 2017

Brigade Electronics won the John Connell Innovation Award thanks to the Quiet Vehicle Sounder's use of broadband sound. Brigade patented bbs-tek® broadband sound is easier for pedestrians to locate than pure tone sounds, producing a non-invasive sound that quickly dissipates.

Gloria Elliott, Noise Abatement Society Chief Executive, said: “NAS congratulates Brigade on its ground-breaking electric car sounder innovation which will help protect pedestrians as well as the aural environment.”

Quiet Vehicle Sounder

Product Resources

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Product Data

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Case Studies

FM Conway Endorse QVS

FM Conway Endorse QVS

Few companies across construction have taken to addressing environmental conservation like Conway have.A recent £7 million investment in their fleet has shown the forward-thinking business add electric vans to their London sites in a bid to tackle high emissions in a...

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University of Birmingham Adopts QVS

University of Birmingham Adopts QVS

As you enter the grounds of the University of Birmingham, you will notice the great lengths they are going to, to provide a sustainable environmentally friendly campus.Looking after the environment has always been at the centre of their focus and the green initiative...

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