02 · What Is AVAS & Why It Exists
What Is an Acoustic Vehicle Alerting System(AVAS)?
An Acoustic Vehicle Alerting System (AVAS) is an external system comprising the use of sound to be triggered in electric automobiles (EVs) and hybrids made up of electricity and gases (HEVs). It is meant to ensure that the sound of these silent cars can be heard by pedestrians and airline riders.
Acoustic Vehicle Alerting Aystem AVAS is not only a regulatory mandate but it remains an essential innovation, which can bring together three concepts: safety, technology, and sustainability. AVAS is a compromise between silence and consciousness, which makes electric vehicles come out safe and green. With the increased number of electric vehicles on the road worldwide, AVAS will be used to create the soundscapes of the new cities.
Global Regulatory Requirements
03 · Working Principle
Solving Acoustic Vehicle Alerting System Issues: A Guide
Have problems with acoustic vehicle alerting system? Discover solutions and tips for improving safety and performance in the most practical guide.
Common Issues
Despite the importance of AVAS, there are several common problems that can occur with this system, which can impact the quality and reliability of the system.
The Role of Technology
Advancements in technology have a pivotal role to improve the performance and reliability of AVAS.
Future Trends
The future of AVAS is full of a number of exciting trends that promise to help improve the safety of vehicles and pedestrians.
04 · Key Parameters
AVAS Speaker Specifications That Matter
| Parameter | Typical Range |
|---|---|
| SPL Output | 85-105 dB @ 1m, 1W |
| Frequency Range | 500 Hz – 5 kHz |
| IP Rating | IP67 minimum |
| Operating Temp | −40°C to +85°C |
| Input Power | 10 – 40W continuous |
| Impedance | 4Ω or 8Ω |
| Vibration | ISO 16750 / MIL-STD-810 |
Product Datasheet
Full electrical and mechanical specifications for the BESTAR AVAS speaker series.
View Products05 · Application Scenarios
Where AVAS Is Required and Used
Every EV and HEV platform has distinct acoustic requirements. The vehicle type determines duty cycle, SPL target, integration path, and which regulation governs the system.
06 · Selection Process
How to Select the Right AVAS Solution
This blog can offer a systematic outline of the process of AVAS selection that an OEM engineer and program manager undertakes. The steps are focused on one decision point; targeting market compliance to reliability at component level.
Step 01
Identify Your Target Market-Global Compliance First
Step 02
Clarify Your Vehicle Type-Packaging and Propagation
Step 03
Define the Sound-Safety Function and Brand Identity
Step 04
Select the Integration Architecture
Step 05
Select the Speaker or Exciter-Physical Reliability
Not sure which configuration fits your platform? BESTAR's acoustic engineers review your application and recommend a complete AVAS solution within 24 hours.
Speak with Our Engineer07 · Deep-Dive Articles
Explore Every Dimension of AVAS Technology
Each blog in this cluster covers a specific technical or commercial aspect of AVAS in full depth. Start with whichever topic is most relevant to your current program stage.
How Does AVAS Work? Step-by-Step Explained
AVAS is not a device. It is a sequence of elements, which combine. All the parts perform only a single task, and the quality of the final product is based on the proper functionality of all the links in the chain.
AVAS Applications in Electric and Hybrid Vehicles
Passenger BEVs, PHEVs, commercial vehicles, micro-mobility, and AGV applications.
Read Article →How to Design AVAS Sounds: Key Principles
Regulatory constraints, brand identity, pitch mapping, psychoacoustic principles.
Read Article →AVAS System Architecture: MCU, CAN Bus and Speaker Integration
Hardware topology, communication protocols, domain controller integration.
Read Article →AVAS and Sensor Fusion: Enhancing Pedestrian Safety with ADAS
Context-aware AVAS using camera, radar, and LIDAR data for adaptive sound.
Read Article →Designing High-Reliability AVAS Speakers: Waterproof and Automotive Grade
IP67, thermal tolerance, vibration resistance for front-end vehicle mounting.
Read Article →Lightweight AVAS Solutions for Micro-Mobility and Urban EVs
Size, power, and cost constraints for e-bikes and L-category vehicles.
Read Article →Directional and Multi-Band AVAS: Reducing Urban Noise Pollution
Beam-forming, directional acoustics, and adaptive output to minimize city noise.
Read Article →Directional and Multi-Band AVAS: Reducing Urban Noise Pollution
Beam-forming, directional acoustics, and adaptive output to minimize city noise.
Read Article →08 · Product Series
Find Your AVAS Series
BESTAR organizes its AVAS portfolio around vehicle application and performance priority. Each series is optimized for a distinct platform requirement — not just a product number.
High SPL
Maximum output for commercial vehicles, buses, and high-ambient-noise environments. Extended frequency range for complex brand sound profiles.
View Series →Compact Passenger
Slim profile for tight bumper integration on passenger BEVs. Full R138 and FMVSS 141 certified compliance package available on request.
View Series →Micro-Mobility
Ultra-lightweight, low-power AVAS for e-bikes and L-category vehicles. Minimal current draw, compact bracket mounting.
View Series →OEM Custom
Full custom development for brand-specific sound signatures — acoustic tuning, test certification, and production compliance documentation.
Request →09 · FAQ
AVAS FAQ: Regulations, Installation and System Selection
A speaker on the AVAS is mounted at the front bumper in the majority of vehicles. The AVAS speaker is usually mounted in front of the vehicle, then replicating the sound synthesis based on the speed, load, and throttle of the vehicle. Placement should also take into consideration the reduction of AVAS sounding into the car cabin.