In today's automotive world, the Acoustic Vehicle Alerting Systems (AVAS) play a crucial role in enhancing safety on the roads, especially for electric and hybrid vehicles that are relatively quiet at low speeds.

The AVAS is designed to work in specific situations. Firstly, when the electric or hybrid vehicle is moving at low speeds, typically below a certain threshold (such as 20 km/h in many regulations). This is because at low speeds, these vehicles produce very little noise, making it difficult for pedestrians, cyclists, and other road users to detect their approach. The AVAS emits an audible sound to alert those around the vehicle of its presence, reducing the risk of collisions and improving overall safety.

For example, in a crowded parking lot where there are many pedestrians walking around, an electric vehicle equipped with AVAS will emit a sound as it moves slowly through the area. This sound serves as a warning to pedestrians, allowing them to be aware of the approaching vehicle and take necessary precautions. Similarly, in residential areas or narrow streets where the vehicle speed is likely to be low, the AVAS comes into play to ensure the safety of people in the vicinity.

During reverse maneuvers, the AVAS also activates. When the vehicle is in reverse gear, regardless of the speed, the system emits a distinct sound to warn those behind the vehicle that it is moving in the opposite direction. This is particularly important as visibility may be limited during reversing, and the audible warning helps prevent accidents and damage.

In addition to these common scenarios, the AVAS may also be triggered in other situations where the vehicle's quiet operation could pose a potential hazard to others on the road. The specific working conditions and parameters of the AVAS are usually defined by relevant regulations and standards in different countries and regions to ensure consistent and effective safety measures.

In conclusion, the Acoustic Vehicle Alerting Systems work when electric and hybrid vehicles are operating at low speeds or during reverse maneuvers. By emitting audible warnings, these systems significantly enhance the safety of both the vehicle occupants and other road users, helping to prevent accidents and create a more aware driving environment.

As for Yueda Electroacoustic Equipment as the manufacturer of the AVAS product, we have several advantages in the production of this product. We have advanced technology and production processes, which ensure the high quality and reliability of the AVAS. Our R & D team is constantly innovating and improving the product to meet the diverse needs of the market and customers. We also have strict quality control systems to guarantee that every AVAS product that leaves our factory meets the highest standards. Moreover, with years of experience in the electroacoustic field, we have a deep understanding of the industry and can provide professional and customized solutions to our customers, making our AVAS products stand out in the market.