11 Oct Proinsur and Andaltec develop an accoustic system for electric vehicles combining car horn and low speed sound emitter
Andaltec Technological Centre is working together with the Martos-based company Procesos Industriales del Sur (Proinsur) in order to develop an innovative acoustic system for electric vehicles. This R&D project is supported by the Spanish Centre for the Technological and Industrial Development and it is focused on the creation of a completely novel device, since it will combine two functions: car horn to prevent and avoid pedestrian collisions, and an artificial sound emitter, sounding similar to combustion engines. Hence, this project is the answer to the European Union regulation which, since 1st July 2021, requires all electric vehicles, whose engines are very silent, to emit a sound when they are going at low speeds in order to alert pedestrians about their presence.
This sound, which can’t exceed 65 decibels, must stop whenever the car goes faster than 20 kilometres per hour. The project displays great complexity, since the emitted sound must change frequency as the motor accelerates. This issue entails the design and implementation of a management digital system to control this functionality. Similarly, the European regulation also requires electric vehicles to add a distinctive sound when travelling in reverse.
The device must be placed outside, in the front of the vehicle, so it has to pass strict durability tests required by both European regulations and automotive manufacturers. Thus, the Engineering, Projects, Lab and Electronics areas within Andaltec are involved in this initiative, so they are able to offer a comprehensive service in the project’s technical development.
Daniel Aguilera, Head for Business Development in Andaltec, states that this innovative acoustic system counts with several advantages, since it combines three functionalities in a single device: car horn, low speed sound emitter and reverse acoustic warning. It also allows for the suppression of the traditional car horn, which implies savings for automotive manufacturers, achieving some weight reduction at the same time. Lightweighting is one of the top priorities for electric vehicles in order to reduce energy consumption and extend travel range. “The Spanish Centre for the Technological and Industrial Development granting us this project proves that companies which opt for innovation and finding new market niches obtain good results. Andaltec will always be there to support them in that endeavour”, as he asserts.