If an electric vehicle low-speed warning sound system is to be installed on an electric vehicle, requirements should first be made for several aspects such as vehicle speed, sound pressure, frequency, and pause switch. Only when these aspects meet the standards can the installation of the electric vehicle low-speed warning sound system achieve excellent results. What are the specific requirements for the aspects mentioned earlier? Please refer to the following article for more information.

◆ Vehicle speed requirements
According to research, the main components of the noise emitted by vehicles vary at different speeds. The sound emitted when the vehicle speed is below 20 kilometers per hour is mainly the sound of the vehicle's power system, that is, the rapid engine part. At this time, the sound of the vehicle is relatively low. When the vehicle speed exceeds 20 kilometers per hour, the noise generated by the direct contact between the tires and the ground becomes much higher, which is the main component of vehicle noise. Moreover, the noise of electric vehicles at this time is basically close to the noise emitted by traditional vehicles at this speed. Based on this, the effective operating speed range of the low-speed warning sound system for electric vehicles is 0 to 20 kilometers per hour.
◆ Sound pressure level requirements
It is mainly affected by environmental background noise. The main purpose of installing an electric vehicle low-speed warning sound system is to enable other pedestrians to clearly identify the low-speed electric vehicle, so the sound pressure level of the sound it emits should be set according to the spectral distribution of the background noise.
◆ Frequency requirements
The main consideration is that the sound should be well recognized by people of all ages. Due to the fact that elderly people may experience some degree of hearing loss from high-frequency sounds, specific requirements have been established regarding low-frequency aspects.
◆ Frequency shift requirements
The requirement for sound frequency offset is made to facilitate pedestrians and other road users to clearly identify the operating status of vehicle speed, and its main principle is to simulate the Doppler effect.
◆ Pause switch function
It is a switch set by the driver to actively turn off the low-speed warning sound system of Weishan electric vehicles, in order to avoid excessive noise and interference with the surrounding environment when driving to certain areas with few vehicles or people, or when it is quiet late at night.
The small knowledge about the technical requirements of the low-speed prompt sound system for electric vehicles has been shared with you here. I will continue to update you in the future. I hope the content shared today can help you better understand the relevant knowledge. The sharing ends here. Thank you all for your continued attention and support.