EVs good for health

Electric vehicles (EVs) are not only good for the environment with low to zero emissions, but studies show their quietness is a benefit too.

With traffic noise now ranking second among the most impactful environmental threats to public health, Nissan Asia & Oceania has undertaken a sound measurement experiment in urban-Asia to raise awareness about how 100% electric vehicles could help address this.

According to the World Health Organisation (WHO), long-term exposure to high environmental noise levels such as traffic, above 53 decibels (dB) can result in adverse health effects such as elevated blood pressure, coronary artery disease, hearing loss and even heart attacks.

Noise levels across Asia and Oceania’s major cities, including Bangkok, Ho Chi Minh City, Jakarta, Hong Kong, Manila, Melbourne, Singapore and Seoul average 76dB – almost four times louder than those recommended by WHO.

Noise at these levels is scientifically proven to affect the health of a city’s residents over time and are equivalent to the noise from a ringing alarm clock (about 80dB). Besides health benefits, decreased levels of noise pollution also brings auxiliary advantages, such as fewer road rage instances, increased cognitive performance and productivity.

To educate audiences on this growing health concern, Nissan measured and compared the sound levels of a standard urban street to that of a street with the sound level of a 100% EV, using a sound level meter.

The results show noise levels peaking at above 90dB on the street, as compared to the running noise of a Nissan Leaf powertrain at 21dB, even quieter than a library (30db).

When contrasted against the average noise of a stationary petrol or diesel engine at around 76dB, EVs are shown to present a viable option to help decrease traffic noise pollution. The benefits at a societal level can include higher property values and increased levels of pedestrian street activity and social interaction.

“The rate of urbanisation in Asia is set to increase, making noise pollution an important issue that we can unite to reduce,” Nissan Asia & Oceania regional senior vice-president Yutaka Sanada says.

“As this small test indicates, 100% electric vehicles like the Nissan Leaf’s zero emission, quiet engine has the strong potential to positively improve environmental concerns for societies in Asia and Oceania.

“As we journey into the future, Nissan will continue to transform the way vehicles are driven, powered, and integrated, aiming to add value to inspire liveable and happier cities of the future.”