Media, Nissan shareholders, government officials, analysts
and some of the first customers to place reservations for Nissan LEAF
will get the chance to experience the benefits of this practical,
affordable and fun to drive all-electric car when they get behind the
wheel of the first production test units.
Nissan LEAF, is a 'new car' in every sense of the word and
redefines the driving experience, setting new standards in handling,
acceleration and comfort in its class. Nissan LEAF officially goes on
sale beginning in December.
Since the 100% electric, zero-emission concept vehicle was
unveiled last August at the grand opening of the new Nissan Global
Headquarters, the company has been continually refining Nissan LEAF for
the October start of production.
Among the enhancements to the test units is the "Approaching
Vehicle Sound for Pedestrians" system, which also will be used in the
Nissan Fuga hybrid, slated for sale in fall 2010.
(Click here to download the sounds.)
The system makes it easy for those outside to hear the
vehicle approaching, but the sounds do not distract the driver and
passengers inside. Thus, the needs of pedestrian safety, as well as
driver and passenger comfort, are met. The sound system is the first of
its type to be introduced by an automaker.
Nissan believes the 100 percent electric Nissan LEAF has the
potential to be the transformative beginning of a new approach to
personal transportation. No tailpipe emissions from this global vehicle
mean no CO2 or other gases released into the atmosphere.
In addition to reducing air pollution, Nissan LEAF and other
electric vehicles (EVs) reduce noise pollution, making them
transformative in yet another way. Unlike their gasoline-powered cars,
EVs and hybrids run quietly. Today's noisy traffic corridors have the
potential to possess an almost serene ambience if populated with cars
and trucks that are quieter.
While silence is golden, it does present practical
challenges. In response to public concern that quiet EVs and hybrids can
surprise pedestrians and the visually impaired as they approach, Nissan
has developed a set of distinctive sounds that will come standard with
Nissan LEAF to ensure a positive experience for drivers, passengers and
pedestrians alike.
In developing the sound system, Nissan studied behavioral
research of the visually impaired and worked with cognitive and acoustic
psychologists. After looking at applied original technology developed
to reduce vehicle noise and conducting tests in Japan and abroad, the
Approaching Vehicle Sound for Pedestrians system was created.
The sine-wave sound system sweeps from 2.5kHz at the high
end to a low of 600Hz, an easily audible range across age groups. Nissan
worked to avoid a sound range that would add unnecessary noise to the
environment (around 1,000Hz).
Depending on the speed and status (accelerating or
decelerating) of Nissan LEAF, the sound system will make sweeping,
high-low sounds. For instance, when Nissan LEAF is started, the sound
will be louder, so a visually impaired person would be aware that a
nearby car was beginning operations. And when a car is in reverse, the
system will generate an intermittent sound. The sound system ceases
operation when Nissan LEAF tops 30km/h and enters a sound range where
regular road noise is high. It engages again as Nissan LEAF slows to
under 25km/h.
The system is controlled through a computer and synthesizer
in the dash panel, and the sound is delivered through a speaker in the
engine compartment. A switch inside the vehicle can turn off sounds
temporarily. The system automatically resets to "On" at the next
ignition cycle.
Approaching Vehicle Sound for Pedestrians |
Nissan LEAF will be on sale in Japan, the United States,
Portugal and the Netherlands starting in December and in the United
Kingdom and Ireland starting February 2011. Nissan plans to begin mass
marketing Nissan LEAF in 2012.
Production will start in October at the Oppama plant in
Japan. The second half of 2012 will see production at the Smyrna, Tenn.,
plant in the U.S., followed by production in the UK at the Sunderland
plant in 2013. Annual Nissan LEAF production for Oppama is 50,000 units.
The Lithium-ion battery that powers Nissan LEAF will be produced by
Nissan's joint-venture with NEC, AESC (Automotive Energy Supply
Company). Originally planned annual battery production capacity at AESC
was 65,000 units including 54,000 units for EV. However, AESC plans to
increase annual battery production capacity for EV to 90,000 units by
2011, foreseeing an upward trend in future demand.
Note: The Approaching Vehicle Sound for Pedestrians system conforms to guidelines set by Japan's Ministry of Land, Infrastructure and Transport in its report, "Measures for dealing with the silence of hybrids and similar cars," released in January.