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wxxyz
Posts: 404
Joined: Mon Aug 03, 2009 10:08 pm

Nissan Leaf Sound Information Released

Fri Jun 11, 2010 1:25 pm

I received an email from a Nissan Representative this morning with this information on the sound that the Nissan Leaf will produce:

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.


Here's a video of the Nissan Leaf driving forward (along with the sound it makes)
assets/VSP_ApproachWIN.wmv

Here's a video fo the Nissan Leaf backing up (along with the sound it makes)
assets/VSP_ReverseWIN.wmv

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mwalsh
Posts: 9467
Joined: Thu Apr 22, 2010 10:10 am
Delivery Date: 05 Jan 2011
Leaf Number: 0213
Location: Garden Grove, CA

Re: Nissan Leaf Sound Information Released

Fri Jun 11, 2010 1:53 pm

Um, yeah, we know already.......

viewtopic.php?f=4&t=557
2011 Blue Ocean SL with 70,000 miles.
2015 pack under warranty 12/30/15.
Tinted windows.
Michelin MXV4 tires.
L1 EVSE upgrade.
FIAMM horns.
Superbright LED lighting.
2013 sun visors.
LED shifter.
Heated seats.
GT-R map lamp lenses.
AV L2 EVSE.

Bicster
Posts: 579
Joined: Wed Apr 28, 2010 8:18 am
Delivery Date: 26 Jun 2015
Location: Houston, TX

Re: Nissan Leaf Sound Information Released

Fri Jun 11, 2010 1:58 pm

I wasn't going to be the one to say it :lol:
Reserved on April 20, 2010 - Never purchased

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mwalsh
Posts: 9467
Joined: Thu Apr 22, 2010 10:10 am
Delivery Date: 05 Jan 2011
Leaf Number: 0213
Location: Garden Grove, CA

Re: Nissan Leaf Sound Information Released

Fri Jun 11, 2010 2:02 pm

:D
2011 Blue Ocean SL with 70,000 miles.
2015 pack under warranty 12/30/15.
Tinted windows.
Michelin MXV4 tires.
L1 EVSE upgrade.
FIAMM horns.
Superbright LED lighting.
2013 sun visors.
LED shifter.
Heated seats.
GT-R map lamp lenses.
AV L2 EVSE.

IceRaven
Posts: 17
Joined: Sat Jun 12, 2010 9:30 pm

Re: Nissan Leaf Sound Information Released

Sat Jun 12, 2010 9:53 pm

I was actually looking forward to a car that makes less noise pollution and this sounds much too loud and annoying (though maybe its been amplified in the video for demonstration)

Ive read it can be turned off/on but its always on by default on startup. I might turn it off but switch it on if theres a inattentive pedestrian in the way (and honking isnt appropriate) to let him know Im there.

Speaking of honking a low level honking button in addition to the typical horn would be great

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garygid
Gold Member
Posts: 12417
Joined: Wed Apr 21, 2010 8:10 am
Delivery Date: 29 Mar 2011
Leaf Number: 000855
Location: Laguna Hills, Orange Co, CA

Re: Nissan Leaf Sound Information Released

Sun Jun 13, 2010 8:07 am

One might use the speaker (if any) as a PA system: "Excuse me, please", "Sara, please move your bike", "Warning, car comming", and such.

It might also be possible to use it for custom "horn" sounds (mp3 files?): "Big Truck" on the freeway, tiny "meep, meep" in parking lots, etc.
See SOC/GID-Meter and CAN-Do Info
2011 LEAF, sold in 2015
2010 Prius, 2014 silver Tesla S
Nissan EVSE, mod to 240/120v 16A
PU: SDG&E
Solar PV: 33 x 225W -> 7 kW max AC
To Sell: X-treme 5000Li EV motorcycle

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garygid
Gold Member
Posts: 12417
Joined: Wed Apr 21, 2010 8:10 am
Delivery Date: 29 Mar 2011
Leaf Number: 000855
Location: Laguna Hills, Orange Co, CA

Re: Nissan Leaf Sound Information Released

Sun Jun 13, 2010 8:22 am

Although there are those who have always lived embedded in "noise", and cannot get to sleep in very quiet situations, ...
the "quiet" aspect of e-vehicles (of all sizes) is something many will come to find compelling.

Here, even the road (mostly freeway so far) noise is being reduced (over 90%, I believe) in some areas, both with surface grinding and smoothing, and special low-noise surfacing materials.

Going from a "treated" section of freeway to an "old" section ... is startling.
Yep, wakes the driver right up.

But, without the strong road noise and the "thump, thump, thump" of the lane markers, how will the blind drivers be able to stay on the road? :)
See SOC/GID-Meter and CAN-Do Info
2011 LEAF, sold in 2015
2010 Prius, 2014 silver Tesla S
Nissan EVSE, mod to 240/120v 16A
PU: SDG&E
Solar PV: 33 x 225W -> 7 kW max AC
To Sell: X-treme 5000Li EV motorcycle

bruceha2000
Posts: 25
Joined: Thu Jul 08, 2010 12:05 pm

Re: Nissan Leaf Sound Information Released

Fri Jul 09, 2010 1:23 pm

Yeah, that wouldn't be annoying at all would it? It will more than likely freak out a blind person as they won't have ANY clue what the he11 that noise represents. The back up one is especially dumb. Cars don't have backup beepers now (OK the Prius does but the people outside can only hear it if the windows are open) and shy the little boys with their fart can mufflers, you generally can't hear an ICE engine from behind a car.

I'm sure it would not be at all difficult to install a "shut off" switch in the speaker wires under the hood for under a buck. The engineering types will, I'm sure, provide a more elegant solution once the cars are delivered.
2004 Prius - 49 MPG
No Leaf - I live in Vermont, Nissan won't sell me one

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