Stillness

Hi All, new here. I have been reading this forum and I come across someone mentioning about this tool. can anyone advise if I can raise the ANC level (active noise canceling) thru this app? Also can I program it to change to fresh air mode every 20mins and then turn back to Recirculation?

ionian

I have Carista device and used it on my Lexus for a couple of things. However the options are rather limited. I haven't used it for a while. I don't recall any features related to what you're looking for.

Stillness

Thank you for the info.

LexFinally

I went to CaristaApp.com. They give a partial list of the options Carista provides for your car. Confirming what ionian reported, they mentioned nothing about these two capabilities.

ANC works by listening through interior microphones for specific frequences of interior noise, then generating counter-sound through the stereo speakers. Chances are there really isn't anything more you could achieve by "turning it up" anyway; I've heard in the past that ham-handed execution of this feature, such as in Infiniti cars, can create unpleasant sensations of low-pitched sounds and pressure on the ears that are at least as fatiguing as the problem it's meant to address.

Stillness

Thanks for the feedback.

I learn that it can be disabled from this thread which leads me to think, I can turn it on and off or tune it higher (trying my luck) . See thread here Active Noise Control with Subwoofer - ClubLexus - Lexus Forum Discussion

E46CT

BTW, I've studied Lexus technical docs on the "ANC" and it's not as exotic as you think lol. It's not doing the same thing your headphones are doing.

All ANC on the 7ES does is cancel a small percentage of engine RPMs within a certain RPM range. That's it. Has nothing to do with ambient sound, road noise, etc. It has a pre-programmed sound that's tuned specifically for the engine. This is also evident when you have a sub hooked up, the sub will vibrate/pulse from like 1000-3000 RPM then cut off.

I actually tested it back to back with it disabled and enabled so even then i can't notice any difference and I have extremely sensitive and nuanced hearing. So yeah it's nothing really to write home about.

Stillness

Thanks E46CT. Very helpful info..

I was hoping to make the ES even more quieter. lol.

E46CT

Through Carista you can disable it. that's all you can do with it.

Stillness

That's good to know.

if u have some spare time, can u do a screenshot of the features available? The website only show some samples, I am looking to tweak;
1) Turn off the back row seat belt alarm - very annoying as it keeps beeping even when seat belt is on.
2) Fresh air mode default everytime engine start. or even better has a timer to turn on and off every 20 mins. ( I measure the Co2 level) and its high on recirculation. makes me very sleepy.

Thank you very much

E46CT

No, sorry.

ionian

I used it last year I made a change related to #1. I don't recall #2 was an option.

LexFinally

That's a very interesting comment. We had a recent thread where a car magazine's testing found that the ES supposedly had the worst interior air quality out of a large number of cars tested. This seems to merit a closer look.

Stillness

No worries - Thanks!

Stillness

That's good news. I am about to order the ord scanner and turn that beeping off. - thanks for the input.

Stillness

Yeah, I order the CO2 monitor from Amazon, and the Co2 level shoots up pretty fast.. It went from 400++ to 3000++ in 40 mins drive with air set to 2 bar (no passenger). According to several site, a good range should be around 1100ppm.

"ASHRAE (American Society Heating, Refrigeration and Air Conditioning Engineers) says the comfort limit for CO2 concentration is 700 ppm over the ambient level, which is approximately 400 ppm, for a total of 1100 ppm (0.11%)." CO2 buildup in vehicle cabins becoming a safety issue (sae.org)

When I switch to "fresh air mode" the CO2 level drop drastically from 3000++ ppm back to the ambient level of 400++ in 10mins. I measure that it drops about 1,100 ppm every 5 mins. I thought well if I will have to choose between high co2 level or Exhaust gas in highway, I would go with exhaust (at least I am not sleepy). Since the deadliest exhaust gas is the Carbon Monoxide, I bought a carbon monoxide monitor and start measuring with full "fresh air mode" for 1 hr on a busy highway 101. The result was 0 PPM detected (I guess the EPA smog annual smog test works!).

Below is the Carbon monoxide exposure risk factor

• 0-9 ppm CO: no health risk; normal CO levels in air.
• 10-29 ppm CO: problems over long-term exposure; chronic problems such as headaches, nausea
• 30-35 ppm CO: flu-like symptoms begin to develop, especially among the young and the elderly.
• 36-99 ppm CO: flu-like symptoms among all; nausea, headaches, fatigue or drowsiness, vomiting.
• 100+ ppm CO: severe symptoms; confusion, intense headaches; ultimately brain damage, coma, and/or death, especially at levels 300-400+ ppm

Carbon Monoxide:"The Silent Killer" | McAfee Heating and Air (mcair.com)

I have been switching to fresh air mode ever since. Also the SMOG sensitivity has no priority over temperature for the AUTO recirculation mode. If the temp is high, it will always stay on recirculation mode (I was hoping it will switch automatically to fresh air mode every 20 mins to clear the co2 based on no smog detected).