Is it possible to change the microphone's level? If it is, how?

Thanks.

 

Are you talking about the HFL microphone that is used for Bluetooth phone calls? There is no way to change the volume/sensitivity of the HFL mike. Someone else here had a similar question last week. I think the answer was that, if there is a problem with the HFL mike, you should bring the car back to a dealer for warranty repair.

This is the thread:
https://acurazine.com/forums/money-investing-17/ing-131268/

 

I may be mistaken but I thought I saw an adjustment for the MIC while in the NAV diagnostic menus.

 

Yes there is an adjustment for the MIC Level in the NAV Diagnostic menus, but it is disabled...

 

Is it possible to enable it and how?

 

What year is your TL? I have an '05 and I can adjust the mic level by going in through the diagnostics menu.

 

Staggerwing, I have the 05. How do you get to the diagnostics menu?

 

I say Let the Wookie win. Huh?

I am an EE; my experience with things electronic suggests that the sensitivity of the microphone in the TL is not fixed, but variable, and likely controlled by an algorithm in a chipset. It is similar to phone systems like PolyComms. The system tries to procide user friendliness, and the best clarity for the person on the other end of the phone system, by looking for best signal to noise (S/N) level, and varying the sensitivity of the mic input. This would need to be varibale to deal with changing ambient noise - road surface, windows open, spectral profile of the driver's voice, and so on. Even if one could vary the level manually, I doubt one would want to - the cockpit is not static, but constantly changing, and boosting the sensivity could easily result in an input overload, which would be counter-productive.

Old AM radios had a primitive analog system called AVC - automatic volume control. It tried to deal with the variability of AM radio - where one station could be loud, and the next one much weaker. FM radio does not employ AVC, as for the most part, one's radio either locks onto an FM station, or it doesn't. The threshold is also the sensitivity, as in our TL's mic.

I have noticed that it takes the TL system a few seconds analyze the conditions, and adjust. That is why one often has someone at the other end say "Hello? Hello?". The system adjust gain, and/or one speaks louder to offset the threshold needed for everything to click - again, it will depend on the ambient noise. This is easily demonstrated by the fact that if one is parked with the engine off, the system usually works just fine right off - less excessive/variable ambient noise to deal with.

AVC, or the early Dolby noise reduction systenms for cassettes, modulate input levels. In Dolby, this is done during recording (boosted level in the highs) and playback (reduced level in the highs). Problems was, during quiet sections, one could hear the system doing it homework, and the result was what engineers call "breathing" - the system crudely producing easily heard variations in hiss.

Bottom line? - the TL's sound and voice systems are quite well engineered - short of improived software requiring a download/upgrade, I suggest that monkeying with the system might be counter-productive. It is lke those geegaw add-ons to cellular phones - they sounded or looked appealing perhaps, but have you found one that did much good.

Let the Wookie win.

 

Press and hold the Map/Guide button. While holding it, press and hold both Menu and Cancel. Hold all three in for about 3 seconds, and the Nav diagnostic menu comes on.

I must warn you though, you're playing with fire in there so be careful

 

Anyone have any ideas how to do it for a non-navi?

 

Beetoy - leedogg's directions are correct. If you blow anything up by mistake just unhook the car battery for 30 seconds and then reconnect. If you're at a screen and you get nervous about making a change, just hit the cancel button.

maluskills - since the non-navi isn't running the hitachi system, my guess is that you can't adjust it. Does the non-navi even have voice command?

 

I go into the area and saw the mic thing, but I don't understand how you set anything on that screen. Can you help?