What is the purpose of this automobile microphone

Active noise cancellation? would only work for one person, if that and limited to simple repetitive noise, adding antiphase of the received noise

A number of car stereos have a setup that is used when first installed to automatically set the volume and eq (bass/treble) for each speaker so it is optimized.

When in that mode, the radio plays a number of tones and white noise one speaker at a time to figure out the best pattern for the driver. That microphone is used to listen to those tones. You aren't in the car, you place the mic where your head would be and get out of the car and let the radio run the tests.

You don't leave it in circuit, after the radio does it's thing, it's removed.

Both my original radio and the current one has modes for "driver only", "front only" and "4 passenger". It's just a tweak to get the best sound based on how many people are in the car.

Unless you have a radio that does the auto configuration, there is no point having one of those mics.

-bruce snipped-for-privacy@ripco.com

I thought I'd heard all the daft features modern cars have until I read this. Talk about needless complexity.

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It's a fairly effective way to get better sound from small speakers in nonideal locations.

Most consumer products are needless now in this society.

NT

Maybe if you have perfectly good hearing. At my age, I don't, so the best way for me to set up a sound system would be by personal listening and fiddling.

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Auto-EQ. Please read through the questions and answers at the bottom of the Amazon page.

The way it's suppose to work is you termorarily plug in the mic and place it at your favorite listening position. You then punch the Auto-EQ button, which adjusts the delays and levels to the speakers so that the player sounds reasonable. You then remove the microphone and put it some place where you can lose it. That's why there are replacement mics for sale on Amazon.

Notice that you can only adjust the equalization automatically with the microphone. There is no manual adjustment on this Pioneer player.

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Jeff Liebermann     jeffl@cruzio.com 
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Hardly anyone knows how to use them anyway.

Just twiddle with the knobs and sliders until it sounds good. What else does one need to know?

I'm not sure if equalizing the room delays in a "room" as small as an automobile makes any sense. For an automobile CD/DVD player, the front panel would never have enough space for the necessary controls and display. Anyway, I can barely hear the music over the road noise in my car.

Drivel: I've been playing with Room EQ Wizard software for about a year: So far, it has demonstrated is that I have no idea what I'm doing and that having 2 out of 4 walls in my multipurpose music room made from plate glass windows (no curtains), is a really bad idea.

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Jeff Liebermann     jeffl@cruzio.com 
150 Felker St #D    http://www.LearnByDestroying.com 
Santa Cruz CA 95060 http://802.11junk.com 
Skype: JeffLiebermann     AE6KS    831-336-2558

Thanks, Bruce. (and thanks, Jeff) I n ever would have guessed. (My car radio was made in 1890.0

Unlike other makes, GM radios used to, maybe still do, reverse left and right for the back seat. I think that means wherever one is in the car, he gets and equal dose of left and right, instead of having to sit in the middle of the car (where no one sits.) It's a dilemma. When I drove a stage coach, I was usually alone and I always sat in the middle, so that I had the right balance of left and right.

You saved me some money.

else does one need to know? "

Much. One sort of rule of thumb is to take FM hiss, turn off the muting and see which controls have the most effect. The ones with less effect should be boosting and the ones with more effect should be cutting. But that is a very rudimentary primer on it. People used to bring their cars to me to hav e me set the EQ, back when you could. Houses to, in factr I modified an EQ for a friend of mine because it was only a 5 band and he needed slightly di fferent frequencies. I turned the 60 Hz control into about a 40, the 250 in to a 150, left the 1,000 alone and the 3,500 but extended the 15 KHz to inf inity by removing the inductor. Also the new 40 Hz control's range extended to subsonic. I used resistance and whatever to get the range where I wante d it with the same inductor, but the cap I took to about 10 X its original value.

I actually heard that system and knew what it needed.

I am a \n expert on frequency response and tone controls. I designed a non- phase-shit set of bass and treble that are so bad to the bone some people w ouldn't even want them. The bass turnover adjustable from 48 to 440 Hz, and the treble from 3,500 Hz to about 9,000 Hz. Each has a range of +/- 16 dB.

These controls are to be used judiciously, you can't just say "I like bass, crank the bass all the way", you'll fry either your amp or woofers. The on ly time you want to use the full range of boost or cut is as a crossover fo r a subsat system. Even then, I have a no phase shift variable crossover. M uch better for the task.

But now with my ears I must really boost certain ranges, to the point where some people do not want to listen with me. But that's OK, been a loner for major parts of my life. Many people will not eat my food. I am a spice, ga rlic and HOT freak. The very few who eat mt cooking are very happy, but man y people just can't stand the strength of my spices. It is the same with th e stereo, it is tailored to ME.

You know this mic in the car shit is just a ruse. Like a Rube Golberg desig n. It will set the sound flat, but wait, they have the same data from the o ther 999,999 of those cars they sold. So bottom line it is a gimmick/

nd see which controls have the most effect. The ones with less effect shoul d be boosting and the ones with more effect should be cutting. But that is a very rudimentary primer on it. People used to bring their cars to me to h ave me set the EQ, back when you could. Houses to, in factr I modified an E Q for a friend of mine because it was only a 5 band and he needed slightly different frequencies. I turned the 60 Hz control into about a 40, the 250 into a 150, left the 1,000 alone and the 3,500 but extended the 15 KHz to i nfinity by removing the inductor. Also the new 40 Hz control's range extend ed to subsonic. I used resistance and whatever to get the range where I wan ted it with the same inductor, but the cap I took to about 10 X its origina l value.

5 band graphic eqs were crap, but the worst thing about them was that they wasted one of the sliders on a 1kHz band.

ign. It will set the sound flat, but wait, they have the same data from the other 999,999 of those cars they sold. So bottom line it is a gimmick/

Speakers vary though.

NT

just wondering how taking an GE to someone else to set-up is going to help me when I can't hear f*ck all above 12kHz!

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A lot of people find that. They did some research and put it down to the fact that the actors in days gone by had much better diction than today's upstarts. Possibly as a result of paying their dues in theatres. I find it especially noticeable in English films so perhaps you'd notice it most in American movies?

You have something decidedly out of whack somewhere!

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A lot of user audio devices are just terrible quality. With tiny speakers they use lots of bass boost & resonance, and the result is often a muddy mess.

NT

fact that the actors in days gone by had much better diction than today's upstarts. Possibly as a result of paying their dues in theatres. "

That may be but I think it is mostly the mics' frequency response. They had throat mics that I am sure needed a tom on equalization, now what, they are wireless and clipped to the belt ?

You have something decidedly out of whack somewhere! "

Yup, turned up loud with about 17 dB of boost at about 10 KHz and up, and material with heavy high frequency content.

And, maybe the car's pre-owner wanted to record everyone who got into the car.