humming caused by cellphone
Printed From: the12volt.com
Forum Name: Car Audio
Forum Discription: Car Stereos, Amplifiers, Crossovers, Processors, Speakers, Subwoofers, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=25041
Printed Date: May 14, 2025 at 5:02 PM
Topic: humming caused by cellphone
Posted By: mikep3
Subject: humming caused by cellphone
Date Posted: January 21, 2004 at 9:45 PM
Here's my setup: Clarion HU, Audiobahn a8001d amp and a audiobahn aw1205q sub. Whenever someone calls me on my cellphone or when I make a call I get a loud humming sound from my sub. I'm guessing I'm getting feedback through my system from my phone. Is there any way to stop this. It only happens from my phone none of my friends phones cause this problem. I have a nokia 33 something. The first small nokias without a antenna. Any help would be greatly appreciated. Thanks in advance
Replies:
Posted By: Teken
Date Posted: January 21, 2004 at 11:41 PM
1. Re-route the RCA cables from the HU.
2. Upgrade the RCA cables, which are more shielded.
3. Change the cut off freq of the unit(s) affected.
4. Shunt the antenna wire from the HU and the antenna mast.
5. Stop talking while your driving, as you are a theat to me, and everyone else on the road.
6. Get a new phone, which wont cause you brain cancer.
7. Reduce the gain on the amplifer.
Regards
EVIL Teken . . .
Posted By: mikep3
Date Posted: January 22, 2004 at 11:54 AM
thanks but you didnt have to give the last couple suggestions. One maybe I pullover when I get a phone call and 2 it makes this humming and popping noise while it switches from transmittiers not just while im talking. I am not a hazard to the road since i have a standard and it almost physically impossible to drive while talking. Also it has been suggested that cellphones dont give brain cancer.
Posted By: fuseblower
Date Posted: January 22, 2004 at 12:01 PM
It's just your phone there is no cure for the problem... place your phone next to a computer and call it... the radio emmissions will probably screw up your screen while the phone rings.
Posted By: goldfinger
Date Posted: January 22, 2004 at 12:35 PM
I can feel your pain bud. Mine does the exact same thing near any kind of audio equiptment, be it my computer speakers, headphones, car, whatever. It doesn't even have to be extremely close aslong as it's within 10 feet or so. It almost sounds like a helecopter hovering.  What kind of phone do you have?
Posted By: mikep3
Date Posted: January 22, 2004 at 1:03 PM
Its a nokia 3360
Posted By: Teken
Date Posted: January 22, 2004 at 4:51 PM
mikep3 wrote:
Also it has been suggested that cellphones dont give brain cancer.
Those are the same exact people who only 20 years ago, said that living under or near high output power lines has no effect on the human body.
They were wrong !!!
These are also the same people who say smoking isnt bad for you.
They were wrong !!!
These are also the same people who thought microwaves were too big to pass through a 1/4 hole.
They were wrong !!!
Anything that radiates RFI, EMI, ELF fields into the human body for prolonged durations will change the human tissue.
That is a fact . . .
Regards
EVIL Teken . . .
Posted By: mikep3
Date Posted: January 22, 2004 at 5:13 PM
I dont want to start something but my uncle works for a power company and he is NOT a mutated freak. Yes maybe EMI, RFI and ELF fields do have some affect on the body in very high doses over a lifetime of use. Maybe, but there has been studies from reputable sources that state the use of a cellphone leads to no increased chances of cancer. What is the difference anyways our bodies are bombarded from these fields by many sources that a cellphone does not really increase your chances of getting cancer. Its like saying your safer if your only standing in a smokey room and not actually smoking yourself. Everyone thinks they can be safer by cutting out one thing and blaming that one thing when really it is a combination of things causing the problem! regards Mike
Posted By: customsuburb
Date Posted: January 22, 2004 at 6:27 PM
So Teken, your saying that everyone that works at any power plant will have mutated tissue. I DONT think so. By the way, I dont smoke.
Posted By: Teken
Date Posted: January 22, 2004 at 6:55 PM
customsuburb wrote:
So Teken, your saying that everyone that works at any power plant will have mutated tissue.
Read over what I wrote again. If you live near high output transmission lines, whether they be the sub stations which you see all caged up, or those area's which are grouped in four (towers) quadrants.
You will be affected by the EMI from them. I am not speaking about the building that monitors and distributes the power.
Regardless of that, perhaps you should ask your uncle why certain area's are shielded within the building from the rest of the on-line workers??
Do you think its to only to protect the computers?
Regards
EVIL Teken . . .
Posted By: audiocableguy
Date Posted: January 22, 2004 at 6:59 PM
Nextel is know for similar problems you have described. Usually you hear or see a clicking. If next to a comp. monitor it snows the screen. The signal being recieved as the phone updates or when a call comes in. It can be a blessing and a curse!
I had a client stand next to a professional wireless microphone rack in Boston who's nextel click was broadcast oversees and picked up by the BBC during the Ryder Cup broadcast! My first question was, who has the Nextel? No doubt what clicking was comming from!
Except for keeping the phone far from electronics, not sure what else you could do!
Posted By: auex
Date Posted: January 22, 2004 at 7:02 PM
It happens to me all of the time. Full factory audio system in my truck, and I have a nextel. It can be annoying but there really is nothing that you can do about it, less losing the cell phone.
-------------
Certified Security Specialist
Always check info with a digital multimeter.
I promise to be good.
Tell Darwin I sent you.
I've been sick lately, sorry I won't be on much.
Posted By: Teken
Date Posted: January 22, 2004 at 7:09 PM
mikep3 wrote:
it is a combination of things causing the problem!
Mike,
Actually it is the amount of time, intensity, mass, distance, saturation, localization, which will determine the outcome.
The simplest example I can give anyone as proof is in regards to the 1980's cell phones.
You will note that they all were based on a 4 watt power output level. All current cell phones are well below half a watt.
Does anyone want to guess why someone would change power
output of a proven design to something lower???
Today with all our technology, we are able to cram in millions of circuits into one small chip. Power output and power saving features are also at its all time performance level.
If any of the cell companies were so inclined to produce such a powerful phone, dont you think they would as a touting feature???
They are very much in the know, as was the smoking companies. They have run endless tests on rats and other small animals for years to see what effect close proximity of high output waves has on tissues.
The result is obvious, saturation of any tissue for prolonged durations or where the intensity is close enough to soft tissue will alter the cells within.
Noone has to believe me, you simply have to go read about it in any scientific or medical journal which relates to RFI * EMI transmissions.
Just my thoughts on that.
EVIL Teken . . .
Posted By: customsuburb
Date Posted: January 22, 2004 at 8:08 PM
And how many cases of people getting cancer from RFI * EMI transmissions..... what can you say about that?
Posted By: NINsane18
Date Posted: January 22, 2004 at 8:13 PM
5. Stop talking while your driving, as you are a theat to me, and everyone else on the road.
LoL Evil Teken
-------------
Tim-May!
Posted By: mikep3
Date Posted: January 22, 2004 at 8:22 PM
Another possible reason that the companies have gone down in power is due to a little thing called heat. This is the same reason that computers have gone down from 5 volts to power the cpu to 3.3 volts. One of the reasons is with a faster the processor you get a higher frequency and more voltage peaks per a given time therefore more heat will be given off. If you drop that peak voltage from say 5v to 3.3v you also drop the current and the V*I will drop as well. And since they are trying to put these products in smaller cases they need all the help with heat as possible. Also when you are using less power you're battery will last a hell of a lot longer. Ever remeber those 4W phones you speak of running out of battery in a couple hours (exageration). But seriously I know battery quality has increased greatly in the years with the intorduction of lithium ion and such but also we use less power to conserve batteries. Also electronic components these days use less power to get the same job done. And for explanation of EMI, of more power = more EMI is not entirely true. There are a lot of factors that affect EMI, and the more common is the faster the rate of change of voltage per time the more EMI. The more power, which I believe you meant to say more current flowing in a conductor will affect the distance the EMI can have an affect on. This is why power companies use zero voltage crossing circuits to trigger triacs instead of phase control. With zero crossing the rate of change of voltage per time period is less reducing the EMI and one of the main factors for this is there delicate electronics. They dont want it affecting their computers or their control lines. But I would like you to point me to one of these scientific documents that you speak of. I find this quite facinating. Also this arguing is getting quite old. You've probably done more damage to yourself sitting in front of your computer screen today then a cell phone would do in a year. I'm guessing you have a CRT screen where a beam of electrons are getting shot at you. Yes most of them hit the screen and get deflected elsewhere but for those ones that go through and into your body and actually hit your DNA and other vital info in your cells that cause cancer. Basically like a very low powered x-ray. Thats what you should be worried about! I'll give you the same advice you gave me. You should throw away that cancer causing screen. We could all go back to horse and buggy and candle light and forget all about EMI and such. Ah wait a second then the smoke from the candle light, its a carcinogin and can give you lung cancer. My point, everything in life can harm you in some way or another you shouldnt preach to others about your feelings. I wasn't asking if I should throw away my cellphone in my post I was asking about a feedback problem. This is what ruins forums. When people start assuming things and start giving an attitude. If you dont want to reply nicely, dont reply. There were plenty of other people willing to give their opinions in a nice way. Thank you to those that did. regards Mike
Posted By: Teken
Date Posted: January 22, 2004 at 10:01 PM
mikep3 wrote:
Another possible reason that the companies have gone down in power is due to a little thing called heat.
That could be a reason, but it is not the case here, with respect to radiated RFI emissions.
mikep3 wrote:
The more power, which I believe you meant to say more current flowing in a conductor will affect the distance the EMI can have an affect on.
Technically speaking no. There is not more current flowing with a 4 watt transmitting cell phone. The power output of the signal is simply amplified.
Power can be increased in many ways without increasing current. Using a simple trasnsitor is the most basic method, using coupling techniques is another, a transformer is another, cascading, etc.
mikep3 wrote:
The more power, which I believe you meant to say more current flowing in a conductor will affect the distance the EMI can have an affect on.
What I am saying is that, people who live near these power distribution hubs, or transmission quadrants are affected by several simple factors.
It is the amount of time, intensity, and proximity which they are situated to the lines, which are affecting them.
mikep3 wrote:
But I would like you to point me to one of these scientific documents that you speak of.
I did not say there is a document. I stated that their are resources on the Internet, or journals which explain the effects of RFI, EMI, and ELF have on human tissue's.
Take a minute to search, and you will find it.
mikep3 wrote:
I find this quite facinating.
Actually you don't . . . You have already stated that fact below.
*Also this arguing is getting quite old.*
I am not here to argue with you, or anyone. I have made a statement, and have expressed my position as it relates to the topic at hand.
That is why its called freedom of speach, and I am expressing it, do you remember that right?
This is a open forum, correct? You did ask anyone for their IMO, and now you are not?
Choose one. . .
mikep3 wrote:
I'm guessing you have a CRT screen
No, I use a LCD . . .
mikep3 wrote:
I'll give you the same advice you gave me.
My first reply to you, was a statement. It was not advice, with respect to phone usuage and what will happen to you if you continue to use a cell phone which clearly emits a large amount of RFI. Which you have stated yourself as affecting your equipment.
It does not dawn on you as to what it is doing to your mellon???
mikep3 wrote:
My point, everything in life can harm you in some way or another
I agree . . .
mikep3 wrote:
you shouldnt preach to others about your feelings.
I have stated a position on a topic, which I am entitled to. Preaching would mean that I had followers which I do not, or those people who come to my house unwelcomed to sell, or change my views about religion.
I am not here to sell, or change your mind. You can do what ever you please. Matters not to me if you wake up tomorrow with a third arm, or a tale.
You have no affect on my life, nor do I . . .
mikep3 wrote:
I was asking about a feedback problem.
And I provided you with several options... And???
mikep3 wrote:
This is what ruins forums.
No . . . It is the inability of others to make a position in an consice manner which is not verbally offensive, or *be mature enough* to see others points of view.
mikep3 wrote:
When people start assuming things and start giving an attitude.
Show me something I have written here, which, could be considered giving you an *Attitude* ???
mikep3 wrote:
If you dont want to reply nicely, dont reply.
You know I am not here to hurt your feelings. In the same token, I am here to hold your hand.
We are all here to learn, and teach others something which we do not know, or have not experienced.
With regards to this cell phone issue, I have expressed my point of view on the topic at hand.
If you come to an open forum and ask a Q, do you not think you will recieve feed-back???
Just because you dont like it, that isnt really my problem, is it???
I don't like half the people I meet at work day in and day out. But I do have to take what they have said, in to consideration.
Why??? Because they could be right . . . And could have made me aware of something I was not aware of.
That is life, you live and learn. Do you really need to learn the hard way???
Regards
EVIL Teken . . .
Posted By: mikep3
Date Posted: January 22, 2004 at 10:50 PM
I was not saying that more current was flowing in a 4 Watt cellphone. I was saying that's what increases the distance that EMI can be felt by other devices. I was also not saying and old cellphone created more or less EMI then todays. I was saying that they reduced it due to heat. I know how more power can be accomplished and was not saying current gain was the only way. I was making that example for EMI distance purposes. Exactly there is no document with proven cases of EMI causing cancer. Only speculation about its affect. They also believed the sun revolved around the earth at one point. Don't take that statement the wrong way. I am not saying EMI doesn't cause harm I'm just saying there is no proven research yet to prove or disprove their theories. But it was you with your origional post that said they cause cancer. You should have said cellphone are specualted by few to cause cancer. I did say EMI affects electrical equipment. Funny at no point has anyone ever found a organic cell in a computer or other electrical device. The reason EMI affects electrical devices is because it can induce a voltage in a conductor that it cuts. And we all know electrical devices dont work quite right if there are different voltage levels then designed for. Teken] wrote:
. Get a new phone, which wont cause you brain cancer.
Was that not advice? Teken] wrote:
. Stop talking while your driving, as you are a theat to me, and everyone else on the road.
And that was attitude and assumption. I don't talk while driving and you were giving me attitude about driving while talking. Yes I am well aware about getting feedback from an open forum but where does my driving habits or unproven theories about cancer come in to play on a question about feedback in an audio forum? I believe I have been very mature about this. I'm not sure if you were saying i was or was not but that does not concern me. You stated there is no proven research about EMI, RFI so you should not state it as fact until otherwise proven. And you totally lost my point about bad forums. If you were to ask a question and in response all you got was attitude you would not be happy either. I have shown you no attitude just clearly stated that theres no proven research to back up your opinion. One last question, what were you trying to get out of point 5 of your origional post? How was that of any relevance? probably just to make me mad hey Mike
Posted By: Teken
Date Posted: January 22, 2004 at 11:35 PM
mikep3 wrote:
Exactly there is no document with proven cases of EMI causing cancer. Only speculation about its affect.
You know that is what they said about smoking. And that there was NEVER any documents which showed that either the manufacture was aware, or did conclude that their products caused serious side effects on human tissue.
That is currently the same state of affairs as it pertains to this matter. The only difference here is that the cell phone companies have already reduced the
output power, and have been pro-active.
mikep3 wrote:
I am not saying EMI doesn't cause harm
Glad we agree, which is my point. . .
mikep3 wrote:
I'm just saying there is no proven research yet to prove or disprove their theories.
The D.O.D has many years of R&D and testing and results about ELF and related topics. If you are so inclined, you may submit a *freedom of information* request. And they will provide you with their findings.
mikep3 wrote:
But it was you with your origional post that said they cause cancer. You should have said cellphone are specualted by few to cause cancer.
As I stated before, my position is that they do. But, to be clear noone can make a blanket statement that all cell phones do emit harmful RFI.
Each maker has addressed their power output with respect to their design goals and freq used.
mikep3 wrote:
Was that not advice?
No, it was not . . .
mikep3 wrote:
I don't talk while driving and you were giving me attitude about driving while talking.
I will quote you directly.
mikep3 wrote:
Whenever someone calls me on my cellphone or when I make a call I get a loud humming sound from my sub
If you're trying to tell me that each time you recieve or make a call, that you pull over while you are in motion.
Then I applaud you . . . But it is my personal experience that, it is, not the case.
mikep3 wrote:
I believe I have been very mature about this. I'm not sure if you were saying i was or was not
I was simply answering your question. It was not to infer that you were not.
mikep3 wrote:
You stated there is no proven research about EMI, RFI
I did not state that. . . I stated that if you wish to read more about the topic at hand, that you take the time and resources to locate and read them over.
Whether that be in a library, book, Internet, or otherwise.
mikep3 wrote:
probably just to make me mad hey
Mike,
If my intent was to make you mad, that would have been plainly clear to everyone.
Once again, I made statements that addressed your initial Q. I also stated two other things, in line with the topic.
Was it relevent?? I believe so at the time, and do so now.
Regardless of what I think, you will decide what to do. Why does it bother you so much???
If this hasnt sunk in to you yet. If I was so inclined to attack or belittle you, or any member.
I would have done so, right from the start, and would have been very clear on my thoughts and expressed them in a manner which would be very clear to all.
I call it like I see it, for better or worse.
I am exactly the same in person, I speak my mind, and express my thoughts on topics which I feel can help others.
I don't know if that makes any difference to you. But that is the bottom line. You take it anyway you want to.
Not everyone you meet on the net will be so inclined to be so polite to explain to you their thought process.
Which I have done so here.
Regards
EVIL Teken . . .
Posted By: Clean Install
Date Posted: January 22, 2004 at 11:53 PM
WOW, that was interesting..... great to read.... I like my hands free set.....i dont think thats can hurt much (except for when I set it on my Lap) ------------- If we learn from each success and
each failure, then we can improve ourselves
Posted By: mikep3
Date Posted: January 23, 2004 at 12:47 PM
I didn't really care about your point of EMI causing cancer. The only reason I continued that discussion was because of your general lack of knowledge on the subject of EMI and you're lack of knowledge of power. It was your comment of me driving while talking that I didn't like. This problem doesnt just happen while talking as the phone rings I also encounter this problem. So even if I dont pull over to talk I could let the phone ring and since I have call display phone the said person back when I'm not busy. But because I have the feedback problem while its ringing I'm sol. I just feel that you didnt have to make that comment and thats my opinion. Anyways Clean install I wouldnt worry about your cellphone. The chance that EMI or RFI energy will dislodge an electron in a cell and cause it to turn cancerous is very slim. It's kinda like a lottery whether or not it will happen noone knows. You have a better chance of getting hit by lightning so stay out of the rain. The body is constantly producing cancerous cells but it is also killing those cells. So by chance if radiation from a cellphone caused a cancer cell it doesnt't mean you fo sure will get cancer. Mike
Posted By: Teken
Date Posted: January 23, 2004 at 5:06 PM
mikep3 wrote:
The only reason I continued that discussion was because of your general lack of knowledge on the subject of EMI and you're lack of knowledge of power.
LMFAO . . . *Must breath* LOL
mikep3 wrote:
It was your comment of me driving while talking that I didn't like.
So the next time you pick up the phone to speak with someone, while you are driving. You will be even more mad, because you will have recalled this conversation !!!
Regards
EVIL Teken . . .
Posted By: mikep3
Date Posted: January 23, 2004 at 5:25 PM
I didnt say I talk while I drive. I said I didnt like the comment you made Saying you thought I did. And your comment of a devices making more power is wrong. If that is true please design me an amp that can output 1000w RMS with an input of 1 amp at 14.4v. No device I ever heard of can be more then 100% efficient so the power does come from somewhere if the output is putting out a certain amount.
Posted By: Teken
Date Posted: January 23, 2004 at 5:39 PM
You know the amount of BS you make up is painfully apparent.
Everyone who has read over this thread can see that you have restated, or back pedaled on things you have written about.
I have cited you on at least 2 accounts. Would you like me to keep going???
*design me an amp that can output 1000w RMS with an input of 1 amp at 14.4v.*
Would you like to keep BSing with your examples???
Regards
EVIL Teken . . .
Posted By: Teken
Date Posted: January 23, 2004 at 5:43 PM
mikep3 wrote:
I didnt say I talk while I drive.
No . . . You are simply just sitting there in your car all day, and not moving, as the phone is ringing and bothering you.
Yeah . . . OK . . . You should stop, while you're ahead.
Posted By: mikep3
Date Posted: January 23, 2004 at 5:47 PM
Yes unlike you i do get more the one call a month and yes I am sometimes in my car while it happens.
Posted By: Teken
Date Posted: January 23, 2004 at 5:52 PM
*Power can be increased in many ways without increasing current. Using a simple trasnsitor is the most basic method, using coupling techniques is another, a transformer is another, cascading, etc.*
Above is what I stated before, try to comprehend this.
*And your comment of a devices making more power is wrong.*
Above is what you stated, now explain to me how I am incorrect??
Please explain . . .
Here, I will throw you a bone. . . When a large amount of gain is required, what is used to increase it???
When a number of RC coupled amplifiers are combined what is it called?? This would answer your question of whether I am right or not. . .
Posted By: Teken
Date Posted: January 23, 2004 at 5:56 PM
mikep3 wrote:
Yes unlike you i do get more the one call a month and yes I am sometimes in my car while it happens.
No . . . Unlike you, I have decided to use common sense . . . I turn off my cell phone, while I am driving, and do not let anything distract me from doing so.
Do you remember drivers ed??? You must have missed that part about having things on, so as it would not interfere with you driving !!!
This keeps getting better and better, keep going. . .
Posted By: mikep3
Date Posted: January 23, 2004 at 6:05 PM
If you read my comment I said devices can't make more power. Why dont you read some of my comments. I know power can be increased without increase in current. You said the power of a signal is amplified. The voltage or current of the signal is amplified. The byproduct of which is more power and that power is converted from some other source such as a battery. And your comment about power increasing EMI was incorrect. The change in voltage per time increases EMI. Or in other words the frequency is what is affecting EMI. You don't need a lot of power for EMI to be potentially harming. A very small signal can be harming if the signal is of sufficient frequency. So cellphone companies decreasing power is to do with heat and battery life not EMI damage.
Posted By: auex
Date Posted: January 23, 2004 at 6:10 PM
Wow, another never ending post! Who would have thought?
-------------
Certified Security Specialist
Always check info with a digital multimeter.
I promise to be good.
Tell Darwin I sent you.
I've been sick lately, sorry I won't be on much.
Posted By: mikep3
Date Posted: January 23, 2004 at 6:12 PM
So I'm sure you drive without the radio on too. Seems kinda funny since you are on a car audio forum and dont have a stereo. But again I'm sure you took drivers ed and dont let the radio distract you. When someones in the car You probably dont talk to them either. Even though your eyes are on the road you better not let them talk to you or else your mind might wonder and thats not safe. In fact I'm sure you let them talk so please get off the road since you are a hazard to me and anyone else on the road.
Posted By: Teken
Date Posted: January 23, 2004 at 6:14 PM
LMFAO . . . Come on, you could have been more original. I know you can do better than that, have at it . . .
Posted By: Teken
Date Posted: January 23, 2004 at 6:16 PM
auex] wrote:
Wow, another never ending post! Who would have thought?
LOL, OK . . . I will stop. This will be my last post in this thread, unless I am attacked again from Author in question. 
Posted By: mikep3
Date Posted: January 23, 2004 at 6:20 PM
I agree this thread went on way to long next time just get your facts straight. And that wasn't an attack.
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